From c236de3e67d68e4d9faf283dec86a0e1f333046d Mon Sep 17 00:00:00 2001
From: Christian Bender <christianbender89@web.de>
Date: Wed, 13 Dec 2017 23:02:42 +0100
Subject: [PATCH 01/23] collatz algorithm

collatz algorithm as function
---
 snippets/collatz.md | 11 +++++++++++
 1 file changed, 11 insertions(+)
 create mode 100644 snippets/collatz.md

diff --git a/snippets/collatz.md b/snippets/collatz.md
new file mode 100644
index 000000000..120f96e27
--- /dev/null
+++ b/snippets/collatz.md
@@ -0,0 +1,11 @@
+### Collatz algorithm
+
+If n even then returns **n/2** otherwise (n is odd) **3n+1**.
+It uses the ternary operator.
+
+``` javascript
+    const collatz = n => (n % 2 == 0) ? (n/2) : (3*n+1); 
+    // collatz(8) --> 4
+    // collatz(5) --> 16
+
+```
\ No newline at end of file

From 114fd89732662af46807de041fbed8bd76d989af Mon Sep 17 00:00:00 2001
From: Christian Bender <christianbender89@web.de>
Date: Thu, 14 Dec 2017 13:48:57 +0100
Subject: [PATCH 02/23] changed

I changed 'javascript' in 'js'
---
 snippets/collatz.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/snippets/collatz.md b/snippets/collatz.md
index 120f96e27..f92718b6c 100644
--- a/snippets/collatz.md
+++ b/snippets/collatz.md
@@ -3,7 +3,7 @@
 If n even then returns **n/2** otherwise (n is odd) **3n+1**.
 It uses the ternary operator.
 
-``` javascript
+``` js
     const collatz = n => (n % 2 == 0) ? (n/2) : (3*n+1); 
     // collatz(8) --> 4
     // collatz(5) --> 16

From 44feb706cd537c5979cd5b837e0b904d4a78961f Mon Sep 17 00:00:00 2001
From: Angelos Chalaris <chalarangelo@gmail.com>
Date: Thu, 14 Dec 2017 14:51:44 +0200
Subject: [PATCH 03/23] Update and rename collatz.md to collatz-algorithm.md

---
 snippets/collatz-algorithm.md |  9 +++++++++
 snippets/collatz.md           | 11 -----------
 2 files changed, 9 insertions(+), 11 deletions(-)
 create mode 100644 snippets/collatz-algorithm.md
 delete mode 100644 snippets/collatz.md

diff --git a/snippets/collatz-algorithm.md b/snippets/collatz-algorithm.md
new file mode 100644
index 000000000..730bdd9e3
--- /dev/null
+++ b/snippets/collatz-algorithm.md
@@ -0,0 +1,9 @@
+### Collatz algorithm
+
+If `n` is even, return `n/2`. Otherwise  return `3n+1`.
+
+```js
+const collatz = n => (n % 2 == 0) ? (n/2) : (3*n+1); 
+// collatz(8) --> 4
+// collatz(5) --> 16
+```
diff --git a/snippets/collatz.md b/snippets/collatz.md
deleted file mode 100644
index f92718b6c..000000000
--- a/snippets/collatz.md
+++ /dev/null
@@ -1,11 +0,0 @@
-### Collatz algorithm
-
-If n even then returns **n/2** otherwise (n is odd) **3n+1**.
-It uses the ternary operator.
-
-``` js
-    const collatz = n => (n % 2 == 0) ? (n/2) : (3*n+1); 
-    // collatz(8) --> 4
-    // collatz(5) --> 16
-
-```
\ No newline at end of file

From 76fc2317d3a79010153f9939b828f1c17d25a415 Mon Sep 17 00:00:00 2001
From: Angelos Chalaris <chalarangelo@gmail.com>
Date: Thu, 14 Dec 2017 14:53:37 +0200
Subject: [PATCH 04/23] Build README

---
 README.md | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/README.md b/README.md
index 1fb118d6f..2fccd2d85 100644
--- a/README.md
+++ b/README.md
@@ -21,6 +21,7 @@
 * [Chain asynchronous functions](#chain-asynchronous-functions)
 * [Check for palindrome](#check-for-palindrome)
 * [Chunk array](#chunk-array)
+* [Collatz algorithm](#collatz-algorithm)
 * [Compact](#compact)
 * [Count occurrences of a value in array](#count-occurrences-of-a-value-in-array)
 * [Current URL](#current-url)
@@ -230,6 +231,17 @@ const chunk = (arr, size) =>
 // chunk([1,2,3,4,5], 2) -> [[1,2],[3,4],5]
 ```
 
+[⬆ back to top](#table-of-contents)
+### Collatz algorithm
+
+If `n` is even, return `n/2`. Otherwise  return `3n+1`.
+
+```js
+const collatz = n => (n % 2 == 0) ? (n/2) : (3*n+1); 
+// collatz(8) --> 4
+// collatz(5) --> 16
+```
+
 [⬆ back to top](#table-of-contents)
 ### Compact
 

From c42ed5f746a573536ec2bc798e4416e34d582bb5 Mon Sep 17 00:00:00 2001
From: Angelos Chalaris <chalarangelo@gmail.com>
Date: Thu, 14 Dec 2017 15:41:40 +0200
Subject: [PATCH 05/23] Create fill-array.md

---
 snippets/fill-array.md | 10 ++++++++++
 1 file changed, 10 insertions(+)
 create mode 100644 snippets/fill-array.md

diff --git a/snippets/fill-array.md b/snippets/fill-array.md
new file mode 100644
index 000000000..a08c4362e
--- /dev/null
+++ b/snippets/fill-array.md
@@ -0,0 +1,10 @@
+### Fill array
+
+Use `Array.map()` to map values between `start` (inclusive) and `end` (exclusive) to `value`.
+Omit `start` to start at the first element and/or `end` to finish at the last.
+
+```js
+const fillArray = (arr, value, start = 0, end = arr.length) => 
+  arr.map((v,i) => i>=start && i<end ? value : v);
+// fillArray([1,2,3,4],'8',1,3) -> [1,'8','8',4]
+```

From 22331697df69b65ac7ed619dd6608a454574ae3d Mon Sep 17 00:00:00 2001
From: Angelos Chalaris <chalarangelo@gmail.com>
Date: Thu, 14 Dec 2017 16:10:43 +0200
Subject: [PATCH 06/23] Create flatten-array-up-to-depth.md

In reference to #100.
---
 snippets/flatten-array-up-to-depth.md | 13 +++++++++++++
 1 file changed, 13 insertions(+)
 create mode 100644 snippets/flatten-array-up-to-depth.md

diff --git a/snippets/flatten-array-up-to-depth.md b/snippets/flatten-array-up-to-depth.md
new file mode 100644
index 000000000..d28af98fb
--- /dev/null
+++ b/snippets/flatten-array-up-to-depth.md
@@ -0,0 +1,13 @@
+### Flatten array up to depth
+
+Use recursion, decrementing `depth` by 1 for each level of depth.
+Use `Array.reduce()` and `Array.concat()` to merge elements or arrays.
+Base case, for `depth` equal to `1` stops recursion.
+Omit the second element, `depth` to flatten only to a depth of `1` (single flatten).
+
+```js
+const flattenDepth = (arr, depth = 1) =>
+  depth != 1 ? arr.reduce((a, v) => a.concat(Array.isArray(v) ? flattenDepth (v, depth-1) : v), []) 
+  : arr.reduce((a,v) => a.concat(v),[]);
+// flattenDepth([1,[2],[[[3],4],5]], 2) -> [1,2,[3],4,5]
+```

From 4ae535d46deadf5b410452db6d734f6c00dc4f20 Mon Sep 17 00:00:00 2001
From: Elder Henrique Souza <elderhenrique@gmail.com>
Date: Thu, 14 Dec 2017 12:57:03 -0200
Subject: [PATCH 07/23] minor refactor to group by

---
 snippets/group-by.md | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/snippets/group-by.md b/snippets/group-by.md
index ab833c9d2..44505eb2f 100644
--- a/snippets/group-by.md
+++ b/snippets/group-by.md
@@ -5,10 +5,9 @@ Use `Array.reduce()` to create an object, where the keys are produced from the m
 
 ```js
 const groupBy = (arr, func) =>
-  (typeof func === 'function' ? arr.map(func) : arr.map(val => val[func]))
-    .reduce((acc, val, i) => {
-      acc[val] = acc[val] === undefined ? [arr[i]] : acc[val].concat(arr[i]); return acc;
-    }, {});
+  arr
+    .map(typeof func === 'function' ? func : val => val[func])
+    .reduce((acc, val, i) => { acc[val] = (acc[val] || []).concat(arr[i]); return acc; }, {})
 // groupBy([6.1, 4.2, 6.3], Math.floor) -> {4: [4.2], 6: [6.1, 6.3]}
 // groupBy(['one', 'two', 'three'], 'length') -> {3: ['one', 'two'], 5: ['three']}
 ```

From 21b8b18f6bec3f7fca5aa29c668a86be1d160799 Mon Sep 17 00:00:00 2001
From: Angelos Chalaris <chalarangelo@gmail.com>
Date: Thu, 14 Dec 2017 16:59:30 +0200
Subject: [PATCH 08/23] Update group-by.md

---
 snippets/group-by.md | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/snippets/group-by.md b/snippets/group-by.md
index 44505eb2f..ec8074ea2 100644
--- a/snippets/group-by.md
+++ b/snippets/group-by.md
@@ -5,9 +5,8 @@ Use `Array.reduce()` to create an object, where the keys are produced from the m
 
 ```js
 const groupBy = (arr, func) =>
-  arr
-    .map(typeof func === 'function' ? func : val => val[func])
-    .reduce((acc, val, i) => { acc[val] = (acc[val] || []).concat(arr[i]); return acc; }, {})
+  arr.map(typeof func === 'function' ? func : val => val[func])
+    .reduce((acc, val, i) => { acc[val] = (acc[val] || []).concat(arr[i]); return acc; }, {});
 // groupBy([6.1, 4.2, 6.3], Math.floor) -> {4: [4.2], 6: [6.1, 6.3]}
 // groupBy(['one', 'two', 'three'], 'length') -> {3: ['one', 'two'], 5: ['three']}
 ```

From 8244c204dde346fe9e6bd7864fd4ef947c274eb8 Mon Sep 17 00:00:00 2001
From: Angelos Chalaris <chalarangelo@gmail.com>
Date: Thu, 14 Dec 2017 17:02:10 +0200
Subject: [PATCH 09/23] Build README

---
 README.md | 35 +++++++++++++++++++++++++++++++----
 1 file changed, 31 insertions(+), 4 deletions(-)

diff --git a/README.md b/README.md
index 2fccd2d85..65a72b1a0 100644
--- a/README.md
+++ b/README.md
@@ -35,7 +35,9 @@
 * [Even or odd number](#even-or-odd-number)
 * [Factorial](#factorial)
 * [Fibonacci array generator](#fibonacci-array-generator)
+* [Fill array](#fill-array)
 * [Filter out non unique values in an array](#filter-out-non-unique-values-in-an-array)
+* [Flatten array up to depth](#flatten-array-up-to-depth)
 * [Flatten array](#flatten-array)
 * [Get max value from array](#get-max-value-from-array)
 * [Get min value from array](#get-min-value-from-array)
@@ -404,6 +406,18 @@ const fibonacci = n =>
 // fibonacci(5) -> [0,1,1,2,3]
 ```
 
+[⬆ back to top](#table-of-contents)
+### Fill array
+
+Use `Array.map()` to map values between `start` (inclusive) and `end` (exclusive) to `value`.
+Omit `start` to start at the first element and/or `end` to finish at the last.
+
+```js
+const fillArray = (arr, value, start = 0, end = arr.length) => 
+  arr.map((v,i) => i>=start && i<end ? value : v);
+// fillArray([1,2,3,4],'8',1,3) -> [1,'8','8',4]
+```
+
 [⬆ back to top](#table-of-contents)
 ### Filter out non-unique values in an array
 
@@ -414,6 +428,21 @@ const filterNonUnique = arr => arr.filter(i => arr.indexOf(i) === arr.lastIndexO
 // filterNonUnique([1,2,2,3,4,4,5]) -> [1,3,5]
 ```
 
+[⬆ back to top](#table-of-contents)
+### Flatten array up to depth
+
+Use recursion, decrementing `depth` by 1 for each level of depth.
+Use `Array.reduce()` and `Array.concat()` to merge elements or arrays.
+Base case, for `depth` equal to `1` stops recursion.
+Omit the second element, `depth` to flatten only to a depth of `1` (single flatten).
+
+```js
+const flattenDepth = (arr, depth = 1) =>
+  depth != 1 ? arr.reduce((a, v) => a.concat(Array.isArray(v) ? flattenDepth (v, depth-1) : v), []) 
+  : arr.reduce((a,v) => a.concat(v),[]);
+// flattenDepth([1,[2],[[[3],4],5]], 2) -> [1,2,[3],4,5]
+```
+
 [⬆ back to top](#table-of-contents)
 ### Flatten array
 
@@ -488,10 +517,8 @@ Use `Array.reduce()` to create an object, where the keys are produced from the m
 
 ```js
 const groupBy = (arr, func) =>
-  (typeof func === 'function' ? arr.map(func) : arr.map(val => val[func]))
-    .reduce((acc, val, i) => {
-      acc[val] = acc[val] === undefined ? [arr[i]] : acc[val].concat(arr[i]); return acc;
-    }, {});
+  arr.map(typeof func === 'function' ? func : val => val[func])
+    .reduce((acc, val, i) => { acc[val] = (acc[val] || []).concat(arr[i]); return acc; }, {});
 // groupBy([6.1, 4.2, 6.3], Math.floor) -> {4: [4.2], 6: [6.1, 6.3]}
 // groupBy(['one', 'two', 'three'], 'length') -> {3: ['one', 'two'], 5: ['three']}
 ```

From e9e63a96304251247b0b437e5fde762819008540 Mon Sep 17 00:00:00 2001
From: Elder Henrique Souza <elderhenrique@gmail.com>
Date: Thu, 14 Dec 2017 13:11:45 -0200
Subject: [PATCH 10/23] minor refactor to curry

---
 snippets/curry.md | 11 ++++-------
 1 file changed, 4 insertions(+), 7 deletions(-)

diff --git a/snippets/curry.md b/snippets/curry.md
index edb95461f..b47492721 100644
--- a/snippets/curry.md
+++ b/snippets/curry.md
@@ -6,13 +6,10 @@ Otherwise return a curried function `f` that expects the rest of the arguments.
 If you want to curry a function that accepts a variable number of arguments (a variadic function, e.g. `Math.min()`), you can optionally pass the number of arguments to the second parameter `arity`.
 
 ```js
-const curry = (f, arity = f.length, next) =>
-  (next = prevArgs =>
-    nextArg => {
-      const args = [ ...prevArgs, nextArg ];
-      return args.length >= arity ? f(...args) : next(args);
-    }
-  )([]);
+const curry = (fn, arity = fn.length, ...args) =>
+  arity <= args.length
+    ? fn(...args)
+    : curry.bind(null, fn, arity, ...args)
 // curry(Math.pow)(2)(10) -> 1024
 // curry(Math.min, 3)(10)(50)(2) -> 2
 ```

From b106585c08d53e324b902a319ecba5e450d486de Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Stefan=20Feje=C5=A1?= <ns.fejes.stefan@gmail.com>
Date: Thu, 14 Dec 2017 16:25:35 +0100
Subject: [PATCH 11/23] Fix grammar and spelling

---
 CONTRIBUTING.md | 18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)

diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index db1670488..d2bdbf7e1 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -12,9 +12,9 @@ Here's what you can do to help:
 ### Snippet submission and Pull request guidelines
 
 - **DO NOT MODIFY THE README.md FILE!** Make changes to individual snippet files. You can optionally run `npm run build-list` to update the README.md file automatically, based on the changes you have made.
-- **Snippet filenames** must correspond to the title of the snippet. For example if your snippet is titled `### Awesome snippet` the filename should be `awesome-snippet.md`.
+- **Snippet filenames** must correspond to the title of the snippet. For example, if your snippet is titled `### Awesome snippet` the filename should be `awesome-snippet.md`.
   - Use `kebab-case`, not `snake_case`.
-  - Avoid capitalization of words, except if the whole word is capitalized (e.g `URL` should be capitalized in the filename and the snippet title).
+  - Avoid capitalization of words, except if the whole word is capitalized (e.g. `URL` should be capitalized in the filename and the snippet title).
   - If there are parentheses in the title, add them to the filename (e.g. `awesome-snippet-(extra-awesome).md` if your snippet's title is `Awesome snippet (extra awesome)`).
 - **Snippet titles** should have only the first letter of the first word capitalized. Certain words can be in capitals (e.g. `URL`, `RGB`), but this is on a per-snippet basis.
   - All snippet titles must be prefixed with `###` and be at the very first line of your snippet.
@@ -28,21 +28,21 @@ Here's what you can do to help:
   - Try to keep your snippets' code short and to the point. Use modern techniques and features. Make sure to test your code before submitting.
   - All snippets must be followed by one (more if necessary) test case after the code, on a new line, in the form of a comment, along with the expected output. The syntax for this is `myFunction('testInput') -> 'testOutput'`. Use multiline comments only if necessary.
   - Try to make your function name unique, so that it does not conflict with existing snippets.
-- Snippets should be short (usually below 10 lines). If your snippet is longer than that, you can still submit it and we can help you shorten it or figure out ways to improve it.
+- Snippets should be short (usually below 10 lines). If your snippet is longer than that, you can still submit it, and we can help you shorten it or figure out ways to improve it.
 - Snippets *should* solve real-world problems, no matter how simple.
 - Snippets *should* be abstract enough to be applied to different scenarios.
-- It is not mandatory, but highly appreciated if you provide **test cases** and/or performance tests (we recommend using [jsPerf](https://jsperf.com/)).
+- It is not mandatory but highly appreciated if you provide **test cases** and/or performance tests (we recommend using [jsPerf](https://jsperf.com/)).
 - You can start creating a new snippet, by using the [snippet template](snippet-template.md) to format your snippets.
 
 ### Additional guidelines and conventions regarding snippets
 
 - When describing snippets, refer to methods, using their full name. For example, use `Array.reduce()`, instead of `reduce()`.
-- If your snippet contains argument with default parameters, explain what happens if they are ommited when calling the function and what the default case is.
+- If your snippet contains argument with default parameters, explain what happens if they are omitted when calling the function and what the default case is.
 - If your snippet uses recursion, explain the base cases.
 - Always use `const functionName` for function definitions.
-- Use variables only when necessary. Prefer `const` when the values are not altered after assignment, otherwise use `let`. Avoid using `var`.
+- Use variables only when necessary. Prefer `const` when the values are not altered after assignment, otherwise, use `let`. Avoid using `var`.
 - Use `camelCase` for function and variable names if they consist of more than one word.
-- Try to give meaningful names to variables. For example use `letter`, instead of `lt`. Some exceptions by convention are:
+- Try to give meaningful names to variables. For example use `letter`, instead of `lt`. Some exceptions to convention are:
   - `arr` for arrays (usually as the snippet function's argument).
   - `str` for strings.
   - `n` for a numeric value (usually as the snippet function's argument).
@@ -54,7 +54,7 @@ Here's what you can do to help:
   - `func` for function arguments.
   - `nums` for arrays of numbers.
 - Use `_` if your function takes no arguments or if an argument inside some function (e.g. `Array.reduce()`) is not used anywhere in your code.
-- Specify default parameters for arguments, if necessary. It is preferred to put default parameters last, unless you have pretty good reason not to.
+- Specify default parameters for arguments, if necessary. It is preferred to put default parameters last unless you have pretty good reason not to.
 - If your snippet's function takes variadic arguments, use `..args` (although in certain cases, it might be needed to use a different name).
 - If your snippet function's body is a single statement, omit the `return` keyword and use an expression instead.
 - Always use soft tabs (2 spaces), never hard tabs.
@@ -72,5 +72,5 @@ Here's what you can do to help:
 - Use arrow functions as much as possible, except when you can't.
 - Use semicolons whenever necessary. If your snippet function's body is a single statement, return an expression and add a semicolon at the end.
 - Leave a single space after a comma (`,`) character.
-- Try to strike a balance between readability, brevity and performance.
+- Try to strike a balance between readability, brevity, and performance.
 - Never use `eval()`. Your snippet will be disqualified immediately.

From 4a71bb886ff5b39e3fb809a7a86abc3cbda410fd Mon Sep 17 00:00:00 2001
From: Marcel Michau <marcelmichau@gmail.com>
Date: Thu, 14 Dec 2017 17:53:32 +0200
Subject: [PATCH 12/23] Minor grammar fix in array-concatenation snippet &
 rebuilt README

---
 README.md                       | 4 ++--
 snippets/array-concatenation.md | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/README.md b/README.md
index 65a72b1a0..ba2c3d8bd 100644
--- a/README.md
+++ b/README.md
@@ -69,7 +69,7 @@
 * [Promisify](#promisify)
 * [Random integer in range](#random-integer-in-range)
 * [Random number in range](#random-number-in-range)
-* [Redirect to URL](#redirect-to-url)
+* [Redirect to url](#redirect-to-url)
 * [Reverse a string](#reverse-a-string)
 * [RGB to hexadecimal](#rgb-to-hexadecimal)
 * [Run promises in series](#run-promises-in-series)
@@ -110,7 +110,7 @@ const anagrams = str => {
 [⬆ back to top](#table-of-contents)
 ### Array concatenation
 
-Use `Array.concat()` to concatenate and array with any additional arrays and/or values, specified in `args`.
+Use `Array.concat()` to concatenate an array with any additional arrays and/or values, specified in `args`.
 
 ```js
 const arrayConcat = (arr, ...args) => arr.concat(...args);
diff --git a/snippets/array-concatenation.md b/snippets/array-concatenation.md
index b4e2fa205..992036905 100644
--- a/snippets/array-concatenation.md
+++ b/snippets/array-concatenation.md
@@ -1,6 +1,6 @@
 ### Array concatenation
 
-Use `Array.concat()` to concatenate and array with any additional arrays and/or values, specified in `args`.
+Use `Array.concat()` to concatenate an array with any additional arrays and/or values, specified in `args`.
 
 ```js
 const arrayConcat = (arr, ...args) => arr.concat(...args);

From e5c1d29ce6d074e90f7dd5094e0c3d649bb44a04 Mon Sep 17 00:00:00 2001
From: Angelos Chalaris <chalarangelo@gmail.com>
Date: Thu, 14 Dec 2017 17:56:12 +0200
Subject: [PATCH 13/23] Added tagger script, tagged snippets retroactively

---
 package-lock.json |  65 ++--
 package.json      |   5 +-
 scripts/tagger.js |  70 ++++
 snippets/take.md  |   1 -
 tag_database      |  81 ++++
 yarn.lock         | 913 +++++++++++++++++++++++++++++++++++++++++++++-
 6 files changed, 1080 insertions(+), 55 deletions(-)
 create mode 100644 scripts/tagger.js
 create mode 100644 tag_database

diff --git a/package-lock.json b/package-lock.json
index be8bcab8d..4344c4b9b 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -65,16 +65,6 @@
       "resolved": "https://registry.npmjs.org/ansi-escapes/-/ansi-escapes-1.4.0.tgz",
       "integrity": "sha1-06ioOzGapneTZisT52HHkRQiMG4="
     },
-    "ansi-regex": {
-      "version": "0.2.1",
-      "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-0.2.1.tgz",
-      "integrity": "sha1-DY6UaWej2BQ/k+JOKYUl/BsiNfk="
-    },
-    "ansi-styles": {
-      "version": "1.1.0",
-      "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-1.1.0.tgz",
-      "integrity": "sha1-6uy/Zs1waIJ2Cy9GkVgrj1XXp94="
-    },
     "anymatch": {
       "version": "1.3.2",
       "resolved": "https://registry.npmjs.org/anymatch/-/anymatch-1.3.2.tgz",
@@ -333,21 +323,39 @@
       "integrity": "sha1-Sm+gc5nCa7pH8LJJa00PtAjFVQ0="
     },
     "chalk": {
-      "version": "0.5.1",
-      "resolved": "https://registry.npmjs.org/chalk/-/chalk-0.5.1.tgz",
-      "integrity": "sha1-Zjs6ZItotV0EaQ1JFnqoN4WPIXQ=",
+      "version": "2.3.0",
+      "resolved": "https://registry.npmjs.org/chalk/-/chalk-2.3.0.tgz",
+      "integrity": "sha512-Az5zJR2CBujap2rqXGaJKaPHyJ0IrUimvYNX+ncCy8PJP4ltOGTrHUIo097ZaL2zMeKYpiCdqDvS6zdrTFok3Q==",
+      "dev": true,
       "requires": {
-        "ansi-styles": "1.1.0",
+        "ansi-styles": "3.2.0",
         "escape-string-regexp": "1.0.5",
-        "has-ansi": "0.1.0",
-        "strip-ansi": "0.3.0",
-        "supports-color": "0.2.0"
+        "supports-color": "4.5.0"
       },
       "dependencies": {
+        "ansi-styles": {
+          "version": "3.2.0",
+          "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-3.2.0.tgz",
+          "integrity": "sha512-NnSOmMEYtVR2JVMIGTzynRkkaxtiq1xnFBcdQD/DnNCYPoEPsVJhM98BDyaoNOQIi7p4okdi3E27eN7GQbsUug==",
+          "dev": true,
+          "requires": {
+            "color-convert": "1.9.1"
+          }
+        },
+        "has-flag": {
+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/has-flag/-/has-flag-2.0.0.tgz",
+          "integrity": "sha1-6CB68cx7MNRGzHC3NLXovhj4jVE=",
+          "dev": true
+        },
         "supports-color": {
-          "version": "0.2.0",
-          "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-0.2.0.tgz",
-          "integrity": "sha1-2S3iaU6z9nMjlz1649i1W0wiGQo="
+          "version": "4.5.0",
+          "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-4.5.0.tgz",
+          "integrity": "sha1-vnoN5ITexcXN34s9WRJQRJEvY1s=",
+          "dev": true,
+          "requires": {
+            "has-flag": "2.0.0"
+          }
         }
       }
     },
@@ -442,7 +450,6 @@
       "resolved": "https://registry.npmjs.org/concurrently/-/concurrently-3.5.1.tgz",
       "integrity": "sha512-689HrwGw8Rbk1xtV9C4dY6TPJAvIYZbRbnKSAtfJ7tHqICFGoZ0PCWYjxfmerRyxBG0o3sbG3pe7N8vqPwIHuQ==",
       "requires": {
-        "chalk": "0.5.1",
         "commander": "2.6.0",
         "date-fns": "1.29.0",
         "lodash": "4.17.4",
@@ -1346,14 +1353,6 @@
         "function-bind": "1.1.1"
       }
     },
-    "has-ansi": {
-      "version": "0.1.0",
-      "resolved": "https://registry.npmjs.org/has-ansi/-/has-ansi-0.1.0.tgz",
-      "integrity": "sha1-hPJlqujA5qiKEtcCKJS3VoiUxi4=",
-      "requires": {
-        "ansi-regex": "0.2.1"
-      }
-    },
     "has-flag": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/has-flag/-/has-flag-1.0.0.tgz",
@@ -2855,14 +2854,6 @@
         "safe-buffer": "5.1.1"
       }
     },
-    "strip-ansi": {
-      "version": "0.3.0",
-      "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-0.3.0.tgz",
-      "integrity": "sha1-JfSOoiynkYfzF0pNuHWTR7sSYiA=",
-      "requires": {
-        "ansi-regex": "0.2.1"
-      }
-    },
     "strip-bom": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/strip-bom/-/strip-bom-3.0.0.tgz",
diff --git a/package.json b/package.json
index a616c02d0..2e12c8aac 100644
--- a/package.json
+++ b/package.json
@@ -11,10 +11,13 @@
   "description": "A collection of useful Javascript snippets.",
   "version": "1.0.0",
   "main": "index.js",
-  "devDependencies": {},
+  "devDependencies": {
+    "chalk": "^2.3.0"
+  },
   "scripts": {
     "build-list": "node ./scripts/builder.js",
     "lint": "node ./scripts/lintSnippet.js",
+    "tag": "node ./scripts/tagger.js",
     "start": "concurrently --kill-others \"nodemon -e js,md -i README.md -x \\\"npm run build-list\\\"\" \"live-server ./build\""
   },
   "repository": {
diff --git a/scripts/tagger.js b/scripts/tagger.js
new file mode 100644
index 000000000..6e2329e28
--- /dev/null
+++ b/scripts/tagger.js
@@ -0,0 +1,70 @@
+var fs = require('fs-extra');
+var path = require('path');
+var chalk = require('chalk');
+
+var snippetsPath = './snippets';
+
+var snippets = {}, output = '', tagDbData = {}, missingTags = 0, tagDbStats = {};
+
+const objectFromPairs = arr => arr.reduce((a, v) => (a[v[0]] = v[1], a), {});
+const countOccurrences = (arr, value) => arr.reduce((a, v) => v === value ? a + 1 : a + 0, 0);
+
+
+console.time('Tagger');
+
+try {
+  var snippetFilenames = fs.readdirSync(snippetsPath);
+  snippetFilenames.sort((a, b) => {
+    a = a.toLowerCase();
+    b = b.toLowerCase();
+    if (a < b) {
+      return -1;
+    }
+    if (a > b) {
+      return 1;
+    }
+    return 0;
+  });
+  for(var snippet of snippetFilenames){
+    snippets[snippet] = fs.readFileSync(path.join(snippetsPath,snippet),'utf8');
+  }
+}
+catch (err){
+  console.log('Error during snippet loading: '+err);
+  process.exit(1);
+}
+
+try {
+  tagDbData = objectFromPairs(fs.readFileSync('tag_database','utf8').split('\n').map(v => v.split(':').slice(0,2)));
+  // for(var tag of [...new Set(Object.entries(tagDbData).map(x => x[1]))])
+  //   tagDbStats[tag] = Object.values(tagDbData).filter(v => v === tag);
+  // console.log(tagDbStats);
+  tagDbStats = Object.entries(tagDbData).reduce((acc, val) => {acc.hasOwnProperty(val[1]) ? acc[val[1]]++ : acc[val[1]] = 1; return acc;}, {});
+}
+catch (err){
+  console.log('Error during tag database loading: '+err);
+  process.exit(1);
+}
+
+try {
+  for(var snippet of Object.entries(snippets))
+    if(tagDbData.hasOwnProperty(snippet[0].slice(0,-3)) && tagDbData[snippet[0].slice(0,-3)].trim())
+      output += `${snippet[0].slice(0,-3)}:${tagDbData[snippet[0].slice(0,-3)].trim()}\n`;
+    else {
+      output += `${snippet[0].slice(0,-3)}:\n`;
+      missingTags++;
+      console.log(`${chalk.red('Tag missing:')} ${snippet[0].slice(0,-3)}`);
+    }
+  fs.writeFileSync('tag_database', output);
+}
+catch (err){
+  console.log('Error during README generation: '+err);
+  process.exit(1);
+}
+console.log(`\n===Tag database statistics===`)
+for(var tagData of Object.entries(tagDbStats).filter(v => v[0] !== 'undefined')){
+  console.log(`${chalk.green(tagData[0])}: ${tagData[1]} snippets`);
+}
+console.log(`${chalk.blue('Untagged snippets:')} ${missingTags}\n`);
+
+console.timeEnd('Tagger');
diff --git a/snippets/take.md b/snippets/take.md
index 80142031d..44d6ff0bc 100644
--- a/snippets/take.md
+++ b/snippets/take.md
@@ -4,7 +4,6 @@ Use `Array.slice()` to create a slice of the array with `n` elements taken from
 
 ```js
 const take = (arr, n = 1) => arr.slice(0, n);
-
 // take([1, 2, 3], 5) -> [1, 2, 3]
 // take([1, 2, 3], 0) -> []
 ```
diff --git a/tag_database b/tag_database
new file mode 100644
index 000000000..5619a0369
--- /dev/null
+++ b/tag_database
@@ -0,0 +1,81 @@
+anagrams-of-string-(with-duplicates):string
+array-concatenation:array
+array-difference:array
+array-intersection:array
+array-union:array
+average-of-array-of-numbers:array
+bottom-visible:browser
+capitalize-first-letter-of-every-word:string
+capitalize-first-letter:string
+chain-asynchronous-functions:function
+check-for-palindrome:string
+chunk-array:array
+collatz-algorithm:math
+compact:array
+count-occurrences-of-a-value-in-array:array
+current-URL:browser
+curry:function
+deep-flatten-array:array
+distance-between-two-points:math
+divisible-by-number:math
+drop-elements-in-array:array
+element-is-visible-in-viewport:browser
+escape-regular-expression:utility
+even-or-odd-number:math
+factorial:math
+fibonacci-array-generator:math
+fill-array:array
+filter-out-non-unique-values-in-an-array:array
+flatten-array-up-to-depth:array
+flatten-array:array
+get-max-value-from-array:array
+get-min-value-from-array:array
+get-native-type-of-value:utility
+get-scroll-position:browser
+greatest-common-divisor-(GCD):math
+group-by:array
+hamming-distance:math
+head-of-list:array
+initial-of-list:array
+initialize-array-with-range:array
+initialize-array-with-values:array
+is-array:utility
+is-boolean:utility
+is-function:utility
+is-number:utility
+is-string:utility
+is-symbol:utility
+last-of-list:array
+measure-time-taken-by-function:utility
+median-of-array-of-numbers:array
+object-from-key-value-pairs:object
+object-to-key-value-pairs:object
+ordinal-suffix-of-number:utility
+percentile:math
+pick:array
+pipe:function
+powerset:math
+promisify:function
+random-integer-in-range:utility
+random-number-in-range:utility
+redirect-to-URL:browser
+reverse-a-string:string
+RGB-to-hexadecimal:utility
+run-promises-in-series:function
+scroll-to-top:browser
+shuffle-array:array
+similarity-between-arrays:array
+sleep:function
+sort-characters-in-string-(alphabetical):string
+standard-deviation:math
+sum-of-array-of-numbers:array
+swap-values-of-two-variables:utility
+tail-of-list:array
+take:array
+truncate-a-string:string
+unique-values-of-array:array
+URL-parameters:utility
+UUID-generator:utility
+validate-email:utility
+validate-number:utility
+value-or-default:utility
diff --git a/yarn.lock b/yarn.lock
index b5f1f6579..9dc4ac57e 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -13,7 +13,25 @@ accepts@~1.3.4:
     mime-types "~2.1.16"
     negotiator "0.6.1"
 
-ajv@^4.9.1:
+acorn-jsx@^3.0.0:
+  version "3.0.1"
+  resolved "https://registry.yarnpkg.com/acorn-jsx/-/acorn-jsx-3.0.1.tgz#afdf9488fb1ecefc8348f6fb22f464e32a58b36b"
+  dependencies:
+    acorn "^3.0.4"
+
+acorn@^3.0.4:
+  version "3.3.0"
+  resolved "https://registry.yarnpkg.com/acorn/-/acorn-3.3.0.tgz#45e37fb39e8da3f25baee3ff5369e2bb5f22017a"
+
+acorn@^5.2.1:
+  version "5.2.1"
+  resolved "https://registry.yarnpkg.com/acorn/-/acorn-5.2.1.tgz#317ac7821826c22c702d66189ab8359675f135d7"
+
+ajv-keywords@^1.0.0:
+  version "1.5.1"
+  resolved "https://registry.yarnpkg.com/ajv-keywords/-/ajv-keywords-1.5.1.tgz#314dd0a4b3368fad3dfcdc54ede6171b886daf3c"
+
+ajv@^4.7.0, ajv@^4.9.1:
   version "4.11.8"
   resolved "https://registry.yarnpkg.com/ajv/-/ajv-4.11.8.tgz#82ffb02b29e662ae53bdc20af15947706739c536"
   dependencies:
@@ -26,6 +44,10 @@ ansi-align@^2.0.0:
   dependencies:
     string-width "^2.0.0"
 
+ansi-escapes@^1.1.0:
+  version "1.4.0"
+  resolved "https://registry.yarnpkg.com/ansi-escapes/-/ansi-escapes-1.4.0.tgz#d3a8a83b319aa67793662b13e761c7911422306e"
+
 ansi-regex@^0.2.0, ansi-regex@^0.2.1:
   version "0.2.1"
   resolved "https://registry.yarnpkg.com/ansi-regex/-/ansi-regex-0.2.1.tgz#0d8e946967a3d8143f93e24e298525fc1b2235f9"
@@ -42,6 +64,10 @@ ansi-styles@^1.1.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/ansi-styles/-/ansi-styles-1.1.0.tgz#eaecbf66cd706882760b2f4691582b8f55d7a7de"
 
+ansi-styles@^2.2.1:
+  version "2.2.1"
+  resolved "https://registry.yarnpkg.com/ansi-styles/-/ansi-styles-2.2.1.tgz#b432dd3358b634cf75e1e4664368240533c1ddbe"
+
 ansi-styles@^3.1.0:
   version "3.2.0"
   resolved "https://registry.yarnpkg.com/ansi-styles/-/ansi-styles-3.2.0.tgz#c159b8d5be0f9e5a6f346dab94f16ce022161b88"
@@ -92,10 +118,31 @@ arr-flatten@^1.0.1:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/arr-flatten/-/arr-flatten-1.1.0.tgz#36048bbff4e7b47e136644316c99669ea5ae91f1"
 
+array-union@^1.0.1:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/array-union/-/array-union-1.0.2.tgz#9a34410e4f4e3da23dea375be5be70f24778ec39"
+  dependencies:
+    array-uniq "^1.0.1"
+
+array-uniq@^1.0.1:
+  version "1.0.3"
+  resolved "https://registry.yarnpkg.com/array-uniq/-/array-uniq-1.0.3.tgz#af6ac877a25cc7f74e058894753858dfdb24fdb6"
+
 array-unique@^0.2.1:
   version "0.2.1"
   resolved "https://registry.yarnpkg.com/array-unique/-/array-unique-0.2.1.tgz#a1d97ccafcbc2625cc70fadceb36a50c58b01a53"
 
+array.prototype.find@^2.0.1:
+  version "2.0.4"
+  resolved "https://registry.yarnpkg.com/array.prototype.find/-/array.prototype.find-2.0.4.tgz#556a5c5362c08648323ddaeb9de9d14bc1864c90"
+  dependencies:
+    define-properties "^1.1.2"
+    es-abstract "^1.7.0"
+
+arrify@^1.0.0:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/arrify/-/arrify-1.0.1.tgz#898508da2226f380df904728456849c1501a4b0d"
+
 asn1@~0.2.3:
   version "0.2.3"
   resolved "https://registry.yarnpkg.com/asn1/-/asn1-0.2.3.tgz#dac8787713c9966849fc8180777ebe9c1ddf3b86"
@@ -124,6 +171,14 @@ aws4@^1.2.1:
   version "1.6.0"
   resolved "https://registry.yarnpkg.com/aws4/-/aws4-1.6.0.tgz#83ef5ca860b2b32e4a0deedee8c771b9db57471e"
 
+babel-code-frame@^6.16.0:
+  version "6.26.0"
+  resolved "https://registry.yarnpkg.com/babel-code-frame/-/babel-code-frame-6.26.0.tgz#63fd43f7dc1e3bb7ce35947db8fe369a3f58c74b"
+  dependencies:
+    chalk "^1.1.3"
+    esutils "^2.0.2"
+    js-tokens "^3.0.2"
+
 balanced-match@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/balanced-match/-/balanced-match-1.0.0.tgz#89b4d199ab2bee49de164ea02b89ce462d71b767"
@@ -191,6 +246,20 @@ braces@^1.8.2:
     preserve "^0.2.0"
     repeat-element "^1.1.2"
 
+builtin-modules@^1.1.1:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/builtin-modules/-/builtin-modules-1.1.1.tgz#270f076c5a72c02f5b65a47df94c5fe3a278892f"
+
+caller-path@^0.1.0:
+  version "0.1.0"
+  resolved "https://registry.yarnpkg.com/caller-path/-/caller-path-0.1.0.tgz#94085ef63581ecd3daa92444a8fe94e82577751f"
+  dependencies:
+    callsites "^0.2.0"
+
+callsites@^0.2.0:
+  version "0.2.0"
+  resolved "https://registry.yarnpkg.com/callsites/-/callsites-0.2.0.tgz#afab96262910a7f33c19a5775825c69f34e350ca"
+
 camelcase@^4.0.0:
   version "4.1.0"
   resolved "https://registry.yarnpkg.com/camelcase/-/camelcase-4.1.0.tgz#d545635be1e33c542649c69173e5de6acfae34dd"
@@ -213,7 +282,17 @@ chalk@0.5.1:
     strip-ansi "^0.3.0"
     supports-color "^0.2.0"
 
-chalk@^2.0.1:
+chalk@^1.0.0, chalk@^1.1.1, chalk@^1.1.3:
+  version "1.1.3"
+  resolved "https://registry.yarnpkg.com/chalk/-/chalk-1.1.3.tgz#a8115c55e4a702fe4d150abd3872822a7e09fc98"
+  dependencies:
+    ansi-styles "^2.2.1"
+    escape-string-regexp "^1.0.2"
+    has-ansi "^2.0.0"
+    strip-ansi "^3.0.0"
+    supports-color "^2.0.0"
+
+chalk@^2.0.1, chalk@^2.3.0:
   version "2.3.0"
   resolved "https://registry.yarnpkg.com/chalk/-/chalk-2.3.0.tgz#b5ea48efc9c1793dccc9b4767c93914d3f2d52ba"
   dependencies:
@@ -236,10 +315,24 @@ chokidar@^1.6.0, chokidar@^1.7.0:
   optionalDependencies:
     fsevents "^1.0.0"
 
+circular-json@^0.3.1:
+  version "0.3.3"
+  resolved "https://registry.yarnpkg.com/circular-json/-/circular-json-0.3.3.tgz#815c99ea84f6809529d2f45791bdf82711352d66"
+
 cli-boxes@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/cli-boxes/-/cli-boxes-1.0.0.tgz#4fa917c3e59c94a004cd61f8ee509da651687143"
 
+cli-cursor@^1.0.1:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/cli-cursor/-/cli-cursor-1.0.2.tgz#64da3f7d56a54412e59794bd62dc35295e8f2987"
+  dependencies:
+    restore-cursor "^1.0.1"
+
+cli-width@^2.0.0:
+  version "2.2.0"
+  resolved "https://registry.yarnpkg.com/cli-width/-/cli-width-2.2.0.tgz#ff19ede8a9a5e579324147b0c11f0fbcbabed639"
+
 co@^4.6.0:
   version "4.6.0"
   resolved "https://registry.yarnpkg.com/co/-/co-4.6.0.tgz#6ea6bdf3d853ae54ccb8e47bfa0bf3f9031fb184"
@@ -276,6 +369,14 @@ concat-map@0.0.1:
   version "0.0.1"
   resolved "https://registry.yarnpkg.com/concat-map/-/concat-map-0.0.1.tgz#d8a96bd77fd68df7793a73036a3ba0d5405d477b"
 
+concat-stream@^1.5.2:
+  version "1.6.0"
+  resolved "https://registry.yarnpkg.com/concat-stream/-/concat-stream-1.6.0.tgz#0aac662fd52be78964d5532f694784e70110acf7"
+  dependencies:
+    inherits "^2.0.3"
+    readable-stream "^2.2.2"
+    typedarray "^0.0.6"
+
 concurrently@^3.5.1:
   version "3.5.1"
   resolved "https://registry.yarnpkg.com/concurrently/-/concurrently-3.5.1.tgz#ee8b60018bbe86b02df13e5249453c6ececd2521"
@@ -313,6 +414,10 @@ console-control-strings@^1.0.0, console-control-strings@~1.1.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/console-control-strings/-/console-control-strings-1.1.0.tgz#3d7cf4464db6446ea644bf4b39507f9851008e8e"
 
+contains-path@^0.1.0:
+  version "0.1.0"
+  resolved "https://registry.yarnpkg.com/contains-path/-/contains-path-0.1.0.tgz#fe8cf184ff6670b6baef01a9d4861a5cbec4120a"
+
 core-util-is@1.0.2, core-util-is@~1.0.0:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/core-util-is/-/core-util-is-1.0.2.tgz#b5fd54220aa2bc5ab57aab7140c940754503c1a7"
@@ -348,6 +453,12 @@ crypto-random-string@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/crypto-random-string/-/crypto-random-string-1.0.0.tgz#a230f64f568310e1498009940790ec99545bca7e"
 
+d@1:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/d/-/d-1.0.0.tgz#754bb5bfe55451da69a58b94d45f4c5b0462d58f"
+  dependencies:
+    es5-ext "^0.10.9"
+
 dashdash@^1.12.0:
   version "1.14.1"
   resolved "https://registry.yarnpkg.com/dashdash/-/dashdash-1.14.1.tgz#853cfa0f7cbe2fed5de20326b8dd581035f6e2f0"
@@ -358,7 +469,11 @@ date-fns@^1.23.0:
   version "1.29.0"
   resolved "https://registry.yarnpkg.com/date-fns/-/date-fns-1.29.0.tgz#12e609cdcb935127311d04d33334e2960a2a54e6"
 
-debug@2.6.9, debug@^2.2.0, debug@^2.6.8:
+debug-log@^1.0.0:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/debug-log/-/debug-log-1.0.1.tgz#2307632d4c04382b8df8a32f70b895046d52745f"
+
+debug@2.6.9, debug@^2.1.1, debug@^2.2.0, debug@^2.6.8:
   version "2.6.9"
   resolved "https://registry.yarnpkg.com/debug/-/debug-2.6.9.tgz#5d128515df134ff327e90a4c93f4e077a536341f"
   dependencies:
@@ -374,6 +489,40 @@ deep-extend@~0.4.0:
   version "0.4.2"
   resolved "https://registry.yarnpkg.com/deep-extend/-/deep-extend-0.4.2.tgz#48b699c27e334bf89f10892be432f6e4c7d34a7f"
 
+deep-is@~0.1.3:
+  version "0.1.3"
+  resolved "https://registry.yarnpkg.com/deep-is/-/deep-is-0.1.3.tgz#b369d6fb5dbc13eecf524f91b070feedc357cf34"
+
+define-properties@^1.1.2:
+  version "1.1.2"
+  resolved "https://registry.yarnpkg.com/define-properties/-/define-properties-1.1.2.tgz#83a73f2fea569898fb737193c8f873caf6d45c94"
+  dependencies:
+    foreach "^2.0.5"
+    object-keys "^1.0.8"
+
+deglob@^2.1.0:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/deglob/-/deglob-2.1.0.tgz#4d44abe16ef32c779b4972bd141a80325029a14a"
+  dependencies:
+    find-root "^1.0.0"
+    glob "^7.0.5"
+    ignore "^3.0.9"
+    pkg-config "^1.1.0"
+    run-parallel "^1.1.2"
+    uniq "^1.0.1"
+
+del@^2.0.2:
+  version "2.2.2"
+  resolved "https://registry.yarnpkg.com/del/-/del-2.2.2.tgz#c12c981d067846c84bcaf862cff930d907ffd1a8"
+  dependencies:
+    globby "^5.0.0"
+    is-path-cwd "^1.0.0"
+    is-path-in-cwd "^1.0.0"
+    object-assign "^4.0.1"
+    pify "^2.0.0"
+    pinkie-promise "^2.0.0"
+    rimraf "^2.2.8"
+
 delayed-stream@~1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/delayed-stream/-/delayed-stream-1.0.0.tgz#df3ae199acadfb7d440aaae0b29e2272b24ec619"
@@ -394,6 +543,19 @@ detect-libc@^1.0.2:
   version "1.0.3"
   resolved "https://registry.yarnpkg.com/detect-libc/-/detect-libc-1.0.3.tgz#fa137c4bd698edf55cd5cd02ac559f91a4c4ba9b"
 
+doctrine@1.5.0, doctrine@^1.2.2:
+  version "1.5.0"
+  resolved "https://registry.yarnpkg.com/doctrine/-/doctrine-1.5.0.tgz#379dce730f6166f76cefa4e6707a159b02c5a6fa"
+  dependencies:
+    esutils "^2.0.2"
+    isarray "^1.0.0"
+
+doctrine@^2.0.0:
+  version "2.0.2"
+  resolved "https://registry.yarnpkg.com/doctrine/-/doctrine-2.0.2.tgz#68f96ce8efc56cc42651f1faadb4f175273b0075"
+  dependencies:
+    esutils "^2.0.2"
+
 dot-prop@^4.1.0:
   version "4.2.0"
   resolved "https://registry.yarnpkg.com/dot-prop/-/dot-prop-4.2.0.tgz#1f19e0c2e1aa0e32797c49799f2837ac6af69c57"
@@ -426,22 +588,256 @@ entities@~1.1.1:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/entities/-/entities-1.1.1.tgz#6e5c2d0a5621b5dadaecef80b90edfb5cd7772f0"
 
+error-ex@^1.2.0:
+  version "1.3.1"
+  resolved "https://registry.yarnpkg.com/error-ex/-/error-ex-1.3.1.tgz#f855a86ce61adc4e8621c3cda21e7a7612c3a8dc"
+  dependencies:
+    is-arrayish "^0.2.1"
+
+es-abstract@^1.7.0:
+  version "1.10.0"
+  resolved "https://registry.yarnpkg.com/es-abstract/-/es-abstract-1.10.0.tgz#1ecb36c197842a00d8ee4c2dfd8646bb97d60864"
+  dependencies:
+    es-to-primitive "^1.1.1"
+    function-bind "^1.1.1"
+    has "^1.0.1"
+    is-callable "^1.1.3"
+    is-regex "^1.0.4"
+
+es-to-primitive@^1.1.1:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/es-to-primitive/-/es-to-primitive-1.1.1.tgz#45355248a88979034b6792e19bb81f2b7975dd0d"
+  dependencies:
+    is-callable "^1.1.1"
+    is-date-object "^1.0.1"
+    is-symbol "^1.0.1"
+
+es5-ext@^0.10.14, es5-ext@^0.10.35, es5-ext@^0.10.9, es5-ext@~0.10.14:
+  version "0.10.37"
+  resolved "https://registry.yarnpkg.com/es5-ext/-/es5-ext-0.10.37.tgz#0ee741d148b80069ba27d020393756af257defc3"
+  dependencies:
+    es6-iterator "~2.0.1"
+    es6-symbol "~3.1.1"
+
+es6-iterator@^2.0.1, es6-iterator@~2.0.1:
+  version "2.0.3"
+  resolved "https://registry.yarnpkg.com/es6-iterator/-/es6-iterator-2.0.3.tgz#a7de889141a05a94b0854403b2d0a0fbfa98f3b7"
+  dependencies:
+    d "1"
+    es5-ext "^0.10.35"
+    es6-symbol "^3.1.1"
+
+es6-map@^0.1.3:
+  version "0.1.5"
+  resolved "https://registry.yarnpkg.com/es6-map/-/es6-map-0.1.5.tgz#9136e0503dcc06a301690f0bb14ff4e364e949f0"
+  dependencies:
+    d "1"
+    es5-ext "~0.10.14"
+    es6-iterator "~2.0.1"
+    es6-set "~0.1.5"
+    es6-symbol "~3.1.1"
+    event-emitter "~0.3.5"
+
 es6-promise@^3.3.1:
   version "3.3.1"
   resolved "https://registry.yarnpkg.com/es6-promise/-/es6-promise-3.3.1.tgz#a08cdde84ccdbf34d027a1451bc91d4bcd28a613"
 
+es6-set@~0.1.5:
+  version "0.1.5"
+  resolved "https://registry.yarnpkg.com/es6-set/-/es6-set-0.1.5.tgz#d2b3ec5d4d800ced818db538d28974db0a73ccb1"
+  dependencies:
+    d "1"
+    es5-ext "~0.10.14"
+    es6-iterator "~2.0.1"
+    es6-symbol "3.1.1"
+    event-emitter "~0.3.5"
+
+es6-symbol@3.1.1, es6-symbol@^3.1.1, es6-symbol@~3.1.1:
+  version "3.1.1"
+  resolved "https://registry.yarnpkg.com/es6-symbol/-/es6-symbol-3.1.1.tgz#bf00ef4fdab6ba1b46ecb7b629b4c7ed5715cc77"
+  dependencies:
+    d "1"
+    es5-ext "~0.10.14"
+
+es6-weak-map@^2.0.1:
+  version "2.0.2"
+  resolved "https://registry.yarnpkg.com/es6-weak-map/-/es6-weak-map-2.0.2.tgz#5e3ab32251ffd1538a1f8e5ffa1357772f92d96f"
+  dependencies:
+    d "1"
+    es5-ext "^0.10.14"
+    es6-iterator "^2.0.1"
+    es6-symbol "^3.1.1"
+
 escape-html@~1.0.3:
   version "1.0.3"
   resolved "https://registry.yarnpkg.com/escape-html/-/escape-html-1.0.3.tgz#0258eae4d3d0c0974de1c169188ef0051d1d1988"
 
-escape-string-regexp@^1.0.0, escape-string-regexp@^1.0.5:
+escape-string-regexp@^1.0.0, escape-string-regexp@^1.0.2, escape-string-regexp@^1.0.5:
   version "1.0.5"
   resolved "https://registry.yarnpkg.com/escape-string-regexp/-/escape-string-regexp-1.0.5.tgz#1b61c0562190a8dff6ae3bb2cf0200ca130b86d4"
 
+escope@^3.6.0:
+  version "3.6.0"
+  resolved "https://registry.yarnpkg.com/escope/-/escope-3.6.0.tgz#e01975e812781a163a6dadfdd80398dc64c889c3"
+  dependencies:
+    es6-map "^0.1.3"
+    es6-weak-map "^2.0.1"
+    esrecurse "^4.1.0"
+    estraverse "^4.1.1"
+
+eslint-config-semistandard@^11.0.0:
+  version "11.0.0"
+  resolved "https://registry.yarnpkg.com/eslint-config-semistandard/-/eslint-config-semistandard-11.0.0.tgz#44eef7cfdfd47219e3a7b81b91b540e880bb2615"
+
+eslint-config-standard-jsx@4.0.1:
+  version "4.0.1"
+  resolved "https://registry.yarnpkg.com/eslint-config-standard-jsx/-/eslint-config-standard-jsx-4.0.1.tgz#cd4e463d0268e2d9e707f61f42f73f5b3333c642"
+
+eslint-config-standard@^10.2.1:
+  version "10.2.1"
+  resolved "https://registry.yarnpkg.com/eslint-config-standard/-/eslint-config-standard-10.2.1.tgz#c061e4d066f379dc17cd562c64e819b4dd454591"
+
+eslint-import-resolver-node@^0.2.0:
+  version "0.2.3"
+  resolved "https://registry.yarnpkg.com/eslint-import-resolver-node/-/eslint-import-resolver-node-0.2.3.tgz#5add8106e8c928db2cba232bcd9efa846e3da16c"
+  dependencies:
+    debug "^2.2.0"
+    object-assign "^4.0.1"
+    resolve "^1.1.6"
+
+eslint-module-utils@^2.0.0:
+  version "2.1.1"
+  resolved "https://registry.yarnpkg.com/eslint-module-utils/-/eslint-module-utils-2.1.1.tgz#abaec824177613b8a95b299639e1b6facf473449"
+  dependencies:
+    debug "^2.6.8"
+    pkg-dir "^1.0.0"
+
+eslint-plugin-import@~2.2.0:
+  version "2.2.0"
+  resolved "https://registry.yarnpkg.com/eslint-plugin-import/-/eslint-plugin-import-2.2.0.tgz#72ba306fad305d67c4816348a4699a4229ac8b4e"
+  dependencies:
+    builtin-modules "^1.1.1"
+    contains-path "^0.1.0"
+    debug "^2.2.0"
+    doctrine "1.5.0"
+    eslint-import-resolver-node "^0.2.0"
+    eslint-module-utils "^2.0.0"
+    has "^1.0.1"
+    lodash.cond "^4.3.0"
+    minimatch "^3.0.3"
+    pkg-up "^1.0.0"
+
+eslint-plugin-node@~4.2.2:
+  version "4.2.3"
+  resolved "https://registry.yarnpkg.com/eslint-plugin-node/-/eslint-plugin-node-4.2.3.tgz#c04390ab8dbcbb6887174023d6f3a72769e63b97"
+  dependencies:
+    ignore "^3.0.11"
+    minimatch "^3.0.2"
+    object-assign "^4.0.1"
+    resolve "^1.1.7"
+    semver "5.3.0"
+
+eslint-plugin-promise@~3.5.0:
+  version "3.5.0"
+  resolved "https://registry.yarnpkg.com/eslint-plugin-promise/-/eslint-plugin-promise-3.5.0.tgz#78fbb6ffe047201627569e85a6c5373af2a68fca"
+
+eslint-plugin-react@~6.10.0:
+  version "6.10.3"
+  resolved "https://registry.yarnpkg.com/eslint-plugin-react/-/eslint-plugin-react-6.10.3.tgz#c5435beb06774e12c7db2f6abaddcbf900cd3f78"
+  dependencies:
+    array.prototype.find "^2.0.1"
+    doctrine "^1.2.2"
+    has "^1.0.1"
+    jsx-ast-utils "^1.3.4"
+    object.assign "^4.0.4"
+
+eslint-plugin-standard@~3.0.1:
+  version "3.0.1"
+  resolved "https://registry.yarnpkg.com/eslint-plugin-standard/-/eslint-plugin-standard-3.0.1.tgz#34d0c915b45edc6f010393c7eef3823b08565cf2"
+
+eslint@~3.19.0:
+  version "3.19.0"
+  resolved "https://registry.yarnpkg.com/eslint/-/eslint-3.19.0.tgz#c8fc6201c7f40dd08941b87c085767386a679acc"
+  dependencies:
+    babel-code-frame "^6.16.0"
+    chalk "^1.1.3"
+    concat-stream "^1.5.2"
+    debug "^2.1.1"
+    doctrine "^2.0.0"
+    escope "^3.6.0"
+    espree "^3.4.0"
+    esquery "^1.0.0"
+    estraverse "^4.2.0"
+    esutils "^2.0.2"
+    file-entry-cache "^2.0.0"
+    glob "^7.0.3"
+    globals "^9.14.0"
+    ignore "^3.2.0"
+    imurmurhash "^0.1.4"
+    inquirer "^0.12.0"
+    is-my-json-valid "^2.10.0"
+    is-resolvable "^1.0.0"
+    js-yaml "^3.5.1"
+    json-stable-stringify "^1.0.0"
+    levn "^0.3.0"
+    lodash "^4.0.0"
+    mkdirp "^0.5.0"
+    natural-compare "^1.4.0"
+    optionator "^0.8.2"
+    path-is-inside "^1.0.1"
+    pluralize "^1.2.1"
+    progress "^1.1.8"
+    require-uncached "^1.0.2"
+    shelljs "^0.7.5"
+    strip-bom "^3.0.0"
+    strip-json-comments "~2.0.1"
+    table "^3.7.8"
+    text-table "~0.2.0"
+    user-home "^2.0.0"
+
+espree@^3.4.0:
+  version "3.5.2"
+  resolved "https://registry.yarnpkg.com/espree/-/espree-3.5.2.tgz#756ada8b979e9dcfcdb30aad8d1a9304a905e1ca"
+  dependencies:
+    acorn "^5.2.1"
+    acorn-jsx "^3.0.0"
+
+esprima@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/esprima/-/esprima-4.0.0.tgz#4499eddcd1110e0b218bacf2fa7f7f59f55ca804"
+
+esquery@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/esquery/-/esquery-1.0.0.tgz#cfba8b57d7fba93f17298a8a006a04cda13d80fa"
+  dependencies:
+    estraverse "^4.0.0"
+
+esrecurse@^4.1.0:
+  version "4.2.0"
+  resolved "https://registry.yarnpkg.com/esrecurse/-/esrecurse-4.2.0.tgz#fa9568d98d3823f9a41d91e902dcab9ea6e5b163"
+  dependencies:
+    estraverse "^4.1.0"
+    object-assign "^4.0.1"
+
+estraverse@^4.0.0, estraverse@^4.1.0, estraverse@^4.1.1, estraverse@^4.2.0:
+  version "4.2.0"
+  resolved "https://registry.yarnpkg.com/estraverse/-/estraverse-4.2.0.tgz#0dee3fed31fcd469618ce7342099fc1afa0bdb13"
+
+esutils@^2.0.2:
+  version "2.0.2"
+  resolved "https://registry.yarnpkg.com/esutils/-/esutils-2.0.2.tgz#0abf4f1caa5bcb1f7a9d8acc6dea4faaa04bac9b"
+
 etag@~1.8.1:
   version "1.8.1"
   resolved "https://registry.yarnpkg.com/etag/-/etag-1.8.1.tgz#41ae2eeb65efa62268aebfea83ac7d79299b0887"
 
+event-emitter@~0.3.5:
+  version "0.3.5"
+  resolved "https://registry.yarnpkg.com/event-emitter/-/event-emitter-0.3.5.tgz#df8c69eef1647923c7157b9ce83840610b02cc39"
+  dependencies:
+    d "1"
+    es5-ext "~0.10.14"
+
 event-stream@latest, event-stream@~3.3.0:
   version "3.3.4"
   resolved "https://registry.yarnpkg.com/event-stream/-/event-stream-3.3.4.tgz#4ab4c9a0f5a54db9338b4c34d86bfce8f4b35571"
@@ -466,6 +862,10 @@ execa@^0.7.0:
     signal-exit "^3.0.0"
     strip-eof "^1.0.0"
 
+exit-hook@^1.0.0:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/exit-hook/-/exit-hook-1.1.1.tgz#f05ca233b48c05d54fff07765df8507e95c02ff8"
+
 expand-brackets@^0.1.4:
   version "0.1.5"
   resolved "https://registry.yarnpkg.com/expand-brackets/-/expand-brackets-0.1.5.tgz#df07284e342a807cd733ac5af72411e581d1177b"
@@ -492,12 +892,30 @@ extsprintf@1.3.0, extsprintf@^1.2.0:
   version "1.3.0"
   resolved "https://registry.yarnpkg.com/extsprintf/-/extsprintf-1.3.0.tgz#96918440e3041a7a414f8c52e3c574eb3c3e1e05"
 
+fast-levenshtein@~2.0.4:
+  version "2.0.6"
+  resolved "https://registry.yarnpkg.com/fast-levenshtein/-/fast-levenshtein-2.0.6.tgz#3d8a5c66883a16a30ca8643e851f19baa7797917"
+
 faye-websocket@0.11.x:
   version "0.11.1"
   resolved "https://registry.yarnpkg.com/faye-websocket/-/faye-websocket-0.11.1.tgz#f0efe18c4f56e4f40afc7e06c719fd5ee6188f38"
   dependencies:
     websocket-driver ">=0.5.1"
 
+figures@^1.3.5:
+  version "1.7.0"
+  resolved "https://registry.yarnpkg.com/figures/-/figures-1.7.0.tgz#cbe1e3affcf1cd44b80cadfed28dc793a9701d2e"
+  dependencies:
+    escape-string-regexp "^1.0.5"
+    object-assign "^4.1.0"
+
+file-entry-cache@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/file-entry-cache/-/file-entry-cache-2.0.0.tgz#c392990c3e684783d838b8c84a45d8a048458361"
+  dependencies:
+    flat-cache "^1.2.1"
+    object-assign "^4.0.1"
+
 filename-regex@^2.0.0:
   version "2.0.1"
   resolved "https://registry.yarnpkg.com/filename-regex/-/filename-regex-2.0.1.tgz#c1c4b9bee3e09725ddb106b75c1e301fe2f18b26"
@@ -522,6 +940,32 @@ finalhandler@0.5.1:
     statuses "~1.3.1"
     unpipe "~1.0.0"
 
+find-root@^1.0.0:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/find-root/-/find-root-1.1.0.tgz#abcfc8ba76f708c42a97b3d685b7e9450bfb9ce4"
+
+find-up@^1.0.0:
+  version "1.1.2"
+  resolved "https://registry.yarnpkg.com/find-up/-/find-up-1.1.2.tgz#6b2e9822b1a2ce0a60ab64d610eccad53cb24d0f"
+  dependencies:
+    path-exists "^2.0.0"
+    pinkie-promise "^2.0.0"
+
+find-up@^2.0.0:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/find-up/-/find-up-2.1.0.tgz#45d1b7e506c717ddd482775a2b77920a3c0c57a7"
+  dependencies:
+    locate-path "^2.0.0"
+
+flat-cache@^1.2.1:
+  version "1.3.0"
+  resolved "https://registry.yarnpkg.com/flat-cache/-/flat-cache-1.3.0.tgz#d3030b32b38154f4e3b7e9c709f490f7ef97c481"
+  dependencies:
+    circular-json "^0.3.1"
+    del "^2.0.2"
+    graceful-fs "^4.1.2"
+    write "^0.2.1"
+
 for-in@^1.0.1:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/for-in/-/for-in-1.0.2.tgz#81068d295a8142ec0ac726c6e2200c30fb6d5e80"
@@ -532,6 +976,10 @@ for-own@^0.1.4:
   dependencies:
     for-in "^1.0.1"
 
+foreach@^2.0.5:
+  version "2.0.5"
+  resolved "https://registry.yarnpkg.com/foreach/-/foreach-2.0.5.tgz#0bee005018aeb260d0a3af3ae658dd0136ec1b99"
+
 forever-agent@~0.6.1:
   version "0.6.1"
   resolved "https://registry.yarnpkg.com/forever-agent/-/forever-agent-0.6.1.tgz#fbc71f0c41adeb37f96c577ad1ed42d8fdacca91"
@@ -588,6 +1036,10 @@ fstream@^1.0.0, fstream@^1.0.10, fstream@^1.0.2:
     mkdirp ">=0.5 0"
     rimraf "2"
 
+function-bind@^1.0.2, function-bind@^1.1.0, function-bind@^1.1.1:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/function-bind/-/function-bind-1.1.1.tgz#a56899d3ea3c9bab874bb9773b7c5ede92f4895d"
+
 gauge@~2.7.3:
   version "2.7.4"
   resolved "https://registry.yarnpkg.com/gauge/-/gauge-2.7.4.tgz#2c03405c7538c39d7eb37b317022e325fb018bf7"
@@ -601,6 +1053,20 @@ gauge@~2.7.3:
     strip-ansi "^3.0.1"
     wide-align "^1.1.0"
 
+generate-function@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/generate-function/-/generate-function-2.0.0.tgz#6858fe7c0969b7d4e9093337647ac79f60dfbe74"
+
+generate-object-property@^1.1.0:
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/generate-object-property/-/generate-object-property-1.2.0.tgz#9c0e1c40308ce804f4783618b937fa88f99d50d0"
+  dependencies:
+    is-property "^1.0.0"
+
+get-stdin@^5.0.1:
+  version "5.0.1"
+  resolved "https://registry.yarnpkg.com/get-stdin/-/get-stdin-5.0.1.tgz#122e161591e21ff4c52530305693f20e6393a398"
+
 get-stream@^3.0.0:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/get-stream/-/get-stream-3.0.0.tgz#8e943d1358dc37555054ecbe2edb05aa174ede14"
@@ -624,7 +1090,7 @@ glob-parent@^2.0.0:
   dependencies:
     is-glob "^2.0.0"
 
-glob@^7.0.5:
+glob@^7.0.0, glob@^7.0.3, glob@^7.0.5:
   version "7.1.2"
   resolved "https://registry.yarnpkg.com/glob/-/glob-7.1.2.tgz#c19c9df9a028702d678612384a6552404c636d15"
   dependencies:
@@ -641,6 +1107,21 @@ global-dirs@^0.1.0:
   dependencies:
     ini "^1.3.4"
 
+globals@^9.14.0:
+  version "9.18.0"
+  resolved "https://registry.yarnpkg.com/globals/-/globals-9.18.0.tgz#aa3896b3e69b487f17e31ed2143d69a8e30c2d8a"
+
+globby@^5.0.0:
+  version "5.0.0"
+  resolved "https://registry.yarnpkg.com/globby/-/globby-5.0.0.tgz#ebd84667ca0dbb330b99bcfc68eac2bc54370e0d"
+  dependencies:
+    array-union "^1.0.1"
+    arrify "^1.0.0"
+    glob "^7.0.3"
+    object-assign "^4.0.1"
+    pify "^2.0.0"
+    pinkie-promise "^2.0.0"
+
 got@^6.7.1:
   version "6.7.1"
   resolved "https://registry.yarnpkg.com/got/-/got-6.7.1.tgz#240cd05785a9a18e561dc1b44b41c763ef1e8db0"
@@ -678,6 +1159,12 @@ has-ansi@^0.1.0:
   dependencies:
     ansi-regex "^0.2.0"
 
+has-ansi@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/has-ansi/-/has-ansi-2.0.0.tgz#34f5049ce1ecdf2b0649af3ef24e45ed35416d91"
+  dependencies:
+    ansi-regex "^2.0.0"
+
 has-flag@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/has-flag/-/has-flag-1.0.0.tgz#9d9e793165ce017a00f00418c43f942a7b1d11fa"
@@ -690,6 +1177,12 @@ has-unicode@^2.0.0:
   version "2.0.1"
   resolved "https://registry.yarnpkg.com/has-unicode/-/has-unicode-2.0.1.tgz#e0e6fe6a28cf51138855e086d1691e771de2a8b9"
 
+has@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/has/-/has-1.0.1.tgz#8461733f538b0837c9361e39a9ab9e9704dc2f28"
+  dependencies:
+    function-bind "^1.0.2"
+
 hawk@3.1.3, hawk@~3.1.3:
   version "3.1.3"
   resolved "https://registry.yarnpkg.com/hawk/-/hawk-3.1.3.tgz#078444bd7c1640b0fe540d2c9b73d59678e8e1c4"
@@ -737,6 +1230,10 @@ ignore-by-default@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/ignore-by-default/-/ignore-by-default-1.0.1.tgz#48ca6d72f6c6a3af00a9ad4ae6876be3889e2b09"
 
+ignore@^3.0.11, ignore@^3.0.9, ignore@^3.2.0:
+  version "3.3.7"
+  resolved "https://registry.yarnpkg.com/ignore/-/ignore-3.3.7.tgz#612289bfb3c220e186a58118618d5be8c1bab021"
+
 import-lazy@^2.1.0:
   version "2.1.0"
   resolved "https://registry.yarnpkg.com/import-lazy/-/import-lazy-2.1.0.tgz#05698e3d45c88e8d7e9d92cb0584e77f096f3e43"
@@ -752,7 +1249,7 @@ inflight@^1.0.4:
     once "^1.3.0"
     wrappy "1"
 
-inherits@2, inherits@2.0.3, inherits@^2.0.1, inherits@~2.0.0, inherits@~2.0.3:
+inherits@2, inherits@2.0.3, inherits@^2.0.1, inherits@^2.0.3, inherits@~2.0.0, inherits@~2.0.3:
   version "2.0.3"
   resolved "https://registry.yarnpkg.com/inherits/-/inherits-2.0.3.tgz#633c2c83e3da42a502f52466022480f4208261de"
 
@@ -760,6 +1257,32 @@ ini@^1.3.4, ini@~1.3.0:
   version "1.3.5"
   resolved "https://registry.yarnpkg.com/ini/-/ini-1.3.5.tgz#eee25f56db1c9ec6085e0c22778083f596abf927"
 
+inquirer@^0.12.0:
+  version "0.12.0"
+  resolved "https://registry.yarnpkg.com/inquirer/-/inquirer-0.12.0.tgz#1ef2bfd63504df0bc75785fff8c2c41df12f077e"
+  dependencies:
+    ansi-escapes "^1.1.0"
+    ansi-regex "^2.0.0"
+    chalk "^1.0.0"
+    cli-cursor "^1.0.1"
+    cli-width "^2.0.0"
+    figures "^1.3.5"
+    lodash "^4.3.0"
+    readline2 "^1.0.1"
+    run-async "^0.1.0"
+    rx-lite "^3.1.2"
+    string-width "^1.0.1"
+    strip-ansi "^3.0.0"
+    through "^2.3.6"
+
+interpret@^1.0.0:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/interpret/-/interpret-1.1.0.tgz#7ed1b1410c6a0e0f78cf95d3b8440c63f78b8614"
+
+is-arrayish@^0.2.1:
+  version "0.2.1"
+  resolved "https://registry.yarnpkg.com/is-arrayish/-/is-arrayish-0.2.1.tgz#77c99840527aa8ecb1a8ba697b80645a7a926a9d"
+
 is-binary-path@^1.0.0:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/is-binary-path/-/is-binary-path-1.0.1.tgz#75f16642b480f187a711c814161fd3a4a7655898"
@@ -770,6 +1293,14 @@ is-buffer@^1.1.5:
   version "1.1.6"
   resolved "https://registry.yarnpkg.com/is-buffer/-/is-buffer-1.1.6.tgz#efaa2ea9daa0d7ab2ea13a97b2b8ad51fefbe8be"
 
+is-callable@^1.1.1, is-callable@^1.1.3:
+  version "1.1.3"
+  resolved "https://registry.yarnpkg.com/is-callable/-/is-callable-1.1.3.tgz#86eb75392805ddc33af71c92a0eedf74ee7604b2"
+
+is-date-object@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/is-date-object/-/is-date-object-1.0.1.tgz#9aa20eb6aeebbff77fbd33e74ca01b33581d3a16"
+
 is-dotfile@^1.0.0:
   version "1.0.3"
   resolved "https://registry.yarnpkg.com/is-dotfile/-/is-dotfile-1.0.3.tgz#a6a2f32ffd2dfb04f5ca25ecd0f6b83cf798a1e1"
@@ -811,6 +1342,15 @@ is-installed-globally@^0.1.0:
     global-dirs "^0.1.0"
     is-path-inside "^1.0.0"
 
+is-my-json-valid@^2.10.0:
+  version "2.16.1"
+  resolved "https://registry.yarnpkg.com/is-my-json-valid/-/is-my-json-valid-2.16.1.tgz#5a846777e2c2620d1e69104e5d3a03b1f6088f11"
+  dependencies:
+    generate-function "^2.0.0"
+    generate-object-property "^1.1.0"
+    jsonpointer "^4.0.0"
+    xtend "^4.0.0"
+
 is-npm@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/is-npm/-/is-npm-1.0.0.tgz#f2fb63a65e4905b406c86072765a1a4dc793b9f4"
@@ -831,6 +1371,16 @@ is-obj@^1.0.0:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/is-obj/-/is-obj-1.0.1.tgz#3e4729ac1f5fde025cd7d83a896dab9f4f67db0f"
 
+is-path-cwd@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/is-path-cwd/-/is-path-cwd-1.0.0.tgz#d225ec23132e89edd38fda767472e62e65f1106d"
+
+is-path-in-cwd@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/is-path-in-cwd/-/is-path-in-cwd-1.0.0.tgz#6477582b8214d602346094567003be8a9eac04dc"
+  dependencies:
+    is-path-inside "^1.0.0"
+
 is-path-inside@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/is-path-inside/-/is-path-inside-1.0.0.tgz#fc06e5a1683fbda13de667aff717bbc10a48f37f"
@@ -845,10 +1395,24 @@ is-primitive@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/is-primitive/-/is-primitive-2.0.0.tgz#207bab91638499c07b2adf240a41a87210034575"
 
+is-property@^1.0.0:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/is-property/-/is-property-1.0.2.tgz#57fe1c4e48474edd65b09911f26b1cd4095dda84"
+
 is-redirect@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/is-redirect/-/is-redirect-1.0.0.tgz#1d03dded53bd8db0f30c26e4f95d36fc7c87dc24"
 
+is-regex@^1.0.4:
+  version "1.0.4"
+  resolved "https://registry.yarnpkg.com/is-regex/-/is-regex-1.0.4.tgz#5517489b547091b0930e095654ced25ee97e9491"
+  dependencies:
+    has "^1.0.1"
+
+is-resolvable@^1.0.0:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/is-resolvable/-/is-resolvable-1.0.1.tgz#acca1cd36dbe44b974b924321555a70ba03b1cf4"
+
 is-retry-allowed@^1.0.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/is-retry-allowed/-/is-retry-allowed-1.1.0.tgz#11a060568b67339444033d0125a61a20d564fb34"
@@ -857,6 +1421,10 @@ is-stream@^1.0.0, is-stream@^1.1.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/is-stream/-/is-stream-1.1.0.tgz#12d4a3dd4e68e0b79ceb8dbc84173ae80d91ca44"
 
+is-symbol@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/is-symbol/-/is-symbol-1.0.1.tgz#3cc59f00025194b6ab2e38dbae6689256b660572"
+
 is-typedarray@~1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/is-typedarray/-/is-typedarray-1.0.0.tgz#e479c80858df0c1b11ddda6940f96011fcda4a9a"
@@ -865,7 +1433,7 @@ is-wsl@^1.1.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/is-wsl/-/is-wsl-1.1.0.tgz#1f16e4aa22b04d1336b66188a66af3c600c3a66d"
 
-isarray@1.0.0, isarray@~1.0.0:
+isarray@1.0.0, isarray@^1.0.0, isarray@~1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/isarray/-/isarray-1.0.0.tgz#bb935d48582cba168c06834957a54a3e07124f11"
 
@@ -883,6 +1451,17 @@ isstream@~0.1.2:
   version "0.1.2"
   resolved "https://registry.yarnpkg.com/isstream/-/isstream-0.1.2.tgz#47e63f7af55afa6f92e1500e690eb8b8529c099a"
 
+js-tokens@^3.0.2:
+  version "3.0.2"
+  resolved "https://registry.yarnpkg.com/js-tokens/-/js-tokens-3.0.2.tgz#9866df395102130e38f7f996bceb65443209c25b"
+
+js-yaml@^3.5.1:
+  version "3.10.0"
+  resolved "https://registry.yarnpkg.com/js-yaml/-/js-yaml-3.10.0.tgz#2e78441646bd4682e963f22b6e92823c309c62dc"
+  dependencies:
+    argparse "^1.0.7"
+    esprima "^4.0.0"
+
 jsbn@~0.1.0:
   version "0.1.1"
   resolved "https://registry.yarnpkg.com/jsbn/-/jsbn-0.1.1.tgz#a5e654c2e5a2deb5f201d96cefbca80c0ef2f513"
@@ -891,7 +1470,7 @@ json-schema@0.2.3:
   version "0.2.3"
   resolved "https://registry.yarnpkg.com/json-schema/-/json-schema-0.2.3.tgz#b480c892e59a2f05954ce727bd3f2a4e882f9e13"
 
-json-stable-stringify@^1.0.1:
+json-stable-stringify@^1.0.0, json-stable-stringify@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/json-stable-stringify/-/json-stable-stringify-1.0.1.tgz#9a759d39c5f2ff503fd5300646ed445f88c4f9af"
   dependencies:
@@ -911,6 +1490,10 @@ jsonify@~0.0.0:
   version "0.0.0"
   resolved "https://registry.yarnpkg.com/jsonify/-/jsonify-0.0.0.tgz#2c74b6ee41d93ca51b7b5aaee8f503631d252a73"
 
+jsonpointer@^4.0.0:
+  version "4.0.1"
+  resolved "https://registry.yarnpkg.com/jsonpointer/-/jsonpointer-4.0.1.tgz#4fd92cb34e0e9db3c89c8622ecf51f9b978c6cb9"
+
 jsprim@^1.2.2:
   version "1.4.1"
   resolved "https://registry.yarnpkg.com/jsprim/-/jsprim-1.4.1.tgz#313e66bc1e5cc06e438bc1b7499c2e5c56acb6a2"
@@ -920,6 +1503,10 @@ jsprim@^1.2.2:
     json-schema "0.2.3"
     verror "1.10.0"
 
+jsx-ast-utils@^1.3.4:
+  version "1.4.1"
+  resolved "https://registry.yarnpkg.com/jsx-ast-utils/-/jsx-ast-utils-1.4.1.tgz#3867213e8dd79bf1e8f2300c0cfc1efb182c0df1"
+
 kind-of@^3.0.2:
   version "3.2.2"
   resolved "https://registry.yarnpkg.com/kind-of/-/kind-of-3.2.2.tgz#31ea21a734bab9bbb0f32466d893aea51e4a3c64"
@@ -938,6 +1525,13 @@ latest-version@^3.0.0:
   dependencies:
     package-json "^4.0.0"
 
+levn@^0.3.0, levn@~0.3.0:
+  version "0.3.0"
+  resolved "https://registry.yarnpkg.com/levn/-/levn-0.3.0.tgz#3b09924edf9f083c0490fdd4c0bc4421e04764ee"
+  dependencies:
+    prelude-ls "~1.1.2"
+    type-check "~0.3.2"
+
 linkify-it@^2.0.0:
   version "2.0.3"
   resolved "https://registry.yarnpkg.com/linkify-it/-/linkify-it-2.0.3.tgz#d94a4648f9b1c179d64fa97291268bdb6ce9434f"
@@ -962,6 +1556,22 @@ live-server@^1.2.0:
     send latest
     serve-index "^1.7.2"
 
+load-json-file@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/load-json-file/-/load-json-file-2.0.0.tgz#7947e42149af80d696cbf797bcaabcfe1fe29ca8"
+  dependencies:
+    graceful-fs "^4.1.2"
+    parse-json "^2.2.0"
+    pify "^2.0.0"
+    strip-bom "^3.0.0"
+
+locate-path@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/locate-path/-/locate-path-2.0.0.tgz#2b568b265eec944c6d9c0de9c3dbbbca0354cd8e"
+  dependencies:
+    p-locate "^2.0.0"
+    path-exists "^3.0.0"
+
 lodash._baseassign@^3.0.0:
   version "3.2.0"
   resolved "https://registry.yarnpkg.com/lodash._baseassign/-/lodash._baseassign-3.2.0.tgz#8c38a099500f215ad09e59f1722fd0c52bfe0a4e"
@@ -1001,6 +1611,10 @@ lodash.assign@^3.0.0:
     lodash._createassigner "^3.0.0"
     lodash.keys "^3.0.0"
 
+lodash.cond@^4.3.0:
+  version "4.5.2"
+  resolved "https://registry.yarnpkg.com/lodash.cond/-/lodash.cond-4.5.2.tgz#f471a1da486be60f6ab955d17115523dd1d255d5"
+
 lodash.defaults@^3.1.2:
   version "3.1.2"
   resolved "https://registry.yarnpkg.com/lodash.defaults/-/lodash.defaults-3.1.2.tgz#c7308b18dbf8bc9372d701a73493c61192bd2e2c"
@@ -1028,7 +1642,7 @@ lodash.restparam@^3.0.0:
   version "3.6.1"
   resolved "https://registry.yarnpkg.com/lodash.restparam/-/lodash.restparam-3.6.1.tgz#936a4e309ef330a7645ed4145986c85ae5b20805"
 
-lodash@^4.5.1:
+lodash@^4.0.0, lodash@^4.3.0, lodash@^4.5.1:
   version "4.17.4"
   resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.4.tgz#78203a4d1c328ae1d86dca6460e369b57f4055ae"
 
@@ -1099,7 +1713,7 @@ mime@1.4.1:
   version "1.4.1"
   resolved "https://registry.yarnpkg.com/mime/-/mime-1.4.1.tgz#121f9ebc49e3766f311a76e1fa1c8003c4b03aa6"
 
-minimatch@^3.0.0, minimatch@^3.0.2, minimatch@^3.0.4:
+minimatch@^3.0.0, minimatch@^3.0.2, minimatch@^3.0.3, minimatch@^3.0.4:
   version "3.0.4"
   resolved "https://registry.yarnpkg.com/minimatch/-/minimatch-3.0.4.tgz#5166e286457f03306064be5497e8dbb0c3d32083"
   dependencies:
@@ -1109,11 +1723,11 @@ minimist@0.0.8:
   version "0.0.8"
   resolved "https://registry.yarnpkg.com/minimist/-/minimist-0.0.8.tgz#857fcabfc3397d2625b8228262e86aa7a011b05d"
 
-minimist@^1.2.0:
+minimist@^1.1.0, minimist@^1.2.0:
   version "1.2.0"
   resolved "https://registry.yarnpkg.com/minimist/-/minimist-1.2.0.tgz#a35008b20f41383eec1fb914f4cd5df79a264284"
 
-"mkdirp@>=0.5 0", mkdirp@^0.5.1:
+"mkdirp@>=0.5 0", mkdirp@^0.5.0, mkdirp@^0.5.1:
   version "0.5.1"
   resolved "https://registry.yarnpkg.com/mkdirp/-/mkdirp-0.5.1.tgz#30057438eac6cf7f8c4767f38648d6697d75c903"
   dependencies:
@@ -1137,10 +1751,18 @@ ms@2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/ms/-/ms-2.0.0.tgz#5608aeadfc00be6c2901df5f9861788de0d597c8"
 
+mute-stream@0.0.5:
+  version "0.0.5"
+  resolved "https://registry.yarnpkg.com/mute-stream/-/mute-stream-0.0.5.tgz#8fbfabb0a98a253d3184331f9e8deb7372fac6c0"
+
 nan@^2.3.0:
   version "2.8.0"
   resolved "https://registry.yarnpkg.com/nan/-/nan-2.8.0.tgz#ed715f3fe9de02b57a5e6252d90a96675e1f085a"
 
+natural-compare@^1.4.0:
+  version "1.4.0"
+  resolved "https://registry.yarnpkg.com/natural-compare/-/natural-compare-1.4.0.tgz#4abebfeed7541f2c27acfb29bdbbd15c8d5ba4f7"
+
 negotiator@0.6.1:
   version "0.6.1"
   resolved "https://registry.yarnpkg.com/negotiator/-/negotiator-0.6.1.tgz#2b327184e8992101177b28563fb5e7102acd0ca9"
@@ -1218,10 +1840,22 @@ oauth-sign@~0.8.1:
   version "0.8.2"
   resolved "https://registry.yarnpkg.com/oauth-sign/-/oauth-sign-0.8.2.tgz#46a6ab7f0aead8deae9ec0565780b7d4efeb9d43"
 
-object-assign@^4, object-assign@^4.1.0, object-assign@latest:
+object-assign@^4, object-assign@^4.0.1, object-assign@^4.1.0, object-assign@latest:
   version "4.1.1"
   resolved "https://registry.yarnpkg.com/object-assign/-/object-assign-4.1.1.tgz#2109adc7965887cfc05cbbd442cac8bfbb360863"
 
+object-keys@^1.0.10, object-keys@^1.0.8:
+  version "1.0.11"
+  resolved "https://registry.yarnpkg.com/object-keys/-/object-keys-1.0.11.tgz#c54601778ad560f1142ce0e01bcca8b56d13426d"
+
+object.assign@^4.0.4:
+  version "4.0.4"
+  resolved "https://registry.yarnpkg.com/object.assign/-/object.assign-4.0.4.tgz#b1c9cc044ef1b9fe63606fc141abbb32e14730cc"
+  dependencies:
+    define-properties "^1.1.2"
+    function-bind "^1.1.0"
+    object-keys "^1.0.10"
+
 object.omit@^2.0.0:
   version "2.0.1"
   resolved "https://registry.yarnpkg.com/object.omit/-/object.omit-2.0.1.tgz#1a9c744829f39dbb858c76ca3579ae2a54ebd1fa"
@@ -1245,12 +1879,27 @@ once@^1.3.0, once@^1.3.3:
   dependencies:
     wrappy "1"
 
+onetime@^1.0.0:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/onetime/-/onetime-1.1.0.tgz#a1f7838f8314c516f05ecefcbc4ccfe04b4ed789"
+
 opn@latest:
   version "5.1.0"
   resolved "https://registry.yarnpkg.com/opn/-/opn-5.1.0.tgz#72ce2306a17dbea58ff1041853352b4a8fc77519"
   dependencies:
     is-wsl "^1.1.0"
 
+optionator@^0.8.2:
+  version "0.8.2"
+  resolved "https://registry.yarnpkg.com/optionator/-/optionator-0.8.2.tgz#364c5e409d3f4d6301d6c0b4c05bba50180aeb64"
+  dependencies:
+    deep-is "~0.1.3"
+    fast-levenshtein "~2.0.4"
+    levn "~0.3.0"
+    prelude-ls "~1.1.2"
+    type-check "~0.3.2"
+    wordwrap "~1.0.0"
+
 os-homedir@^1.0.0:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/os-homedir/-/os-homedir-1.0.2.tgz#ffbc4988336e0e833de0c168c7ef152121aa7fb3"
@@ -1270,6 +1919,16 @@ p-finally@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/p-finally/-/p-finally-1.0.0.tgz#3fbcfb15b899a44123b34b6dcc18b724336a2cae"
 
+p-limit@^1.1.0:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/p-limit/-/p-limit-1.1.0.tgz#b07ff2d9a5d88bec806035895a2bab66a27988bc"
+
+p-locate@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/p-locate/-/p-locate-2.0.0.tgz#20a0103b222a70c8fd39cc2e580680f3dde5ec43"
+  dependencies:
+    p-limit "^1.1.0"
+
 package-json@^4.0.0:
   version "4.0.1"
   resolved "https://registry.yarnpkg.com/package-json/-/package-json-4.0.1.tgz#8869a0401253661c4c4ca3da6c2121ed555f5eed"
@@ -1288,10 +1947,26 @@ parse-glob@^3.0.4:
     is-extglob "^1.0.0"
     is-glob "^2.0.0"
 
+parse-json@^2.2.0:
+  version "2.2.0"
+  resolved "https://registry.yarnpkg.com/parse-json/-/parse-json-2.2.0.tgz#f480f40434ef80741f8469099f8dea18f55a4dc9"
+  dependencies:
+    error-ex "^1.2.0"
+
 parseurl@~1.3.1, parseurl@~1.3.2:
   version "1.3.2"
   resolved "https://registry.yarnpkg.com/parseurl/-/parseurl-1.3.2.tgz#fc289d4ed8993119460c156253262cdc8de65bf3"
 
+path-exists@^2.0.0:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/path-exists/-/path-exists-2.1.0.tgz#0feb6c64f0fc518d9a754dd5efb62c7022761f4b"
+  dependencies:
+    pinkie-promise "^2.0.0"
+
+path-exists@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/path-exists/-/path-exists-3.0.0.tgz#ce0ebeaa5f78cb18925ea7d810d7b59b010fd515"
+
 path-is-absolute@^1.0.0:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/path-is-absolute/-/path-is-absolute-1.0.1.tgz#174b9268735534ffbc7ace6bf53a5a9e1b5c5f5f"
@@ -1304,6 +1979,10 @@ path-key@^2.0.0:
   version "2.0.1"
   resolved "https://registry.yarnpkg.com/path-key/-/path-key-2.0.1.tgz#411cadb574c5a140d3a4b1910d40d80cc9f40b40"
 
+path-parse@^1.0.5:
+  version "1.0.5"
+  resolved "https://registry.yarnpkg.com/path-parse/-/path-parse-1.0.5.tgz#3c1adf871ea9cd6c9431b6ea2bd74a0ff055c4c1"
+
 pause-stream@0.0.11:
   version "0.0.11"
   resolved "https://registry.yarnpkg.com/pause-stream/-/pause-stream-0.0.11.tgz#fe5a34b0cbce12b5aa6a2b403ee2e73b602f1445"
@@ -1314,10 +1993,59 @@ performance-now@^0.2.0:
   version "0.2.0"
   resolved "https://registry.yarnpkg.com/performance-now/-/performance-now-0.2.0.tgz#33ef30c5c77d4ea21c5a53869d91b56d8f2555e5"
 
+pify@^2.0.0:
+  version "2.3.0"
+  resolved "https://registry.yarnpkg.com/pify/-/pify-2.3.0.tgz#ed141a6ac043a849ea588498e7dca8b15330e90c"
+
 pify@^3.0.0:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/pify/-/pify-3.0.0.tgz#e5a4acd2c101fdf3d9a4d07f0dbc4db49dd28176"
 
+pinkie-promise@^2.0.0:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/pinkie-promise/-/pinkie-promise-2.0.1.tgz#2135d6dfa7a358c069ac9b178776288228450ffa"
+  dependencies:
+    pinkie "^2.0.0"
+
+pinkie@^2.0.0:
+  version "2.0.4"
+  resolved "https://registry.yarnpkg.com/pinkie/-/pinkie-2.0.4.tgz#72556b80cfa0d48a974e80e77248e80ed4f7f870"
+
+pkg-conf@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/pkg-conf/-/pkg-conf-2.0.0.tgz#071c87650403bccfb9c627f58751bfe47c067279"
+  dependencies:
+    find-up "^2.0.0"
+    load-json-file "^2.0.0"
+
+pkg-config@^1.1.0:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/pkg-config/-/pkg-config-1.1.1.tgz#557ef22d73da3c8837107766c52eadabde298fe4"
+  dependencies:
+    debug-log "^1.0.0"
+    find-root "^1.0.0"
+    xtend "^4.0.1"
+
+pkg-dir@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/pkg-dir/-/pkg-dir-1.0.0.tgz#7a4b508a8d5bb2d629d447056ff4e9c9314cf3d4"
+  dependencies:
+    find-up "^1.0.0"
+
+pkg-up@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/pkg-up/-/pkg-up-1.0.0.tgz#3e08fb461525c4421624a33b9f7e6d0af5b05a26"
+  dependencies:
+    find-up "^1.0.0"
+
+pluralize@^1.2.1:
+  version "1.2.1"
+  resolved "https://registry.yarnpkg.com/pluralize/-/pluralize-1.2.1.tgz#d1a21483fd22bb41e58a12fa3421823140897c45"
+
+prelude-ls@~1.1.2:
+  version "1.1.2"
+  resolved "https://registry.yarnpkg.com/prelude-ls/-/prelude-ls-1.1.2.tgz#21932a549f5e52ffd9a827f570e04be62a97da54"
+
 prepend-http@^1.0.1:
   version "1.0.4"
   resolved "https://registry.yarnpkg.com/prepend-http/-/prepend-http-1.0.4.tgz#d4f4562b0ce3696e41ac52d0e002e57a635dc6dc"
@@ -1330,6 +2058,10 @@ process-nextick-args@~1.0.6:
   version "1.0.7"
   resolved "https://registry.yarnpkg.com/process-nextick-args/-/process-nextick-args-1.0.7.tgz#150e20b756590ad3f91093f25a4f2ad8bff30ba3"
 
+progress@^1.1.8:
+  version "1.1.8"
+  resolved "https://registry.yarnpkg.com/progress/-/progress-1.1.8.tgz#e260c78f6161cdd9b0e56cc3e0a85de17c7a57be"
+
 proxy-middleware@latest:
   version "0.15.0"
   resolved "https://registry.yarnpkg.com/proxy-middleware/-/proxy-middleware-0.15.0.tgz#a3fdf1befb730f951965872ac2f6074c61477a56"
@@ -1372,7 +2104,7 @@ rc@^1.0.1, rc@^1.1.6, rc@^1.1.7:
     minimist "^1.2.0"
     strip-json-comments "~2.0.1"
 
-readable-stream@^2.0.2, readable-stream@^2.0.6, readable-stream@^2.1.4:
+readable-stream@^2.0.2, readable-stream@^2.0.6, readable-stream@^2.1.4, readable-stream@^2.2.2:
   version "2.3.3"
   resolved "https://registry.yarnpkg.com/readable-stream/-/readable-stream-2.3.3.tgz#368f2512d79f9d46fdfc71349ae7878bbc1eb95c"
   dependencies:
@@ -1393,6 +2125,20 @@ readdirp@^2.0.0:
     readable-stream "^2.0.2"
     set-immediate-shim "^1.0.1"
 
+readline2@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/readline2/-/readline2-1.0.1.tgz#41059608ffc154757b715d9989d199ffbf372e35"
+  dependencies:
+    code-point-at "^1.0.0"
+    is-fullwidth-code-point "^1.0.0"
+    mute-stream "0.0.5"
+
+rechoir@^0.6.2:
+  version "0.6.2"
+  resolved "https://registry.yarnpkg.com/rechoir/-/rechoir-0.6.2.tgz#85204b54dba82d5742e28c96756ef43af50e3384"
+  dependencies:
+    resolve "^1.1.6"
+
 regex-cache@^0.4.2:
   version "0.4.4"
   resolved "https://registry.yarnpkg.com/regex-cache/-/regex-cache-0.4.4.tgz#75bdc58a2a1496cec48a12835bc54c8d562336dd"
@@ -1451,12 +2197,50 @@ request@2.81.0:
     tunnel-agent "^0.6.0"
     uuid "^3.0.0"
 
-rimraf@2, rimraf@^2.5.1, rimraf@^2.6.1:
+require-uncached@^1.0.2:
+  version "1.0.3"
+  resolved "https://registry.yarnpkg.com/require-uncached/-/require-uncached-1.0.3.tgz#4e0d56d6c9662fd31e43011c4b95aa49955421d3"
+  dependencies:
+    caller-path "^0.1.0"
+    resolve-from "^1.0.0"
+
+resolve-from@^1.0.0:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/resolve-from/-/resolve-from-1.0.1.tgz#26cbfe935d1aeeeabb29bc3fe5aeb01e93d44226"
+
+resolve@^1.1.6, resolve@^1.1.7:
+  version "1.5.0"
+  resolved "https://registry.yarnpkg.com/resolve/-/resolve-1.5.0.tgz#1f09acce796c9a762579f31b2c1cc4c3cddf9f36"
+  dependencies:
+    path-parse "^1.0.5"
+
+restore-cursor@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/restore-cursor/-/restore-cursor-1.0.1.tgz#34661f46886327fed2991479152252df92daa541"
+  dependencies:
+    exit-hook "^1.0.0"
+    onetime "^1.0.0"
+
+rimraf@2, rimraf@^2.2.8, rimraf@^2.5.1, rimraf@^2.6.1:
   version "2.6.2"
   resolved "https://registry.yarnpkg.com/rimraf/-/rimraf-2.6.2.tgz#2ed8150d24a16ea8651e6d6ef0f47c4158ce7a36"
   dependencies:
     glob "^7.0.5"
 
+run-async@^0.1.0:
+  version "0.1.0"
+  resolved "https://registry.yarnpkg.com/run-async/-/run-async-0.1.0.tgz#c8ad4a5e110661e402a7d21b530e009f25f8e389"
+  dependencies:
+    once "^1.3.0"
+
+run-parallel@^1.1.2:
+  version "1.1.6"
+  resolved "https://registry.yarnpkg.com/run-parallel/-/run-parallel-1.1.6.tgz#29003c9a2163e01e2d2dfc90575f2c6c1d61a039"
+
+rx-lite@^3.1.2:
+  version "3.1.2"
+  resolved "https://registry.yarnpkg.com/rx-lite/-/rx-lite-3.1.2.tgz#19ce502ca572665f3b647b10939f97fd1615f102"
+
 rx@2.3.24:
   version "2.3.24"
   resolved "https://registry.yarnpkg.com/rx/-/rx-2.3.24.tgz#14f950a4217d7e35daa71bbcbe58eff68ea4b2b7"
@@ -1465,12 +2249,31 @@ safe-buffer@5.1.1, safe-buffer@^5.0.1, safe-buffer@~5.1.0, safe-buffer@~5.1.1:
   version "5.1.1"
   resolved "https://registry.yarnpkg.com/safe-buffer/-/safe-buffer-5.1.1.tgz#893312af69b2123def71f57889001671eeb2c853"
 
+semistandard@^11.0.0:
+  version "11.0.0"
+  resolved "https://registry.yarnpkg.com/semistandard/-/semistandard-11.0.0.tgz#d2d9fc8ac393de21312195e006e50c8861391c47"
+  dependencies:
+    eslint "~3.19.0"
+    eslint-config-semistandard "^11.0.0"
+    eslint-config-standard "^10.2.1"
+    eslint-config-standard-jsx "4.0.1"
+    eslint-plugin-import "~2.2.0"
+    eslint-plugin-node "~4.2.2"
+    eslint-plugin-promise "~3.5.0"
+    eslint-plugin-react "~6.10.0"
+    eslint-plugin-standard "~3.0.1"
+    standard-engine "~7.0.0"
+
 semver-diff@^2.0.0:
   version "2.1.0"
   resolved "https://registry.yarnpkg.com/semver-diff/-/semver-diff-2.1.0.tgz#4bbb8437c8d37e4b0cf1a68fd726ec6d645d6d36"
   dependencies:
     semver "^5.0.3"
 
+semver@5.3.0:
+  version "5.3.0"
+  resolved "https://registry.yarnpkg.com/semver/-/semver-5.3.0.tgz#9b2ce5d3de02d17c6012ad326aa6b4d0cf54f94f"
+
 semver@^5.0.3, semver@^5.1.0, semver@^5.3.0:
   version "5.4.1"
   resolved "https://registry.yarnpkg.com/semver/-/semver-5.4.1.tgz#e059c09d8571f0540823733433505d3a2f00b18e"
@@ -1527,10 +2330,22 @@ shebang-regex@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/shebang-regex/-/shebang-regex-1.0.0.tgz#da42f49740c0b42db2ca9728571cb190c98efea3"
 
+shelljs@^0.7.5:
+  version "0.7.8"
+  resolved "https://registry.yarnpkg.com/shelljs/-/shelljs-0.7.8.tgz#decbcf874b0d1e5fb72e14b164a9683048e9acb3"
+  dependencies:
+    glob "^7.0.0"
+    interpret "^1.0.0"
+    rechoir "^0.6.2"
+
 signal-exit@^3.0.0, signal-exit@^3.0.2:
   version "3.0.2"
   resolved "https://registry.yarnpkg.com/signal-exit/-/signal-exit-3.0.2.tgz#b5fdc08f1287ea1178628e415e25132b73646c6d"
 
+slice-ansi@0.0.4:
+  version "0.0.4"
+  resolved "https://registry.yarnpkg.com/slice-ansi/-/slice-ansi-0.0.4.tgz#edbf8903f66f7ce2f8eafd6ceed65e264c831b35"
+
 sntp@1.x.x:
   version "1.0.9"
   resolved "https://registry.yarnpkg.com/sntp/-/sntp-1.0.9.tgz#6541184cc90aeea6c6e7b35e2659082443c66198"
@@ -1565,6 +2380,15 @@ sshpk@^1.7.0:
     jsbn "~0.1.0"
     tweetnacl "~0.14.0"
 
+standard-engine@~7.0.0:
+  version "7.0.0"
+  resolved "https://registry.yarnpkg.com/standard-engine/-/standard-engine-7.0.0.tgz#ebb77b9c8fc2c8165ffa353bd91ba0dff41af690"
+  dependencies:
+    deglob "^2.1.0"
+    get-stdin "^5.0.1"
+    minimist "^1.1.0"
+    pkg-conf "^2.0.0"
+
 "statuses@>= 1.3.1 < 2":
   version "1.4.0"
   resolved "https://registry.yarnpkg.com/statuses/-/statuses-1.4.0.tgz#bb73d446da2796106efcc1b601a253d6c46bd087"
@@ -1622,6 +2446,10 @@ strip-ansi@^4.0.0:
   dependencies:
     ansi-regex "^3.0.0"
 
+strip-bom@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/strip-bom/-/strip-bom-3.0.0.tgz#2334c18e9c759f7bdd56fdef7e9ae3d588e68ed3"
+
 strip-eof@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/strip-eof/-/strip-eof-1.0.0.tgz#bb43ff5598a6eb05d89b59fcd129c983313606bf"
@@ -1634,6 +2462,10 @@ supports-color@^0.2.0:
   version "0.2.0"
   resolved "https://registry.yarnpkg.com/supports-color/-/supports-color-0.2.0.tgz#d92de2694eb3f67323973d7ae3d8b55b4c22190a"
 
+supports-color@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/supports-color/-/supports-color-2.0.0.tgz#535d045ce6b6363fa40117084629995e9df324c7"
+
 supports-color@^3.2.3:
   version "3.2.3"
   resolved "https://registry.yarnpkg.com/supports-color/-/supports-color-3.2.3.tgz#65ac0504b3954171d8a64946b2ae3cbb8a5f54f6"
@@ -1646,6 +2478,17 @@ supports-color@^4.0.0:
   dependencies:
     has-flag "^2.0.0"
 
+table@^3.7.8:
+  version "3.8.3"
+  resolved "https://registry.yarnpkg.com/table/-/table-3.8.3.tgz#2bbc542f0fda9861a755d3947fefd8b3f513855f"
+  dependencies:
+    ajv "^4.7.0"
+    ajv-keywords "^1.0.0"
+    chalk "^1.1.1"
+    lodash "^4.0.0"
+    slice-ansi "0.0.4"
+    string-width "^2.0.0"
+
 tar-pack@^3.4.0:
   version "3.4.1"
   resolved "https://registry.yarnpkg.com/tar-pack/-/tar-pack-3.4.1.tgz#e1dbc03a9b9d3ba07e896ad027317eb679a10a1f"
@@ -1673,7 +2516,11 @@ term-size@^1.2.0:
   dependencies:
     execa "^0.7.0"
 
-through@2, through@~2.3, through@~2.3.1:
+text-table@~0.2.0:
+  version "0.2.0"
+  resolved "https://registry.yarnpkg.com/text-table/-/text-table-0.2.0.tgz#7f5ee823ae805207c00af2df4a84ec3fcfa570b4"
+
+through@2, through@^2.3.6, through@~2.3, through@~2.3.1:
   version "2.3.8"
   resolved "https://registry.yarnpkg.com/through/-/through-2.3.8.tgz#0dd4c9ffaabc357960b1b724115d7e0e86a2e1f5"
 
@@ -1707,6 +2554,16 @@ tweetnacl@^0.14.3, tweetnacl@~0.14.0:
   version "0.14.5"
   resolved "https://registry.yarnpkg.com/tweetnacl/-/tweetnacl-0.14.5.tgz#5ae68177f192d4456269d108afa93ff8743f4f64"
 
+type-check@~0.3.2:
+  version "0.3.2"
+  resolved "https://registry.yarnpkg.com/type-check/-/type-check-0.3.2.tgz#5884cab512cf1d355e3fb784f30804b2b520db72"
+  dependencies:
+    prelude-ls "~1.1.2"
+
+typedarray@^0.0.6:
+  version "0.0.6"
+  resolved "https://registry.yarnpkg.com/typedarray/-/typedarray-0.0.6.tgz#867ac74e3864187b1d3d47d996a78ec5c8830777"
+
 uc.micro@^1.0.1, uc.micro@^1.0.3:
   version "1.0.3"
   resolved "https://registry.yarnpkg.com/uc.micro/-/uc.micro-1.0.3.tgz#7ed50d5e0f9a9fb0a573379259f2a77458d50192"
@@ -1719,6 +2576,10 @@ undefsafe@0.0.3:
   version "0.0.3"
   resolved "https://registry.yarnpkg.com/undefsafe/-/undefsafe-0.0.3.tgz#ecca3a03e56b9af17385baac812ac83b994a962f"
 
+uniq@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/uniq/-/uniq-1.0.1.tgz#b31c5ae8254844a3a8281541ce2b04b865a734ff"
+
 unique-string@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/unique-string/-/unique-string-1.0.0.tgz#9e1057cca851abb93398f8b33ae187b99caec11a"
@@ -1761,6 +2622,12 @@ url-parse-lax@^1.0.0:
   dependencies:
     prepend-http "^1.0.1"
 
+user-home@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/user-home/-/user-home-2.0.0.tgz#9c70bfd8169bc1dcbf48604e0f04b8b49cde9e9f"
+  dependencies:
+    os-homedir "^1.0.0"
+
 util-deprecate@~1.0.1:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/util-deprecate/-/util-deprecate-1.0.2.tgz#450d4dc9fa70de732762fbd2d4a28981419a0ccf"
@@ -1814,6 +2681,10 @@ widest-line@^1.0.0:
   dependencies:
     string-width "^1.0.1"
 
+wordwrap@~1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/wordwrap/-/wordwrap-1.0.0.tgz#27584810891456a4171c8d0226441ade90cbcaeb"
+
 wrappy@1:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/wrappy/-/wrappy-1.0.2.tgz#b5243d8f3ec1aa35f1364605bc0d1036e30ab69f"
@@ -1826,10 +2697,20 @@ write-file-atomic@^2.0.0:
     imurmurhash "^0.1.4"
     signal-exit "^3.0.2"
 
+write@^0.2.1:
+  version "0.2.1"
+  resolved "https://registry.yarnpkg.com/write/-/write-0.2.1.tgz#5fc03828e264cea3fe91455476f7a3c566cb0757"
+  dependencies:
+    mkdirp "^0.5.1"
+
 xdg-basedir@^3.0.0:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/xdg-basedir/-/xdg-basedir-3.0.0.tgz#496b2cc109eca8dbacfe2dc72b603c17c5870ad4"
 
+xtend@^4.0.0, xtend@^4.0.1:
+  version "4.0.1"
+  resolved "https://registry.yarnpkg.com/xtend/-/xtend-4.0.1.tgz#a5c6d532be656e23db820efb943a1f04998d63af"
+
 yallist@^2.1.2:
   version "2.1.2"
   resolved "https://registry.yarnpkg.com/yallist/-/yallist-2.1.2.tgz#1c11f9218f076089a47dd512f93c6699a6a81d52"

From a1341458ab31a8aa457d833e48f9ccfd8ca8c519 Mon Sep 17 00:00:00 2001
From: Marcel Michau <marcelmichau@gmail.com>
Date: Thu, 14 Dec 2017 18:01:43 +0200
Subject: [PATCH 14/23] Renamed 'redirect-to-url.md' to 'redirect-to-URL.md' to
 keep case consistent with other headings

---
 README.md                   | 2 +-
 snippets/redirect-to-url.md | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/README.md b/README.md
index ba2c3d8bd..bb4b99a85 100644
--- a/README.md
+++ b/README.md
@@ -69,7 +69,7 @@
 * [Promisify](#promisify)
 * [Random integer in range](#random-integer-in-range)
 * [Random number in range](#random-number-in-range)
-* [Redirect to url](#redirect-to-url)
+* [Redirect to URL](#redirect-to-url)
 * [Reverse a string](#reverse-a-string)
 * [RGB to hexadecimal](#rgb-to-hexadecimal)
 * [Run promises in series](#run-promises-in-series)
diff --git a/snippets/redirect-to-url.md b/snippets/redirect-to-url.md
index dab1f775b..70356686f 100644
--- a/snippets/redirect-to-url.md
+++ b/snippets/redirect-to-url.md
@@ -5,6 +5,6 @@ Pass a second argument to simulate a link click (`true` - default) or an HTTP re
 
 ```js
 const redirect = (url, asLink = true) =>
-  asLink ? window.location.href = url : window.location.replace(url);
+	asLink ? (window.location.href = url) : window.location.replace(url);
 // redirect('https://google.com')
 ```

From e4e8ea98dc509aee3e0938eb952e7a476d229382 Mon Sep 17 00:00:00 2001
From: Marcel Michau <marcelmichau@gmail.com>
Date: Thu, 14 Dec 2017 18:07:29 +0200
Subject: [PATCH 15/23] Undo Prettier auto-formatting

---
 snippets/{redirect-to-url.md => redirect-to-URL.md} | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
 rename snippets/{redirect-to-url.md => redirect-to-URL.md} (80%)

diff --git a/snippets/redirect-to-url.md b/snippets/redirect-to-URL.md
similarity index 80%
rename from snippets/redirect-to-url.md
rename to snippets/redirect-to-URL.md
index 70356686f..dab1f775b 100644
--- a/snippets/redirect-to-url.md
+++ b/snippets/redirect-to-URL.md
@@ -5,6 +5,6 @@ Pass a second argument to simulate a link click (`true` - default) or an HTTP re
 
 ```js
 const redirect = (url, asLink = true) =>
-	asLink ? (window.location.href = url) : window.location.replace(url);
+  asLink ? window.location.href = url : window.location.replace(url);
 // redirect('https://google.com')
 ```

From 06018e143aa086bba8081025aa4fdbcfa06955ee Mon Sep 17 00:00:00 2001
From: Angelos Chalaris <chalarangelo@gmail.com>
Date: Thu, 14 Dec 2017 18:24:49 +0200
Subject: [PATCH 16/23] Categorization

---
 README.md          | 1425 +++++++++++++++++++++++---------------------
 scripts/builder.js |   31 +-
 scripts/tagger.js  |    9 +-
 3 files changed, 785 insertions(+), 680 deletions(-)

diff --git a/README.md b/README.md
index 65a72b1a0..46fcf2e14 100644
--- a/README.md
+++ b/README.md
@@ -9,105 +9,103 @@
 
 ## Table of Contents
 
-* [Anagrams of string (with duplicates)](#anagrams-of-string-with-duplicates)
+### Array
 * [Array concatenation](#array-concatenation)
 * [Array difference](#array-difference)
 * [Array intersection](#array-intersection)
 * [Array union](#array-union)
 * [Average of array of numbers](#average-of-array-of-numbers)
-* [Bottom visible](#bottom-visible)
-* [Capitalize first letter of every word](#capitalize-first-letter-of-every-word)
-* [Capitalize first letter](#capitalize-first-letter)
-* [Chain asynchronous functions](#chain-asynchronous-functions)
-* [Check for palindrome](#check-for-palindrome)
 * [Chunk array](#chunk-array)
-* [Collatz algorithm](#collatz-algorithm)
 * [Compact](#compact)
 * [Count occurrences of a value in array](#count-occurrences-of-a-value-in-array)
-* [Current URL](#current-url)
-* [Curry](#curry)
 * [Deep flatten array](#deep-flatten-array)
-* [Distance between two points](#distance-between-two-points)
-* [Divisible by number](#divisible-by-number)
 * [Drop elements in array](#drop-elements-in-array)
-* [Element is visible in viewport](#element-is-visible-in-viewport)
-* [Escape regular expression](#escape-regular-expression)
-* [Even or odd number](#even-or-odd-number)
-* [Factorial](#factorial)
-* [Fibonacci array generator](#fibonacci-array-generator)
 * [Fill array](#fill-array)
 * [Filter out non unique values in an array](#filter-out-non-unique-values-in-an-array)
 * [Flatten array up to depth](#flatten-array-up-to-depth)
 * [Flatten array](#flatten-array)
 * [Get max value from array](#get-max-value-from-array)
 * [Get min value from array](#get-min-value-from-array)
-* [Get native type of value](#get-native-type-of-value)
-* [Get scroll position](#get-scroll-position)
-* [Greatest common divisor (GCD)](#greatest-common-divisor-gcd)
 * [Group by](#group-by)
-* [Hamming distance](#hamming-distance)
 * [Head of list](#head-of-list)
 * [Initial of list](#initial-of-list)
 * [Initialize array with range](#initialize-array-with-range)
 * [Initialize array with values](#initialize-array-with-values)
+* [Last of list](#last-of-list)
+* [Median of array of numbers](#median-of-array-of-numbers)
+* [Pick](#pick)
+* [Shuffle array](#shuffle-array)
+* [Similarity between arrays](#similarity-between-arrays)
+* [Sum of array of numbers](#sum-of-array-of-numbers)
+* [Tail of list](#tail-of-list)
+* [Take](#take)
+* [Unique values of array](#unique-values-of-array)
+
+### Browser
+* [Bottom visible](#bottom-visible)
+* [Current URL](#current-url)
+* [Element is visible in viewport](#element-is-visible-in-viewport)
+* [Get scroll position](#get-scroll-position)
+* [Redirect to URL](#redirect-to-url)
+* [Scroll to top](#scroll-to-top)
+
+### Function
+* [Chain asynchronous functions](#chain-asynchronous-functions)
+* [Curry](#curry)
+* [Pipe](#pipe)
+* [Promisify](#promisify)
+* [Run promises in series](#run-promises-in-series)
+* [Sleep](#sleep)
+
+### Math
+* [Collatz algorithm](#collatz-algorithm)
+* [Distance between two points](#distance-between-two-points)
+* [Divisible by number](#divisible-by-number)
+* [Even or odd number](#even-or-odd-number)
+* [Factorial](#factorial)
+* [Fibonacci array generator](#fibonacci-array-generator)
+* [Greatest common divisor (GCD)](#greatest-common-divisor-gcd)
+* [Hamming distance](#hamming-distance)
+* [Percentile](#percentile)
+* [Powerset](#powerset)
+* [Standard deviation](#standard-deviation)
+
+### Object
+* [Object from key value pairs](#object-from-key-value-pairs)
+* [Object to key value pairs](#object-to-key-value-pairs)
+
+### String
+* [Anagrams of string (with duplicates)](#anagrams-of-string-with-duplicates)
+* [Capitalize first letter of every word](#capitalize-first-letter-of-every-word)
+* [Capitalize first letter](#capitalize-first-letter)
+* [Check for palindrome](#check-for-palindrome)
+* [Reverse a string](#reverse-a-string)
+* [Sort characters in string (alphabetical)](#sort-characters-in-string-alphabetical)
+* [Truncate a string](#truncate-a-string)
+
+### Utility
+* [Escape regular expression](#escape-regular-expression)
+* [Get native type of value](#get-native-type-of-value)
 * [Is array](#is-array)
 * [Is boolean](#is-boolean)
 * [Is function](#is-function)
 * [Is number](#is-number)
 * [Is string](#is-string)
 * [Is symbol](#is-symbol)
-* [Last of list](#last-of-list)
 * [Measure time taken by function](#measure-time-taken-by-function)
-* [Median of array of numbers](#median-of-array-of-numbers)
-* [Object from key value pairs](#object-from-key-value-pairs)
-* [Object to key value pairs](#object-to-key-value-pairs)
 * [Ordinal suffix of number](#ordinal-suffix-of-number)
-* [Percentile](#percentile)
-* [Pick](#pick)
-* [Pipe](#pipe)
-* [Powerset](#powerset)
-* [Promisify](#promisify)
 * [Random integer in range](#random-integer-in-range)
 * [Random number in range](#random-number-in-range)
-* [Redirect to URL](#redirect-to-url)
-* [Reverse a string](#reverse-a-string)
 * [RGB to hexadecimal](#rgb-to-hexadecimal)
-* [Run promises in series](#run-promises-in-series)
-* [Scroll to top](#scroll-to-top)
-* [Shuffle array](#shuffle-array)
-* [Similarity between arrays](#similarity-between-arrays)
-* [Sleep](#sleep)
-* [Sort characters in string (alphabetical)](#sort-characters-in-string-alphabetical)
-* [Standard deviation](#standard-deviation)
-* [Sum of array of numbers](#sum-of-array-of-numbers)
 * [Swap values of two variables](#swap-values-of-two-variables)
-* [Tail of list](#tail-of-list)
-* [Take](#take)
-* [Truncate a string](#truncate-a-string)
-* [Unique values of array](#unique-values-of-array)
 * [URL parameters](#url-parameters)
 * [UUID generator](#uuid-generator)
 * [Validate email](#validate-email)
 * [Validate number](#validate-number)
 * [Value or default](#value-or-default)
 
-### Anagrams of string (with duplicates)
+## Array
 
-Use recursion.
-For each letter in the given string, create all the partial anagrams for the rest of its letters.
-Use `Array.map()` to combine the letter with each partial anagram, then `Array.reduce()` to combine all anagrams in one array.
-Base cases are for string `length` equal to `2` or `1`.
-
-```js
-const anagrams = str => {
-  if (str.length <= 2) return str.length === 2 ? [str, str[1] + str[0]] : [str];
-  return str.split('').reduce((acc, letter, i) =>
-    acc.concat(anagrams(str.slice(0, i) + str.slice(i + 1)).map(val => letter + val)), []);
-};
-// anagrams('abc') -> ['abc','acb','bac','bca','cab','cba']
-```
-
-[⬆ back to top](#table-of-contents)
 ### Array concatenation
 
 Use `Array.concat()` to concatenate and array with any additional arrays and/or values, specified in `args`.
@@ -118,6 +116,7 @@ const arrayConcat = (arr, ...args) => arr.concat(...args);
 ```
 
 [⬆ back to top](#table-of-contents)
+
 ### Array difference
 
 Create a `Set` from `b`, then use `Array.filter()` on `a` to only keep values not contained in `b`.
@@ -128,6 +127,7 @@ const difference = (a, b) => { const s = new Set(b); return a.filter(x => !s.has
 ```
 
 [⬆ back to top](#table-of-contents)
+
 ### Array intersection
 
 Create a `Set` from `b`, then use `Array.filter()` on `a` to only keep values contained in `b`.
@@ -138,6 +138,7 @@ const intersection = (a, b) => { const s = new Set(b); return a.filter(x => s.ha
 ```
 
 [⬆ back to top](#table-of-contents)
+
 ### Array union
 
 Create a `Set` with all values of `a` and `b` and convert to an array.
@@ -148,6 +149,7 @@ const union = (a, b) => Array.from(new Set([...a, ...b]))
 ```
 
 [⬆ back to top](#table-of-contents)
+
 ### Average of array of numbers
 
 Use `Array.reduce()` to add each value to an accumulator, initialized with a value of `0`, divide by the `length` of the array.
@@ -158,69 +160,7 @@ const average = arr => arr.reduce((acc, val) => acc + val, 0) / arr.length;
 ```
 
 [⬆ back to top](#table-of-contents)
-### Bottom visible
 
-Use `scrollY`, `scrollHeight` and `clientHeight` to determine if the bottom of the page is visible.
-
-```js
-const bottomVisible = _ =>
-  document.documentElement.clientHeight + window.scrollY >= document.documentElement.scrollHeight || document.documentElement.clientHeight;
-// bottomVisible() -> true
-```
-
-[⬆ back to top](#table-of-contents)
-### Capitalize first letter of every word
-
-Use `replace()` to match the first character of each word and `toUpperCase()` to capitalize it.
-
-```js
-const capitalizeEveryWord = str => str.replace(/\b[a-z]/g, char => char.toUpperCase());
-// capitalizeEveryWord('hello world!') -> 'Hello World!'
-```
-
-[⬆ back to top](#table-of-contents)
-### Capitalize first letter
-
-Use `slice(0,1)` and `toUpperCase()` to capitalize first letter, `slice(1)` to get the rest of the string.
-Omit the `lowerRest` parameter to keep the rest of the string intact, or set it to `true` to convert to lower case.
-
-```js
-const capitalize = (str, lowerRest = false) =>
-  str.slice(0, 1).toUpperCase() + (lowerRest ? str.slice(1).toLowerCase() : str.slice(1));
-// capitalize('myName', true) -> 'Myname'
-```
-
-[⬆ back to top](#table-of-contents)
-### Chain asynchronous functions
-
-Loop through an array of functions containing asynchronous events, calling `next` when each asynchronous event has completed.
-
-```js
-const chainAsync = fns => { let curr = 0; const next = () => fns[curr++](next); next(); };
-/*
-chainAsync([
-  next => { console.log('0 seconds'); setTimeout(next, 1000); },
-  next => { console.log('1 second');  setTimeout(next, 1000); },
-  next => { console.log('2 seconds'); }
-])
-*/
-```
-
-[⬆ back to top](#table-of-contents)
-### Check for palindrome
-
-Convert string `toLowerCase()` and use `replace()` to remove non-alphanumeric characters from it.
-Then, `split('')` into individual characters, `reverse()`, `join('')` and compare to the original, unreversed string, after converting it `tolowerCase()`.
-
-```js
-const palindrome = str => {
-  const s = str.toLowerCase().replace(/[\W_]/g,'');
-  return s === s.split('').reverse().join('');
-}
-// palindrome('taco cat') -> true
- ```
-
-[⬆ back to top](#table-of-contents)
 ### Chunk array
 
 Use `Array.from()` to create a new array, that fits the number of chunks that will be produced.
@@ -234,17 +174,7 @@ const chunk = (arr, size) =>
 ```
 
 [⬆ back to top](#table-of-contents)
-### Collatz algorithm
 
-If `n` is even, return `n/2`. Otherwise  return `3n+1`.
-
-```js
-const collatz = n => (n % 2 == 0) ? (n/2) : (3*n+1); 
-// collatz(8) --> 4
-// collatz(5) --> 16
-```
-
-[⬆ back to top](#table-of-contents)
 ### Compact
 
 Use `Array.filter()` to filter out falsey values (`false`, `null`, `0`, `""`, `undefined`, and `NaN`).
@@ -255,6 +185,7 @@ const compact = (arr) => arr.filter(v => v);
 ```
 
 [⬆ back to top](#table-of-contents)
+
 ### Count occurrences of a value in array
 
 Use `Array.reduce()` to increment a counter each time you encounter the specific value inside the array.
@@ -265,36 +196,7 @@ const countOccurrences = (arr, value) => arr.reduce((a, v) => v === value ? a +
 ```
 
 [⬆ back to top](#table-of-contents)
-### Current URL
 
-Use `window.location.href` to get current URL.
-
-```js
-const currentUrl = _ => window.location.href;
-// currentUrl() -> 'https://google.com'
-```
-
-[⬆ back to top](#table-of-contents)
-### Curry
-
-Use recursion.
-If the number of provided arguments (`args`) is sufficient, call the passed function `f`.
-Otherwise return a curried function `f` that expects the rest of the arguments.
-If you want to curry a function that accepts a variable number of arguments (a variadic function, e.g. `Math.min()`), you can optionally pass the number of arguments to the second parameter `arity`.
-
-```js
-const curry = (f, arity = f.length, next) =>
-  (next = prevArgs =>
-    nextArg => {
-      const args = [ ...prevArgs, nextArg ];
-      return args.length >= arity ? f(...args) : next(args);
-    }
-  )([]);
-// curry(Math.pow)(2)(10) -> 1024
-// curry(Math.min, 3)(10)(50)(2) -> 2
-```
-
-[⬆ back to top](#table-of-contents)
 ### Deep flatten array
 
 Use recursion.
@@ -307,26 +209,7 @@ const deepFlatten = arr =>
 ```
 
 [⬆ back to top](#table-of-contents)
-### Distance between two points
 
-Use `Math.hypot()` to calculate the Euclidean distance between two points.
-
-```js
-const distance = (x0, y0, x1, y1) => Math.hypot(x1 - x0, y1 - y0);
-// distance(1,1, 2,3) -> 2.23606797749979
-```
-
-[⬆ back to top](#table-of-contents)
-### Divisible by number
-
-Use the modulo operator (`%`) to check if the remainder is equal to `0`.
-
-```js
-const isDivisible = (dividend, divisor) => dividend % divisor === 0;
-// isDivisible(6,3) -> true
-```
-
-[⬆ back to top](#table-of-contents)
 ### Drop elements in array
 
 Loop through the array, using `Array.shift()` to drop the first element of the array until the returned value from the function is `true`. 
@@ -341,6 +224,274 @@ const dropElements = (arr,func) => {
 ```
 
 [⬆ back to top](#table-of-contents)
+
+### Fill array
+
+Use `Array.map()` to map values between `start` (inclusive) and `end` (exclusive) to `value`.
+Omit `start` to start at the first element and/or `end` to finish at the last.
+
+```js
+const fillArray = (arr, value, start = 0, end = arr.length) => 
+  arr.map((v,i) => i>=start && i<end ? value : v);
+// fillArray([1,2,3,4],'8',1,3) -> [1,'8','8',4]
+```
+
+[⬆ back to top](#table-of-contents)
+
+### Filter out non-unique values in an array
+
+Use `Array.filter()` for an array containing only the unique values.
+
+```js
+const filterNonUnique = arr => arr.filter(i => arr.indexOf(i) === arr.lastIndexOf(i));
+// filterNonUnique([1,2,2,3,4,4,5]) -> [1,3,5]
+```
+
+[⬆ back to top](#table-of-contents)
+
+### Flatten array up to depth
+
+Use recursion, decrementing `depth` by 1 for each level of depth.
+Use `Array.reduce()` and `Array.concat()` to merge elements or arrays.
+Base case, for `depth` equal to `1` stops recursion.
+Omit the second element, `depth` to flatten only to a depth of `1` (single flatten).
+
+```js
+const flattenDepth = (arr, depth = 1) =>
+  depth != 1 ? arr.reduce((a, v) => a.concat(Array.isArray(v) ? flattenDepth (v, depth-1) : v), []) 
+  : arr.reduce((a,v) => a.concat(v),[]);
+// flattenDepth([1,[2],[[[3],4],5]], 2) -> [1,2,[3],4,5]
+```
+
+[⬆ back to top](#table-of-contents)
+
+### Flatten array
+
+Use `Array.reduce()` to get all elements inside the array and `concat()` to flatten them.
+
+```js
+const flatten = arr => arr.reduce((a, v) => a.concat(v), []);
+// flatten([1,[2],3,4]) -> [1,2,3,4]
+```
+
+[⬆ back to top](#table-of-contents)
+
+### Get max value from array
+
+Use `Math.max()` combined with the spread operator (`...`) to get the maximum value in the array.
+
+```js
+const arrayMax = arr => Math.max(...arr);
+// arrayMax([10, 1, 5]) -> 10
+```
+
+[⬆ back to top](#table-of-contents)
+
+### Get min value from array
+
+Use `Math.min()` combined with the spread operator (`...`) to get the minimum value in the array.
+
+```js
+const arrayMin = arr => Math.min(...arr);
+// arrayMin([10, 1, 5]) -> 1
+```
+
+[⬆ back to top](#table-of-contents)
+
+### Group by
+
+Use `Array.map()` to map the values of an array to a function or property name.
+Use `Array.reduce()` to create an object, where the keys are produced from the mapped results.
+
+```js
+const groupBy = (arr, func) =>
+  arr.map(typeof func === 'function' ? func : val => val[func])
+    .reduce((acc, val, i) => { acc[val] = (acc[val] || []).concat(arr[i]); return acc; }, {});
+// groupBy([6.1, 4.2, 6.3], Math.floor) -> {4: [4.2], 6: [6.1, 6.3]}
+// groupBy(['one', 'two', 'three'], 'length') -> {3: ['one', 'two'], 5: ['three']}
+```
+
+[⬆ back to top](#table-of-contents)
+
+### Head of list
+
+Use `arr[0]` to return the first element of the passed array.
+
+```js
+const head = arr => arr[0];
+// head([1,2,3]) -> 1
+```
+
+[⬆ back to top](#table-of-contents)
+
+### Initial of list
+
+Use `arr.slice(0,-1)`to return all but the last element of the array.
+
+```js
+const initial = arr => arr.slice(0, -1);
+// initial([1,2,3]) -> [1,2]
+```
+
+[⬆ back to top](#table-of-contents)
+
+### Initialize array with range
+
+Use `Array(end-start)` to create an array of the desired length, `Array.map()` to fill with the desired values in a range.
+You can omit `start` to use a default value of `0`.
+
+```js
+const initializeArrayRange = (end, start = 0) =>
+  Array.apply(null, Array(end - start)).map((v, i) => i + start);
+// initializeArrayRange(5) -> [0,1,2,3,4]
+```
+
+[⬆ back to top](#table-of-contents)
+
+### Initialize array with values
+
+Use `Array(n)` to create an array of the desired length, `fill(v)` to fill it with the desired values.
+You can omit `value` to use a default value of `0`.
+
+```js
+const initializeArray = (n, value = 0) => Array(n).fill(value);
+// initializeArray(5, 2) -> [2,2,2,2,2]
+```
+
+[⬆ back to top](#table-of-contents)
+
+### Last of list
+
+Use `arr.slice(-1)[0]` to get the last element of the given array.
+
+```js
+const last = arr => arr.slice(-1)[0];
+// last([1,2,3]) -> 3
+```
+
+[⬆ back to top](#table-of-contents)
+
+### Median of array of numbers
+
+Find the middle of the array, use `Array.sort()` to sort the values.
+Return the number at the midpoint if `length` is odd, otherwise the average of the two middle numbers.
+
+```js
+const median = arr => {
+  const mid = Math.floor(arr.length / 2), nums = arr.sort((a, b) => a - b);
+  return arr.length % 2 !== 0 ? nums[mid] : (nums[mid - 1] + nums[mid]) / 2;
+};
+// median([5,6,50,1,-5]) -> 5
+// median([0,10,-2,7]) -> 3.5
+```
+
+[⬆ back to top](#table-of-contents)
+
+### Pick
+
+Use `Array.reduce()` to convert the filtered/picked keys back to a object with the corresponding key:value pair if the key exist in the obj.
+
+```js
+const pick = (obj, arr) =>
+  arr.reduce((acc, curr) => (curr in obj && (acc[curr] = obj[curr]), acc), {});
+// pick({ 'a': 1, 'b': '2', 'c': 3 }, ['a', 'c']) -> { 'a': 1, 'c': 3 }
+// pick(object, ['a', 'c'])['a'] -> 1
+```
+
+[⬆ back to top](#table-of-contents)
+
+### Shuffle array
+
+Use `Array.sort()` to reorder elements, using `Math.random()` in the comparator.
+
+```js
+const shuffle = arr => arr.sort(() => Math.random() - 0.5);
+// shuffle([1,2,3]) -> [2,3,1]
+```
+
+[⬆ back to top](#table-of-contents)
+
+### Similarity between arrays
+
+Use `filter()` to remove values that are not part of `values`, determined using `includes()`.
+
+```js
+const similarity = (arr, values) => arr.filter(v => values.includes(v));
+// similarity([1,2,3], [1,2,4]) -> [1,2]
+```
+
+[⬆ back to top](#table-of-contents)
+
+### Sum of array of numbers
+
+Use `Array.reduce()` to add each value to an accumulator, initialized with a value of `0`.
+
+```js
+const sum = arr => arr.reduce((acc, val) => acc + val, 0);
+// sum([1,2,3,4]) -> 10
+```
+
+[⬆ back to top](#table-of-contents)
+
+### Tail of list
+
+Return `arr.slice(1)` if the array's `length` is more than `1`, otherwise return the whole array.
+
+```js
+const tail = arr => arr.length > 1 ? arr.slice(1) : arr;
+// tail([1,2,3]) -> [2,3]
+// tail([1]) -> [1]
+```
+
+[⬆ back to top](#table-of-contents)
+
+### Take
+
+Use `Array.slice()` to create a slice of the array with `n` elements taken from the beginning.
+
+```js
+const take = (arr, n = 1) => arr.slice(0, n);
+// take([1, 2, 3], 5) -> [1, 2, 3]
+// take([1, 2, 3], 0) -> []
+```
+
+[⬆ back to top](#table-of-contents)
+
+### Unique values of array
+
+Use ES6 `Set` and the `...rest` operator to discard all duplicated values.
+
+```js
+const unique = arr => [...new Set(arr)];
+// unique([1,2,2,3,4,4,5]) -> [1,2,3,4,5]
+```
+
+[⬆ back to top](#table-of-contents)
+## Browser
+
+### Bottom visible
+
+Use `scrollY`, `scrollHeight` and `clientHeight` to determine if the bottom of the page is visible.
+
+```js
+const bottomVisible = _ =>
+  document.documentElement.clientHeight + window.scrollY >= document.documentElement.scrollHeight || document.documentElement.clientHeight;
+// bottomVisible() -> true
+```
+
+[⬆ back to top](#table-of-contents)
+
+### Current URL
+
+Use `window.location.href` to get current URL.
+
+```js
+const currentUrl = _ => window.location.href;
+// currentUrl() -> 'https://google.com'
+```
+
+[⬆ back to top](#table-of-contents)
+
 ### Element is visible in viewport
 
 Use `Element.getBoundingClientRect()` and the `window.inner(Width|Height)` values
@@ -362,129 +513,7 @@ const elementIsVisibleInViewport = (el, partiallyVisible = false) => {
 ```
 
 [⬆ back to top](#table-of-contents)
-### Escape regular expression
 
-Use `replace()` to escape special characters.
-
-```js
-const escapeRegExp = str => str.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
-// escapeRegExp('(test)') -> \\(test\\)
-```
-
-[⬆ back to top](#table-of-contents)
-### Even or odd number
-
-Checks whether a number is odd or even using the modulo (`%`) operator.
-Returns `true` if the number is even, `false` if the number is odd.
-
-```js
-const isEven = num => num % 2 === 0;
-// isEven(3) -> false
-```
-
-[⬆ back to top](#table-of-contents)
-### Factorial
-
-Use recursion.
-If `n` is less than or equal to `1`, return `1`.
-Otherwise, return the product of `n` and the factorial of `n - 1`.
-
-```js
-const factorial = n => n <= 1 ? 1 : n * factorial(n - 1);
-// factorial(6) -> 720
-```
-
-[⬆ back to top](#table-of-contents)
-### Fibonacci array generator
-
-Create an empty array of the specific length, initializing the first two values (`0` and `1`).
-Use `Array.reduce()` to add values into the array, using the sum of the last two values, except for the first two.
-
-```js
-const fibonacci = n =>
-  Array(n).fill(0).reduce((acc, val, i) => acc.concat(i > 1 ? acc[i - 1] + acc[i - 2] : i), []);
-// fibonacci(5) -> [0,1,1,2,3]
-```
-
-[⬆ back to top](#table-of-contents)
-### Fill array
-
-Use `Array.map()` to map values between `start` (inclusive) and `end` (exclusive) to `value`.
-Omit `start` to start at the first element and/or `end` to finish at the last.
-
-```js
-const fillArray = (arr, value, start = 0, end = arr.length) => 
-  arr.map((v,i) => i>=start && i<end ? value : v);
-// fillArray([1,2,3,4],'8',1,3) -> [1,'8','8',4]
-```
-
-[⬆ back to top](#table-of-contents)
-### Filter out non-unique values in an array
-
-Use `Array.filter()` for an array containing only the unique values.
-
-```js
-const filterNonUnique = arr => arr.filter(i => arr.indexOf(i) === arr.lastIndexOf(i));
-// filterNonUnique([1,2,2,3,4,4,5]) -> [1,3,5]
-```
-
-[⬆ back to top](#table-of-contents)
-### Flatten array up to depth
-
-Use recursion, decrementing `depth` by 1 for each level of depth.
-Use `Array.reduce()` and `Array.concat()` to merge elements or arrays.
-Base case, for `depth` equal to `1` stops recursion.
-Omit the second element, `depth` to flatten only to a depth of `1` (single flatten).
-
-```js
-const flattenDepth = (arr, depth = 1) =>
-  depth != 1 ? arr.reduce((a, v) => a.concat(Array.isArray(v) ? flattenDepth (v, depth-1) : v), []) 
-  : arr.reduce((a,v) => a.concat(v),[]);
-// flattenDepth([1,[2],[[[3],4],5]], 2) -> [1,2,[3],4,5]
-```
-
-[⬆ back to top](#table-of-contents)
-### Flatten array
-
-Use `Array.reduce()` to get all elements inside the array and `concat()` to flatten them.
-
-```js
-const flatten = arr => arr.reduce((a, v) => a.concat(v), []);
-// flatten([1,[2],3,4]) -> [1,2,3,4]
-```
-
-[⬆ back to top](#table-of-contents)
-### Get max value from array
-
-Use `Math.max()` combined with the spread operator (`...`) to get the maximum value in the array.
-
-```js
-const arrayMax = arr => Math.max(...arr);
-// arrayMax([10, 1, 5]) -> 10
-```
-
-[⬆ back to top](#table-of-contents)
-### Get min value from array
-
-Use `Math.min()` combined with the spread operator (`...`) to get the minimum value in the array.
-
-```js
-const arrayMin = arr => Math.min(...arr);
-// arrayMin([10, 1, 5]) -> 1
-```
-
-[⬆ back to top](#table-of-contents)
-### Get native type of value
-
-Returns lower-cased constructor name of value, "undefined" or "null" if value is undefined or null
-
-```js
-const getType = v =>
-  v === undefined ? 'undefined' : v === null ? 'null' : v.constructor.name.toLowerCase();
-// getType(new Set([1,2,3])) -> "set"
-```
-
-[⬆ back to top](#table-of-contents)
 ### Get scroll position
 
 Use `pageXOffset` and `pageYOffset` if they are defined, otherwise `scrollLeft` and `scrollTop`.
@@ -498,254 +527,67 @@ const getScrollPos = (el = window) =>
 ```
 
 [⬆ back to top](#table-of-contents)
-### Greatest common divisor (GCD)
+
+undefined
+[⬆ back to top](#table-of-contents)
+
+### Scroll to top
+
+Get distance from top using `document.documentElement.scrollTop` or `document.body.scrollTop`.
+Scroll by a fraction of the distance from top. Use `window.requestAnimationFrame()` to animate the scrolling.
+
+```js
+const scrollToTop = _ => {
+  const c = document.documentElement.scrollTop || document.body.scrollTop;
+  if (c > 0) {
+    window.requestAnimationFrame(scrollToTop);
+    window.scrollTo(0, c - c / 8);
+  }
+};
+// scrollToTop()
+```
+
+[⬆ back to top](#table-of-contents)
+## Function
+
+### Chain asynchronous functions
+
+Loop through an array of functions containing asynchronous events, calling `next` when each asynchronous event has completed.
+
+```js
+const chainAsync = fns => { let curr = 0; const next = () => fns[curr++](next); next(); };
+/*
+chainAsync([
+  next => { console.log('0 seconds'); setTimeout(next, 1000); },
+  next => { console.log('1 second');  setTimeout(next, 1000); },
+  next => { console.log('2 seconds'); }
+])
+*/
+```
+
+[⬆ back to top](#table-of-contents)
+
+### Curry
 
 Use recursion.
-Base case is when `y` equals `0`. In this case, return `x`.
-Otherwise, return the GCD of `y` and the remainder of the division `x/y`.
+If the number of provided arguments (`args`) is sufficient, call the passed function `f`.
+Otherwise return a curried function `f` that expects the rest of the arguments.
+If you want to curry a function that accepts a variable number of arguments (a variadic function, e.g. `Math.min()`), you can optionally pass the number of arguments to the second parameter `arity`.
 
 ```js
-const gcd = (x, y) => !y ? x : gcd(y, x % y);
-// gcd (8, 36) -> 4
+const curry = (f, arity = f.length, next) =>
+  (next = prevArgs =>
+    nextArg => {
+      const args = [ ...prevArgs, nextArg ];
+      return args.length >= arity ? f(...args) : next(args);
+    }
+  )([]);
+// curry(Math.pow)(2)(10) -> 1024
+// curry(Math.min, 3)(10)(50)(2) -> 2
 ```
 
 [⬆ back to top](#table-of-contents)
-### Group by
 
-Use `Array.map()` to map the values of an array to a function or property name.
-Use `Array.reduce()` to create an object, where the keys are produced from the mapped results.
-
-```js
-const groupBy = (arr, func) =>
-  arr.map(typeof func === 'function' ? func : val => val[func])
-    .reduce((acc, val, i) => { acc[val] = (acc[val] || []).concat(arr[i]); return acc; }, {});
-// groupBy([6.1, 4.2, 6.3], Math.floor) -> {4: [4.2], 6: [6.1, 6.3]}
-// groupBy(['one', 'two', 'three'], 'length') -> {3: ['one', 'two'], 5: ['three']}
-```
-
-[⬆ back to top](#table-of-contents)
-### Hamming distance
-
-Use XOR operator (`^`) to find the bit difference between the two numbers, convert to binary string using `toString(2)`.
-Count and return the number of `1`s in the string, using `match(/1/g)`.
-
-```js
-const hammingDistance = (num1, num2) =>
-  ((num1 ^ num2).toString(2).match(/1/g) || '').length;
-// hammingDistance(2,3) -> 1
-```
-
-[⬆ back to top](#table-of-contents)
-### Head of list
-
-Use `arr[0]` to return the first element of the passed array.
-
-```js
-const head = arr => arr[0];
-// head([1,2,3]) -> 1
-```
-
-[⬆ back to top](#table-of-contents)
-### Initial of list
-
-Use `arr.slice(0,-1)`to return all but the last element of the array.
-
-```js
-const initial = arr => arr.slice(0, -1);
-// initial([1,2,3]) -> [1,2]
-```
-
-[⬆ back to top](#table-of-contents)
-### Initialize array with range
-
-Use `Array(end-start)` to create an array of the desired length, `Array.map()` to fill with the desired values in a range.
-You can omit `start` to use a default value of `0`.
-
-```js
-const initializeArrayRange = (end, start = 0) =>
-  Array.apply(null, Array(end - start)).map((v, i) => i + start);
-// initializeArrayRange(5) -> [0,1,2,3,4]
-```
-
-[⬆ back to top](#table-of-contents)
-### Initialize array with values
-
-Use `Array(n)` to create an array of the desired length, `fill(v)` to fill it with the desired values.
-You can omit `value` to use a default value of `0`.
-
-```js
-const initializeArray = (n, value = 0) => Array(n).fill(value);
-// initializeArray(5, 2) -> [2,2,2,2,2]
-```
-
-[⬆ back to top](#table-of-contents)
-### Is array
-
-Use `Array.isArray()` to check if a value is classified as an array.
-
-```js
-const isArray = val => val && Array.isArray(val);
-// isArray(null) -> false
-// isArray([1]) -> true
-```
-
-[⬆ back to top](#table-of-contents)
-### Is boolean
-
-Use `typeof` to check if a value is classified as a boolean primitive.
-
-```js
-const isBoolean = val => typeof val === 'boolean';
-// isBoolean(null) -> false
-// isBoolean(false) -> true
-```
-
-[⬆ back to top](#table-of-contents)
-### Is function
-
-Use `typeof` to check if a value is classified as a function primitive.
-
-```js
-const isFunction = val => val && typeof val === 'function';
-// isFunction('x') -> false
-// isFunction(x => x) -> true
-```
-
-[⬆ back to top](#table-of-contents)
-### Is number
-
-Use `typeof` to check if a value is classified as a number primitive.
-
-```js
-const isNumber = val => typeof val === 'number';
-// isNumber('1') -> false
-// isNumber(1) -> true
-```
-
-[⬆ back to top](#table-of-contents)
-### Is string
-
-Use `typeof` to check if a value is classified as a string primitive.
-
-```js
-const isString = val => typeof val === 'string';
-// isString(10) -> false
-// isString('10') -> true
-```
-
-[⬆ back to top](#table-of-contents)
-### Is symbol
-
-Use `typeof` to check if a value is classified as a symbol primitive.
-
-```js
-const isSymbol = val => typeof val === 'symbol';
-// isSymbol('x') -> false
-// isSymbol(Symbol('x')) -> true
-```
-
-[⬆ back to top](#table-of-contents)
-### Last of list
-
-Use `arr.slice(-1)[0]` to get the last element of the given array.
-
-```js
-const last = arr => arr.slice(-1)[0];
-// last([1,2,3]) -> 3
-```
-
-[⬆ back to top](#table-of-contents)
-### Measure time taken by function
-
-Use `performance.now()` to get start and end time for the function, `console.log()` the time taken.
-Pass a callback function as the argument.
-
-```js
-const timeTaken = callback => {
-  const t0 = performance.now(), r = callback();
-  console.log(performance.now() - t0);
-  return r;
-};
-// timeTaken(() => Math.pow(2, 10)) -> 1024 (0.010000000009313226 logged in console)
-```
-
-[⬆ back to top](#table-of-contents)
-### Median of array of numbers
-
-Find the middle of the array, use `Array.sort()` to sort the values.
-Return the number at the midpoint if `length` is odd, otherwise the average of the two middle numbers.
-
-```js
-const median = arr => {
-  const mid = Math.floor(arr.length / 2), nums = arr.sort((a, b) => a - b);
-  return arr.length % 2 !== 0 ? nums[mid] : (nums[mid - 1] + nums[mid]) / 2;
-};
-// median([5,6,50,1,-5]) -> 5
-// median([0,10,-2,7]) -> 3.5
-```
-
-[⬆ back to top](#table-of-contents)
-### Object from key-value pairs
-
-Use `Array.reduce()` to create and combine key-value pairs.
-
-```js
-const objectFromPairs = arr => arr.reduce((a, v) => (a[v[0]] = v[1], a), {});
-// objectFromPairs([['a',1],['b',2]]) -> {a: 1, b: 2}
-```
-
-[⬆ back to top](#table-of-contents)
-### Object to key-value pairs
-
-Use `Object.keys()` and `Array.map()` to iterate over the object's keys and produce an array with key-value pairs.
-
-```js
-const objectToPairs = obj => Object.keys(obj).map(k => [k, obj[k]]);
-// objectToPairs({a: 1, b: 2}) -> [['a',1],['b',2]])
-```
-
-[⬆ back to top](#table-of-contents)
-### Ordinal suffix of number
-
-Use the modulo operator (`%`) to find values of single and tens digits.
-Find which ordinal pattern digits match.
-If digit is found in teens pattern, use teens ordinal.
-
-```js
-const toOrdinalSuffix = num => {
-  const int = parseInt(num), digits = [(int % 10), (int % 100)],
-    ordinals = ["st", "nd", "rd", "th"], oPattern = [1,2,3,4],
-    tPattern = [11, 12, 13, 14, 15, 16, 17, 18, 19]
-  return oPattern.includes(digits[0]) && !tPattern.includes(digits[1]) ? int + ordinals[digits[0]-1] : int + ordinals[3];
-}
-// toOrdinalSuffix("123") -> "123rd"
-```
-
-[⬆ back to top](#table-of-contents)
-### Percentile
-
-Use `Array.reduce()` to calculate how many numbers are below the value and how many are the same value and
-apply the percentile formula.
-
-```js
-const percentile = (arr, val) => 
-  100 * arr.reduce((acc,v) => acc + (v < val ? 1 : 0) + (v === val ? 0.5 : 0), 0) / arr.length;
-// percentile([1,2,3,4,5,6,7,8,9,10], 6) -> 55
- ```
-
-[⬆ back to top](#table-of-contents)
-### Pick
-
-Use `Array.reduce()` to convert the filtered/picked keys back to a object with the corresponding key:value pair if the key exist in the obj.
-
-```js
-const pick = (obj, arr) =>
-  arr.reduce((acc, curr) => (curr in obj && (acc[curr] = obj[curr]), acc), {});
-// pick({ 'a': 1, 'b': '2', 'c': 3 }, ['a', 'c']) -> { 'a': 1, 'c': 3 }
-// pick(object, ['a', 'c'])['a'] -> 1
-```
-
-[⬆ back to top](#table-of-contents)
 ### Pipe
 
 Use `Array.reduce()` to pass value through functions.
@@ -756,17 +598,7 @@ const pipe = (...funcs) => arg => funcs.reduce((acc, func) => func(acc), arg);
 ```
 
 [⬆ back to top](#table-of-contents)
-### Powerset
 
-Use `Array.reduce()` combined with `Array.map()` to iterate over elements and combine into an array containing all combinations.
-
-```js
-const powerset = arr =>
-  arr.reduce((a, v) => a.concat(a.map(r => [v].concat(r))), [[]]);
-// powerset([1,2]) -> [[], [1], [2], [2,1]]
-```
-
-[⬆ back to top](#table-of-contents)
 ### Promisify
 
 Use currying to return a function returning a `Promise` that calls the original function. 
@@ -786,59 +618,7 @@ const promisify = func =>
 ```
 
 [⬆ back to top](#table-of-contents)
-### Random integer in range
 
-Use `Math.random()` to generate a random number and map it to the desired range, using `Math.floor()` to make it an integer.
-
-```js
-const randomIntegerInRange = (min, max) => Math.floor(Math.random() * (max - min + 1)) + min;
-// randomIntegerInRange(0, 5) -> 2
-```
-
-[⬆ back to top](#table-of-contents)
-### Random number in range
-
-Use `Math.random()` to generate a random value, map it to the desired range using multiplication.
-
-```js
-const randomInRange = (min, max) => Math.random() * (max - min) + min;
-// randomInRange(2,10) -> 6.0211363285087005
-```
-
-[⬆ back to top](#table-of-contents)
-### Redirect to URL
-
-Use `window.location.href` or `window.location.replace()` to redirect to `url`.
-Pass a second argument to simulate a link click (`true` - default) or an HTTP redirect (`false`).
-
-```js
-const redirect = (url, asLink = true) =>
-  asLink ? window.location.href = url : window.location.replace(url);
-// redirect('https://google.com')
-```
-
-[⬆ back to top](#table-of-contents)
-### Reverse a string
-
-Use array destructuring and `Array.reverse()` to reverse the order of the characters in the string.
-Combine characters to get a string using `join('')`.
-
-```js
-const reverseString = str => [...str].reverse().join('');
-// reverseString('foobar') -> 'raboof'
-```
-
-[⬆ back to top](#table-of-contents)
-### RGB to hexadecimal
-
-Convert given RGB parameters to hexadecimal string using bitwise left-shift operator (`<<`) and `toString(16)`, then `padStart(6,'0')` to get a 6-digit hexadecimal value.
-
-```js
-const rgbToHex = (r, g, b) => ((r << 16) + (g << 8) + b).toString(16).padStart(6, '0');
-// rgbToHex(255, 165, 1) -> 'ffa501'
-```
-
-[⬆ back to top](#table-of-contents)
 ### Run promises in series
 
 Run an array of promises in series using `Array.reduce()` by creating a promise chain, where each promise returns the next promise when resolved.
@@ -850,43 +630,7 @@ const series = ps => ps.reduce((p, next) => p.then(next), Promise.resolve());
 ```
 
 [⬆ back to top](#table-of-contents)
-### Scroll to top
 
-Get distance from top using `document.documentElement.scrollTop` or `document.body.scrollTop`.
-Scroll by a fraction of the distance from top. Use `window.requestAnimationFrame()` to animate the scrolling.
-
-```js
-const scrollToTop = _ => {
-  const c = document.documentElement.scrollTop || document.body.scrollTop;
-  if (c > 0) {
-    window.requestAnimationFrame(scrollToTop);
-    window.scrollTo(0, c - c / 8);
-  }
-};
-// scrollToTop()
-```
-
-[⬆ back to top](#table-of-contents)
-### Shuffle array
-
-Use `Array.sort()` to reorder elements, using `Math.random()` in the comparator.
-
-```js
-const shuffle = arr => arr.sort(() => Math.random() - 0.5);
-// shuffle([1,2,3]) -> [2,3,1]
-```
-
-[⬆ back to top](#table-of-contents)
-### Similarity between arrays
-
-Use `filter()` to remove values that are not part of `values`, determined using `includes()`.
-
-```js
-const similarity = (arr, values) => arr.filter(v => values.includes(v));
-// similarity([1,2,3], [1,2,4]) -> [1,2]
-```
-
-[⬆ back to top](#table-of-contents)
 ### Sleep
 
 Delay executing part of an `async` function, by putting it to sleep, returning a `Promise`.
@@ -903,17 +647,131 @@ async function sleepyWork() {
 ```
 
 [⬆ back to top](#table-of-contents)
-### Sort characters in string (alphabetical)
+## Math
 
-Split the string using `split('')`, `Array.sort()` utilizing `localeCompare()`, recombine using `join('')`.
+### Collatz algorithm
+
+If `n` is even, return `n/2`. Otherwise  return `3n+1`.
 
 ```js
-const sortCharactersInString = str =>
-  str.split('').sort((a, b) => a.localeCompare(b)).join('');
-// sortCharactersInString('cabbage') -> 'aabbceg'
+const collatz = n => (n % 2 == 0) ? (n/2) : (3*n+1); 
+// collatz(8) --> 4
+// collatz(5) --> 16
 ```
 
 [⬆ back to top](#table-of-contents)
+
+### Distance between two points
+
+Use `Math.hypot()` to calculate the Euclidean distance between two points.
+
+```js
+const distance = (x0, y0, x1, y1) => Math.hypot(x1 - x0, y1 - y0);
+// distance(1,1, 2,3) -> 2.23606797749979
+```
+
+[⬆ back to top](#table-of-contents)
+
+### Divisible by number
+
+Use the modulo operator (`%`) to check if the remainder is equal to `0`.
+
+```js
+const isDivisible = (dividend, divisor) => dividend % divisor === 0;
+// isDivisible(6,3) -> true
+```
+
+[⬆ back to top](#table-of-contents)
+
+### Even or odd number
+
+Checks whether a number is odd or even using the modulo (`%`) operator.
+Returns `true` if the number is even, `false` if the number is odd.
+
+```js
+const isEven = num => num % 2 === 0;
+// isEven(3) -> false
+```
+
+[⬆ back to top](#table-of-contents)
+
+### Factorial
+
+Use recursion.
+If `n` is less than or equal to `1`, return `1`.
+Otherwise, return the product of `n` and the factorial of `n - 1`.
+
+```js
+const factorial = n => n <= 1 ? 1 : n * factorial(n - 1);
+// factorial(6) -> 720
+```
+
+[⬆ back to top](#table-of-contents)
+
+### Fibonacci array generator
+
+Create an empty array of the specific length, initializing the first two values (`0` and `1`).
+Use `Array.reduce()` to add values into the array, using the sum of the last two values, except for the first two.
+
+```js
+const fibonacci = n =>
+  Array(n).fill(0).reduce((acc, val, i) => acc.concat(i > 1 ? acc[i - 1] + acc[i - 2] : i), []);
+// fibonacci(5) -> [0,1,1,2,3]
+```
+
+[⬆ back to top](#table-of-contents)
+
+### Greatest common divisor (GCD)
+
+Use recursion.
+Base case is when `y` equals `0`. In this case, return `x`.
+Otherwise, return the GCD of `y` and the remainder of the division `x/y`.
+
+```js
+const gcd = (x, y) => !y ? x : gcd(y, x % y);
+// gcd (8, 36) -> 4
+```
+
+[⬆ back to top](#table-of-contents)
+
+### Hamming distance
+
+Use XOR operator (`^`) to find the bit difference between the two numbers, convert to binary string using `toString(2)`.
+Count and return the number of `1`s in the string, using `match(/1/g)`.
+
+```js
+const hammingDistance = (num1, num2) =>
+  ((num1 ^ num2).toString(2).match(/1/g) || '').length;
+// hammingDistance(2,3) -> 1
+```
+
+[⬆ back to top](#table-of-contents)
+
+### Percentile
+
+Use `Array.reduce()` to calculate how many numbers are below the value and how many are the same value and
+apply the percentile formula.
+
+```js
+const percentile = (arr, val) => 
+  100 * arr.reduce((acc,v) => acc + (v < val ? 1 : 0) + (v === val ? 0.5 : 0), 0) / arr.length;
+// percentile([1,2,3,4,5,6,7,8,9,10], 6) -> 55
+ ```
+
+[⬆ back to top](#table-of-contents)
+
+### Powerset
+
+Use `Array.reduce()` combined with `Array.map()` to iterate over elements and combine into an array containing all combinations.
+
+```js
+const powerset = arr =>
+  arr.reduce((a, v) => a.concat(a.map(r => [v].concat(r))), [[]]);
+// powerset([1,2]) -> [[], [1], [2], [2,1]]
+```
+
+[⬆ back to top](#table-of-contents)
+
 ### Standard deviation
 
 Use `Array.reduce()` to calculate the mean, variance and the sum of the variance of the values, the variance of the values, then
@@ -933,49 +791,112 @@ const standardDeviation = (arr, usePopulation = false) => {
 ```
 
 [⬆ back to top](#table-of-contents)
-### Sum of array of numbers
+## Object
 
-Use `Array.reduce()` to add each value to an accumulator, initialized with a value of `0`.
+### Object from key-value pairs
+
+Use `Array.reduce()` to create and combine key-value pairs.
 
 ```js
-const sum = arr => arr.reduce((acc, val) => acc + val, 0);
-// sum([1,2,3,4]) -> 10
+const objectFromPairs = arr => arr.reduce((a, v) => (a[v[0]] = v[1], a), {});
+// objectFromPairs([['a',1],['b',2]]) -> {a: 1, b: 2}
 ```
 
 [⬆ back to top](#table-of-contents)
-### Swap values of two variables
 
-Use array destructuring to swap values between two variables.
+### Object to key-value pairs
+
+Use `Object.keys()` and `Array.map()` to iterate over the object's keys and produce an array with key-value pairs.
 
 ```js
-[varA, varB] = [varB, varA];
-// [x, y] = [y, x]
+const objectToPairs = obj => Object.keys(obj).map(k => [k, obj[k]]);
+// objectToPairs({a: 1, b: 2}) -> [['a',1],['b',2]])
 ```
 
 [⬆ back to top](#table-of-contents)
-### Tail of list
+## String
 
-Return `arr.slice(1)` if the array's `length` is more than `1`, otherwise return the whole array.
+### Anagrams of string (with duplicates)
+
+Use recursion.
+For each letter in the given string, create all the partial anagrams for the rest of its letters.
+Use `Array.map()` to combine the letter with each partial anagram, then `Array.reduce()` to combine all anagrams in one array.
+Base cases are for string `length` equal to `2` or `1`.
 
 ```js
-const tail = arr => arr.length > 1 ? arr.slice(1) : arr;
-// tail([1,2,3]) -> [2,3]
-// tail([1]) -> [1]
+const anagrams = str => {
+  if (str.length <= 2) return str.length === 2 ? [str, str[1] + str[0]] : [str];
+  return str.split('').reduce((acc, letter, i) =>
+    acc.concat(anagrams(str.slice(0, i) + str.slice(i + 1)).map(val => letter + val)), []);
+};
+// anagrams('abc') -> ['abc','acb','bac','bca','cab','cba']
 ```
 
 [⬆ back to top](#table-of-contents)
-### Take
 
-Use `Array.slice()` to create a slice of the array with `n` elements taken from the beginning.
+### Capitalize first letter of every word
+
+Use `replace()` to match the first character of each word and `toUpperCase()` to capitalize it.
 
 ```js
-const take = (arr, n = 1) => arr.slice(0, n);
-
-// take([1, 2, 3], 5) -> [1, 2, 3]
-// take([1, 2, 3], 0) -> []
+const capitalizeEveryWord = str => str.replace(/\b[a-z]/g, char => char.toUpperCase());
+// capitalizeEveryWord('hello world!') -> 'Hello World!'
 ```
 
 [⬆ back to top](#table-of-contents)
+
+### Capitalize first letter
+
+Use `slice(0,1)` and `toUpperCase()` to capitalize first letter, `slice(1)` to get the rest of the string.
+Omit the `lowerRest` parameter to keep the rest of the string intact, or set it to `true` to convert to lower case.
+
+```js
+const capitalize = (str, lowerRest = false) =>
+  str.slice(0, 1).toUpperCase() + (lowerRest ? str.slice(1).toLowerCase() : str.slice(1));
+// capitalize('myName', true) -> 'Myname'
+```
+
+[⬆ back to top](#table-of-contents)
+
+### Check for palindrome
+
+Convert string `toLowerCase()` and use `replace()` to remove non-alphanumeric characters from it.
+Then, `split('')` into individual characters, `reverse()`, `join('')` and compare to the original, unreversed string, after converting it `tolowerCase()`.
+
+```js
+const palindrome = str => {
+  const s = str.toLowerCase().replace(/[\W_]/g,'');
+  return s === s.split('').reverse().join('');
+}
+// palindrome('taco cat') -> true
+ ```
+
+[⬆ back to top](#table-of-contents)
+
+### Reverse a string
+
+Use array destructuring and `Array.reverse()` to reverse the order of the characters in the string.
+Combine characters to get a string using `join('')`.
+
+```js
+const reverseString = str => [...str].reverse().join('');
+// reverseString('foobar') -> 'raboof'
+```
+
+[⬆ back to top](#table-of-contents)
+
+### Sort characters in string (alphabetical)
+
+Split the string using `split('')`, `Array.sort()` utilizing `localeCompare()`, recombine using `join('')`.
+
+```js
+const sortCharactersInString = str =>
+  str.split('').sort((a, b) => a.localeCompare(b)).join('');
+// sortCharactersInString('cabbage') -> 'aabbceg'
+```
+
+[⬆ back to top](#table-of-contents)
+
 ### Truncate a String
 
 Determine if the string's `length` is greater than `num`.
@@ -988,16 +909,181 @@ const truncate = (str, num) =>
 ```
 
 [⬆ back to top](#table-of-contents)
-### Unique values of array
+## Utility
 
-Use ES6 `Set` and the `...rest` operator to discard all duplicated values.
+### Escape regular expression
+
+Use `replace()` to escape special characters.
 
 ```js
-const unique = arr => [...new Set(arr)];
-// unique([1,2,2,3,4,4,5]) -> [1,2,3,4,5]
+const escapeRegExp = str => str.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
+// escapeRegExp('(test)') -> \\(test\\)
 ```
 
 [⬆ back to top](#table-of-contents)
+
+### Get native type of value
+
+Returns lower-cased constructor name of value, "undefined" or "null" if value is undefined or null
+
+```js
+const getType = v =>
+  v === undefined ? 'undefined' : v === null ? 'null' : v.constructor.name.toLowerCase();
+// getType(new Set([1,2,3])) -> "set"
+```
+
+[⬆ back to top](#table-of-contents)
+
+### Is array
+
+Use `Array.isArray()` to check if a value is classified as an array.
+
+```js
+const isArray = val => val && Array.isArray(val);
+// isArray(null) -> false
+// isArray([1]) -> true
+```
+
+[⬆ back to top](#table-of-contents)
+
+### Is boolean
+
+Use `typeof` to check if a value is classified as a boolean primitive.
+
+```js
+const isBoolean = val => typeof val === 'boolean';
+// isBoolean(null) -> false
+// isBoolean(false) -> true
+```
+
+[⬆ back to top](#table-of-contents)
+
+### Is function
+
+Use `typeof` to check if a value is classified as a function primitive.
+
+```js
+const isFunction = val => val && typeof val === 'function';
+// isFunction('x') -> false
+// isFunction(x => x) -> true
+```
+
+[⬆ back to top](#table-of-contents)
+
+### Is number
+
+Use `typeof` to check if a value is classified as a number primitive.
+
+```js
+const isNumber = val => typeof val === 'number';
+// isNumber('1') -> false
+// isNumber(1) -> true
+```
+
+[⬆ back to top](#table-of-contents)
+
+### Is string
+
+Use `typeof` to check if a value is classified as a string primitive.
+
+```js
+const isString = val => typeof val === 'string';
+// isString(10) -> false
+// isString('10') -> true
+```
+
+[⬆ back to top](#table-of-contents)
+
+### Is symbol
+
+Use `typeof` to check if a value is classified as a symbol primitive.
+
+```js
+const isSymbol = val => typeof val === 'symbol';
+// isSymbol('x') -> false
+// isSymbol(Symbol('x')) -> true
+```
+
+[⬆ back to top](#table-of-contents)
+
+### Measure time taken by function
+
+Use `performance.now()` to get start and end time for the function, `console.log()` the time taken.
+Pass a callback function as the argument.
+
+```js
+const timeTaken = callback => {
+  const t0 = performance.now(), r = callback();
+  console.log(performance.now() - t0);
+  return r;
+};
+// timeTaken(() => Math.pow(2, 10)) -> 1024 (0.010000000009313226 logged in console)
+```
+
+[⬆ back to top](#table-of-contents)
+
+### Ordinal suffix of number
+
+Use the modulo operator (`%`) to find values of single and tens digits.
+Find which ordinal pattern digits match.
+If digit is found in teens pattern, use teens ordinal.
+
+```js
+const toOrdinalSuffix = num => {
+  const int = parseInt(num), digits = [(int % 10), (int % 100)],
+    ordinals = ["st", "nd", "rd", "th"], oPattern = [1,2,3,4],
+    tPattern = [11, 12, 13, 14, 15, 16, 17, 18, 19]
+  return oPattern.includes(digits[0]) && !tPattern.includes(digits[1]) ? int + ordinals[digits[0]-1] : int + ordinals[3];
+}
+// toOrdinalSuffix("123") -> "123rd"
+```
+
+[⬆ back to top](#table-of-contents)
+
+### Random integer in range
+
+Use `Math.random()` to generate a random number and map it to the desired range, using `Math.floor()` to make it an integer.
+
+```js
+const randomIntegerInRange = (min, max) => Math.floor(Math.random() * (max - min + 1)) + min;
+// randomIntegerInRange(0, 5) -> 2
+```
+
+[⬆ back to top](#table-of-contents)
+
+### Random number in range
+
+Use `Math.random()` to generate a random value, map it to the desired range using multiplication.
+
+```js
+const randomInRange = (min, max) => Math.random() * (max - min) + min;
+// randomInRange(2,10) -> 6.0211363285087005
+```
+
+[⬆ back to top](#table-of-contents)
+
+### RGB to hexadecimal
+
+Convert given RGB parameters to hexadecimal string using bitwise left-shift operator (`<<`) and `toString(16)`, then `padStart(6,'0')` to get a 6-digit hexadecimal value.
+
+```js
+const rgbToHex = (r, g, b) => ((r << 16) + (g << 8) + b).toString(16).padStart(6, '0');
+// rgbToHex(255, 165, 1) -> 'ffa501'
+```
+
+[⬆ back to top](#table-of-contents)
+
+### Swap values of two variables
+
+Use array destructuring to swap values between two variables.
+
+```js
+[varA, varB] = [varB, varA];
+// [x, y] = [y, x]
+```
+
+[⬆ back to top](#table-of-contents)
+
 ### URL parameters
 
 Use `match()` with an appropriate regular expression to get all key-value pairs, `Array.reduce()` to map and combine them into a single object.
@@ -1012,6 +1098,7 @@ const getUrlParameters = url =>
 ```
 
 [⬆ back to top](#table-of-contents)
+
 ### UUID generator
 
 Use `crypto` API to generate a UUID, compliant with [RFC4122](https://www.ietf.org/rfc/rfc4122.txt) version 4.
@@ -1025,6 +1112,7 @@ const uuid = _ =>
 ```
 
 [⬆ back to top](#table-of-contents)
+
 ### Validate email
 
 Use a regular experssion to check if the email is valid.
@@ -1037,6 +1125,7 @@ const validateEmail = str =>
 ```
 
 [⬆ back to top](#table-of-contents)
+
 ### Validate number
 
 Use `!isNaN` in combination with `parseFloat()` to check if the argument is a number.
@@ -1049,6 +1138,7 @@ const validateNumber = n => !isNaN(parseFloat(n)) && isFinite(n) && Number(n) ==
 ```
 
 [⬆ back to top](#table-of-contents)
+
 ### Value or default
 
 Returns value, or default value if passed value is `falsy`.
@@ -1059,6 +1149,7 @@ const valueOrDefault = (value, d) => value || d;
 ```
 
 [⬆ back to top](#table-of-contents)
+
 ## Credits
 
 *Icons made by [Smashicons](https://www.flaticon.com/authors/smashicons) from [www.flaticon.com](https://www.flaticon.com/) is licensed by [CC 3.0 BY](http://creativecommons.org/licenses/by/3.0/).*
diff --git a/scripts/builder.js b/scripts/builder.js
index 220469705..6a15e53a7 100644
--- a/scripts/builder.js
+++ b/scripts/builder.js
@@ -4,7 +4,10 @@ var path = require('path');
 var snippetsPath = './snippets';
 var staticPartsPath = './static-parts';
 
-var snippets = {}, startPart = '', endPart = '', output = '';
+var snippets = {}, startPart = '', endPart = '', output = '', tagDbData = {};
+
+const objectFromPairs = arr => arr.reduce((a, v) => (a[v[0]] = v[1], a), {});
+const capitalize = (str, lowerRest = false) => str.slice(0, 1).toUpperCase() + (lowerRest ? str.slice(1).toLowerCase() : str.slice(1));
 
 console.time('Builder');
 
@@ -39,14 +42,28 @@ catch (err){
   process.exit(1);
 }
 
+try {
+  tagDbData = objectFromPairs(fs.readFileSync('tag_database','utf8').split('\n').slice(0,-1).map(v => v.split(':').slice(0,2)));
+}
+catch (err){
+  console.log('Error during tag database loading: '+err);
+  process.exit(1);
+}
+
 try {
   output += `${startPart+'\n'}`;
-  for(var snippet of Object.entries(snippets))
-    output += `* [${snippet[0][0].toUpperCase() + snippet[0].replace(/-/g,' ').slice(1,snippet[0].length-3)}](#${snippet[0].slice(0,snippet[0].length-3).replace(/\(/g,'').replace(/\)/g,'').toLowerCase()})\n`
-  output += '\n';
-  for(var snippet of Object.entries(snippets))
-    output += `${snippet[1]+'\n[⬆ back to top](#table-of-contents)\n'}`;
-  output += `${endPart+'\n'}`;
+  for(var tag of [...new Set(Object.entries(tagDbData).map(t => t[1]))].sort((a,b) => a.localeCompare(b))){
+    output +=`### ${capitalize(tag, true)}\n`;
+    for(var taggedSnippet of Object.entries(tagDbData).filter(v => v[1] === tag))
+      output += `* [${taggedSnippet[0][0].toUpperCase() + taggedSnippet[0].replace(/-/g,' ').slice(1)}](#${taggedSnippet[0].replace(/\(/g,'').replace(/\)/g,'').toLowerCase()})\n`
+    output += '\n';
+  }
+  for(var tag of [...new Set(Object.entries(tagDbData).map(t => t[1]))].sort((a,b) => a.localeCompare(b))){
+    output +=`## ${capitalize(tag, true)}\n`;
+    for(var taggedSnippet of Object.entries(tagDbData).filter(v => v[1] === tag))
+      output += `\n${snippets[taggedSnippet[0]+'.md']+'\n[⬆ back to top](#table-of-contents)\n'}`;
+  }
+  output += `\n${endPart+'\n'}`;
   fs.writeFileSync('README.md', output);
 }
 catch (err){
diff --git a/scripts/tagger.js b/scripts/tagger.js
index 6e2329e28..ecebce50f 100644
--- a/scripts/tagger.js
+++ b/scripts/tagger.js
@@ -35,11 +35,8 @@ catch (err){
 }
 
 try {
-  tagDbData = objectFromPairs(fs.readFileSync('tag_database','utf8').split('\n').map(v => v.split(':').slice(0,2)));
-  // for(var tag of [...new Set(Object.entries(tagDbData).map(x => x[1]))])
-  //   tagDbStats[tag] = Object.values(tagDbData).filter(v => v === tag);
-  // console.log(tagDbStats);
-  tagDbStats = Object.entries(tagDbData).reduce((acc, val) => {acc.hasOwnProperty(val[1]) ? acc[val[1]]++ : acc[val[1]] = 1; return acc;}, {});
+  tagDbData = objectFromPairs(fs.readFileSync('tag_database','utf8').split('\n').slice(0,-1).map(v => v.split(':').slice(0,2)));
+  tagDbStats = Object.entries(tagDbData).sort((a,b) => a[1].localeCompare(b[1])).reduce((acc, val) => {acc.hasOwnProperty(val[1]) ? acc[val[1]]++ : acc[val[1]] = 1; return acc;}, {});
 }
 catch (err){
   console.log('Error during tag database loading: '+err);
@@ -61,7 +58,7 @@ catch (err){
   console.log('Error during README generation: '+err);
   process.exit(1);
 }
-console.log(`\n===Tag database statistics===`)
+console.log(`\n=== TAG STATS ===`)
 for(var tagData of Object.entries(tagDbStats).filter(v => v[0] !== 'undefined')){
   console.log(`${chalk.green(tagData[0])}: ${tagData[1]} snippets`);
 }

From cd4d6ba9e850ebd38cf038cfea940be7154ee133 Mon Sep 17 00:00:00 2001
From: Angelos Chalaris <chalarangelo@gmail.com>
Date: Thu, 14 Dec 2017 19:02:15 +0200
Subject: [PATCH 17/23] Fixed build script to exclude untagged snippets

---
 README.md          | 14 ++++++++++++--
 scripts/builder.js |  4 ++--
 tag_database       |  2 +-
 3 files changed, 15 insertions(+), 5 deletions(-)

diff --git a/README.md b/README.md
index 46fcf2e14..ba9eb3cfd 100644
--- a/README.md
+++ b/README.md
@@ -46,7 +46,7 @@
 * [Current URL](#current-url)
 * [Element is visible in viewport](#element-is-visible-in-viewport)
 * [Get scroll position](#get-scroll-position)
-* [Redirect to URL](#redirect-to-url)
+* [Redirect to url](#redirect-to-url)
 * [Scroll to top](#scroll-to-top)
 
 ### Function
@@ -528,7 +528,17 @@ const getScrollPos = (el = window) =>
 
 [⬆ back to top](#table-of-contents)
 
-undefined
+### Redirect to URL
+
+Use `window.location.href` or `window.location.replace()` to redirect to `url`.
+Pass a second argument to simulate a link click (`true` - default) or an HTTP redirect (`false`).
+
+```js
+const redirect = (url, asLink = true) =>
+  asLink ? window.location.href = url : window.location.replace(url);
+// redirect('https://google.com')
+```
+
 [⬆ back to top](#table-of-contents)
 
 ### Scroll to top
diff --git a/scripts/builder.js b/scripts/builder.js
index 6a15e53a7..ba345e67f 100644
--- a/scripts/builder.js
+++ b/scripts/builder.js
@@ -52,13 +52,13 @@ catch (err){
 
 try {
   output += `${startPart+'\n'}`;
-  for(var tag of [...new Set(Object.entries(tagDbData).map(t => t[1]))].sort((a,b) => a.localeCompare(b))){
+  for(var tag of [...new Set(Object.entries(tagDbData).map(t => t[1]))].filter(v => v).sort((a,b) => a.localeCompare(b))){
     output +=`### ${capitalize(tag, true)}\n`;
     for(var taggedSnippet of Object.entries(tagDbData).filter(v => v[1] === tag))
       output += `* [${taggedSnippet[0][0].toUpperCase() + taggedSnippet[0].replace(/-/g,' ').slice(1)}](#${taggedSnippet[0].replace(/\(/g,'').replace(/\)/g,'').toLowerCase()})\n`
     output += '\n';
   }
-  for(var tag of [...new Set(Object.entries(tagDbData).map(t => t[1]))].sort((a,b) => a.localeCompare(b))){
+  for(var tag of [...new Set(Object.entries(tagDbData).map(t => t[1]))].filter(v => v).sort((a,b) => a.localeCompare(b))){
     output +=`## ${capitalize(tag, true)}\n`;
     for(var taggedSnippet of Object.entries(tagDbData).filter(v => v[1] === tag))
       output += `\n${snippets[taggedSnippet[0]+'.md']+'\n[⬆ back to top](#table-of-contents)\n'}`;
diff --git a/tag_database b/tag_database
index 5619a0369..ef62da213 100644
--- a/tag_database
+++ b/tag_database
@@ -58,7 +58,7 @@ powerset:math
 promisify:function
 random-integer-in-range:utility
 random-number-in-range:utility
-redirect-to-URL:browser
+redirect-to-url:browser
 reverse-a-string:string
 RGB-to-hexadecimal:utility
 run-promises-in-series:function

From 2350460ed666c7ead54780ecf7f23c0b9925e664 Mon Sep 17 00:00:00 2001
From: Angelos Chalaris <chalarangelo@gmail.com>
Date: Thu, 14 Dec 2017 19:05:14 +0200
Subject: [PATCH 18/23] Tag and build README

---
 README.md    | 2 +-
 tag_database | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/README.md b/README.md
index e80f512da..190b57a2e 100644
--- a/README.md
+++ b/README.md
@@ -46,7 +46,7 @@
 * [Current URL](#current-url)
 * [Element is visible in viewport](#element-is-visible-in-viewport)
 * [Get scroll position](#get-scroll-position)
-* [Redirect to url](#redirect-to-url)
+* [Redirect to URL](#redirect-to-url)
 * [Scroll to top](#scroll-to-top)
 
 ### Function
diff --git a/tag_database b/tag_database
index ef62da213..5619a0369 100644
--- a/tag_database
+++ b/tag_database
@@ -58,7 +58,7 @@ powerset:math
 promisify:function
 random-integer-in-range:utility
 random-number-in-range:utility
-redirect-to-url:browser
+redirect-to-URL:browser
 reverse-a-string:string
 RGB-to-hexadecimal:utility
 run-promises-in-series:function

From 0a2175e00ef3b4ed145c0af36b582c550c1c7542 Mon Sep 17 00:00:00 2001
From: Angelos Chalaris <chalarangelo@gmail.com>
Date: Thu, 14 Dec 2017 19:24:17 +0200
Subject: [PATCH 19/23] Consistency for tools

---
 CONTRIBUTING.md                            |  3 +-
 package.json                               |  6 +-
 scripts/build-script.js                    | 79 ++++++++++++++++++++++
 scripts/builder.js                         | 74 --------------------
 scripts/{lintSnippet.js => lint-script.js} |  0
 scripts/tag-script.js                      | 67 ++++++++++++++++++
 scripts/tagger.js                          | 67 ------------------
 7 files changed, 151 insertions(+), 145 deletions(-)
 create mode 100644 scripts/build-script.js
 delete mode 100644 scripts/builder.js
 rename scripts/{lintSnippet.js => lint-script.js} (100%)
 create mode 100644 scripts/tag-script.js
 delete mode 100644 scripts/tagger.js

diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index d2bdbf7e1..4a1dc9e66 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -7,7 +7,8 @@ Here's what you can do to help:
 - [Open issues](https://github.com/Chalarangelo/30-seconds-of-code/issues/new) for things you want to see added or modified.
 - Be part of the discussion by helping out with [existing issues](https://github.com/Chalarangelo/30-seconds-of-code/issues) or talking on our [gitter channel](https://gitter.im/30-seconds-of-code/Lobby).
 - Submit [pull requests](https://github.com/Chalarangelo/30-seconds-of-code/pulls) with snippets you have created (see below for guidelines).
-- Fix typos in existing snippets or run `npm run lint "snippet-name.md"` on unlinted snippets (yes, this is something we actually want help with).
+- Fix typos in existing snippets or run `npm run linter "snippet-name.md"` on unlinted snippets (yes, this is something we actually want help with).
+- Tag untagged snippets by running `npm run tagger` and adding the appropriate tag next to the script name in `tag_database`.
 
 ### Snippet submission and Pull request guidelines
 
diff --git a/package.json b/package.json
index 2e12c8aac..4c6d5f82e 100644
--- a/package.json
+++ b/package.json
@@ -15,9 +15,9 @@
     "chalk": "^2.3.0"
   },
   "scripts": {
-    "build-list": "node ./scripts/builder.js",
-    "lint": "node ./scripts/lintSnippet.js",
-    "tag": "node ./scripts/tagger.js",
+    "builder": "node ./scripts/build-script.js",
+    "linter": "node ./scripts/lint-script.js",
+    "tagger": "node ./scripts/tag-script.js",
     "start": "concurrently --kill-others \"nodemon -e js,md -i README.md -x \\\"npm run build-list\\\"\" \"live-server ./build\""
   },
   "repository": {
diff --git a/scripts/build-script.js b/scripts/build-script.js
new file mode 100644
index 000000000..05514ae78
--- /dev/null
+++ b/scripts/build-script.js
@@ -0,0 +1,79 @@
+/*
+  This is the builder script that generates the README file.
+  Run using `npm run builder`.
+*/
+// Load modules
+const fs = require('fs-extra'), path = require('path'), chalk = require('chalk');
+// Set variables for paths
+const snippetsPath = './snippets',  staticPartsPath = './static-parts';
+// Set variables for script
+let snippets = {}, startPart = '', endPart = '', output = '', tagDbData = {};
+// Load helper functions (these are from existing snippets in 30 seconds of code!)
+const objectFromPairs = arr => arr.reduce((a, v) => (a[v[0]] = v[1], a), {});
+const capitalize = (str, lowerRest = false) => str.slice(0, 1).toUpperCase() + (lowerRest ? str.slice(1).toLowerCase() : str.slice(1));
+// Start the timer of the script
+console.time('Builder');
+// Synchronously read all snippets and sort them as necessary (case-insensitive)
+try {
+  let snippetFilenames = fs.readdirSync(snippetsPath);
+  snippetFilenames.sort((a, b) => {
+    a = a.toLowerCase();
+    b = b.toLowerCase();
+    if (a < b) return -1;
+    if (a > b) return 1;
+    return 0;
+  });
+  // Store the data read from each snippet in the appropriate object
+  for(let snippet of snippetFilenames)  snippets[snippet] = fs.readFileSync(path.join(snippetsPath,snippet),'utf8');
+}
+catch (err){  // Handle errors (hopefully not!)
+  console.log(`${chalk.red('ERROR!')} During snippet loading: ${err}`);
+  process.exit(1);
+}
+// Load static parts for the README file
+try {
+  startPart = fs.readFileSync(path.join(staticPartsPath,'README-start.md'),'utf8');
+  endPart = fs.readFileSync(path.join(staticPartsPath,'README-end.md'),'utf8');
+}
+catch (err){ // Handle errors (hopefully not!)
+  console.log(`${chalk.red('ERROR!')} During static part loading: ${err}`);
+  process.exit(1);
+}
+// Load tag data from the database
+try {
+  tagDbData = objectFromPairs(fs.readFileSync('tag_database','utf8').split('\n').slice(0,-1).map(v => v.split(':').slice(0,2)));
+}
+catch (err){  // Handle errors (hopefully not!)
+  console.log(`${chalk.red('ERROR!')} During tag database loading: ${err}`);
+  process.exit(1);
+}
+// Create the output for the README file
+try {
+  // Add the start static part
+  output += `${startPart+'\n'}`;
+  // Loop over tags and snippets to create the table of contents
+  for(let tag of [...new Set(Object.entries(tagDbData).map(t => t[1]))].filter(v => v).sort((a,b) => a.localeCompare(b))){
+    output +=`### ${capitalize(tag, true)}\n`;
+    for(let taggedSnippet of Object.entries(tagDbData).filter(v => v[1] === tag))
+      output += `* [${taggedSnippet[0][0].toUpperCase() + taggedSnippet[0].replace(/-/g,' ').slice(1)}](#${taggedSnippet[0].replace(/\(/g,'').replace(/\)/g,'').toLowerCase()})\n`
+    output += '\n';
+  }
+  // Loop over tags and snippets to create the list of snippets
+  for(let tag of [...new Set(Object.entries(tagDbData).map(t => t[1]))].filter(v => v).sort((a,b) => a.localeCompare(b))){
+    output +=`## ${capitalize(tag, true)}\n`;
+    for(let taggedSnippet of Object.entries(tagDbData).filter(v => v[1] === tag))
+      output += `\n${snippets[taggedSnippet[0]+'.md']+'\n[⬆ back to top](#table-of-contents)\n'}`;
+  }
+  // Add the ending static part
+  output += `\n${endPart+'\n'}`;
+  // Write to the README file
+  fs.writeFileSync('README.md', output);
+}
+catch (err){  // Handle errors (hopefully not!)
+  console.log(`${chalk.red('ERROR!')} During README generation: ${err}`);
+  process.exit(1);
+}
+// Log a success message
+console.log(`${chalk.green('SUCCESS!')} README file generated!`);
+// Log the time taken
+console.timeEnd('Builder');
diff --git a/scripts/builder.js b/scripts/builder.js
deleted file mode 100644
index ba345e67f..000000000
--- a/scripts/builder.js
+++ /dev/null
@@ -1,74 +0,0 @@
-var fs = require('fs-extra');
-var path = require('path');
-
-var snippetsPath = './snippets';
-var staticPartsPath = './static-parts';
-
-var snippets = {}, startPart = '', endPart = '', output = '', tagDbData = {};
-
-const objectFromPairs = arr => arr.reduce((a, v) => (a[v[0]] = v[1], a), {});
-const capitalize = (str, lowerRest = false) => str.slice(0, 1).toUpperCase() + (lowerRest ? str.slice(1).toLowerCase() : str.slice(1));
-
-console.time('Builder');
-
-try {
-  var snippetFilenames = fs.readdirSync(snippetsPath);
-  snippetFilenames.sort((a, b) => {
-    a = a.toLowerCase();
-    b = b.toLowerCase();
-    if (a < b) {
-      return -1;
-    }
-    if (a > b) {
-      return 1;
-    }
-    return 0;
-  });
-  for(var snippet of snippetFilenames){
-    snippets[snippet] = fs.readFileSync(path.join(snippetsPath,snippet),'utf8');
-  }
-}
-catch (err){
-  console.log('Error during snippet loading: '+err);
-  process.exit(1);
-}
-
-try {
-  startPart = fs.readFileSync(path.join(staticPartsPath,'README-start.md'),'utf8');
-  endPart = fs.readFileSync(path.join(staticPartsPath,'README-end.md'),'utf8');
-}
-catch (err){
-  console.log('Error during static part loading: '+err);
-  process.exit(1);
-}
-
-try {
-  tagDbData = objectFromPairs(fs.readFileSync('tag_database','utf8').split('\n').slice(0,-1).map(v => v.split(':').slice(0,2)));
-}
-catch (err){
-  console.log('Error during tag database loading: '+err);
-  process.exit(1);
-}
-
-try {
-  output += `${startPart+'\n'}`;
-  for(var tag of [...new Set(Object.entries(tagDbData).map(t => t[1]))].filter(v => v).sort((a,b) => a.localeCompare(b))){
-    output +=`### ${capitalize(tag, true)}\n`;
-    for(var taggedSnippet of Object.entries(tagDbData).filter(v => v[1] === tag))
-      output += `* [${taggedSnippet[0][0].toUpperCase() + taggedSnippet[0].replace(/-/g,' ').slice(1)}](#${taggedSnippet[0].replace(/\(/g,'').replace(/\)/g,'').toLowerCase()})\n`
-    output += '\n';
-  }
-  for(var tag of [...new Set(Object.entries(tagDbData).map(t => t[1]))].filter(v => v).sort((a,b) => a.localeCompare(b))){
-    output +=`## ${capitalize(tag, true)}\n`;
-    for(var taggedSnippet of Object.entries(tagDbData).filter(v => v[1] === tag))
-      output += `\n${snippets[taggedSnippet[0]+'.md']+'\n[⬆ back to top](#table-of-contents)\n'}`;
-  }
-  output += `\n${endPart+'\n'}`;
-  fs.writeFileSync('README.md', output);
-}
-catch (err){
-  console.log('Error during README generation: '+err);
-  process.exit(1);
-}
-
-console.timeEnd('Builder');
diff --git a/scripts/lintSnippet.js b/scripts/lint-script.js
similarity index 100%
rename from scripts/lintSnippet.js
rename to scripts/lint-script.js
diff --git a/scripts/tag-script.js b/scripts/tag-script.js
new file mode 100644
index 000000000..8537b3009
--- /dev/null
+++ b/scripts/tag-script.js
@@ -0,0 +1,67 @@
+/*
+  This is the tagger script that updates the tag_databse file and logs stats for snippet tags.
+  Run using `npm run tagger`.
+*/
+// Load modules
+const fs = require('fs-extra'), path = require('path'), chalk = require('chalk');
+// Set variables for paths
+const snippetsPath = './snippets';
+// Set variables for script
+let snippets = {}, output = '', tagDbData = {}, missingTags = 0, tagDbStats = {};
+// Load helper functions (these are from existing snippets in 30 seconds of code!)
+const objectFromPairs = arr => arr.reduce((a, v) => (a[v[0]] = v[1], a), {});
+const countOccurrences = (arr, value) => arr.reduce((a, v) => v === value ? a + 1 : a + 0, 0);
+// Start the timer of the script
+console.time('Tagger');
+// Synchronously read all snippets and sort them as necessary (case-insensitive)
+try {
+  let snippetFilenames = fs.readdirSync(snippetsPath);
+  snippetFilenames.sort((a, b) => {
+    a = a.toLowerCase();
+    b = b.toLowerCase();
+    if (a < b) return -1;
+    if (a > b) return 1;
+    return 0;
+  });
+  // Store the data read from each snippet in the appropriate object
+  for(let snippet of snippetFilenames)  snippets[snippet] = fs.readFileSync(path.join(snippetsPath,snippet),'utf8');
+}
+catch (err){ // Handle errors (hopefully not!)
+  console.log(`${chalk.red('ERROR!')} During snippet loading: ${err}`);
+  process.exit(1);
+}
+// Load tag data from the database
+try {
+  tagDbData = objectFromPairs(fs.readFileSync('tag_database','utf8').split('\n').slice(0,-1).map(v => v.split(':').slice(0,2)));
+  tagDbStats = Object.entries(tagDbData).sort((a,b) => a[1].localeCompare(b[1])).reduce((acc, val) => {acc.hasOwnProperty(val[1]) ? acc[val[1]]++ : acc[val[1]] = 1; return acc;}, {});
+}
+catch (err){ // Handle errors (hopefully not!)
+  console.log(`${chalk.red('ERROR!')} During tag database loading: ${err}`);
+  process.exit(1);
+}
+// Update the listing of snippets in tag_database and log the statistics, along with missing scripts
+try {
+  for(let snippet of Object.entries(snippets))
+    if(tagDbData.hasOwnProperty(snippet[0].slice(0,-3)) && tagDbData[snippet[0].slice(0,-3)].trim())
+      output += `${snippet[0].slice(0,-3)}:${tagDbData[snippet[0].slice(0,-3)].trim()}\n`;
+    else {
+      output += `${snippet[0].slice(0,-3)}:\n`;
+      missingTags++;
+      console.log(`${chalk.yellow('Tag missing:')} ${snippet[0].slice(0,-3)}`);
+    }
+  // Write to tag_database
+  fs.writeFileSync('tag_database', output);
+}
+catch (err){  // Handle errors (hopefully not!)
+  console.log(`${chalk.red('ERROR!')} During tag_database generation: ${err}`);
+  process.exit(1);
+}
+// Log statistics for the tag_database file
+console.log(`\n${chalk.bgWhite(chalk.black('=== TAG STATS ==='))}`)
+for(let tagData of Object.entries(tagDbStats).filter(v => v[0] !== 'undefined'))
+  console.log(`${chalk.green(tagData[0])}: ${tagData[1]} snippets`);
+console.log(`${chalk.blue('Untagged snippets:')} ${missingTags}\n`);
+// Log a success message
+console.log(`${chalk.green('SUCCESS!')} tag_database file updated!`);
+// Log the time taken
+console.timeEnd('Tagger');
diff --git a/scripts/tagger.js b/scripts/tagger.js
deleted file mode 100644
index ecebce50f..000000000
--- a/scripts/tagger.js
+++ /dev/null
@@ -1,67 +0,0 @@
-var fs = require('fs-extra');
-var path = require('path');
-var chalk = require('chalk');
-
-var snippetsPath = './snippets';
-
-var snippets = {}, output = '', tagDbData = {}, missingTags = 0, tagDbStats = {};
-
-const objectFromPairs = arr => arr.reduce((a, v) => (a[v[0]] = v[1], a), {});
-const countOccurrences = (arr, value) => arr.reduce((a, v) => v === value ? a + 1 : a + 0, 0);
-
-
-console.time('Tagger');
-
-try {
-  var snippetFilenames = fs.readdirSync(snippetsPath);
-  snippetFilenames.sort((a, b) => {
-    a = a.toLowerCase();
-    b = b.toLowerCase();
-    if (a < b) {
-      return -1;
-    }
-    if (a > b) {
-      return 1;
-    }
-    return 0;
-  });
-  for(var snippet of snippetFilenames){
-    snippets[snippet] = fs.readFileSync(path.join(snippetsPath,snippet),'utf8');
-  }
-}
-catch (err){
-  console.log('Error during snippet loading: '+err);
-  process.exit(1);
-}
-
-try {
-  tagDbData = objectFromPairs(fs.readFileSync('tag_database','utf8').split('\n').slice(0,-1).map(v => v.split(':').slice(0,2)));
-  tagDbStats = Object.entries(tagDbData).sort((a,b) => a[1].localeCompare(b[1])).reduce((acc, val) => {acc.hasOwnProperty(val[1]) ? acc[val[1]]++ : acc[val[1]] = 1; return acc;}, {});
-}
-catch (err){
-  console.log('Error during tag database loading: '+err);
-  process.exit(1);
-}
-
-try {
-  for(var snippet of Object.entries(snippets))
-    if(tagDbData.hasOwnProperty(snippet[0].slice(0,-3)) && tagDbData[snippet[0].slice(0,-3)].trim())
-      output += `${snippet[0].slice(0,-3)}:${tagDbData[snippet[0].slice(0,-3)].trim()}\n`;
-    else {
-      output += `${snippet[0].slice(0,-3)}:\n`;
-      missingTags++;
-      console.log(`${chalk.red('Tag missing:')} ${snippet[0].slice(0,-3)}`);
-    }
-  fs.writeFileSync('tag_database', output);
-}
-catch (err){
-  console.log('Error during README generation: '+err);
-  process.exit(1);
-}
-console.log(`\n=== TAG STATS ===`)
-for(var tagData of Object.entries(tagDbStats).filter(v => v[0] !== 'undefined')){
-  console.log(`${chalk.green(tagData[0])}: ${tagData[1]} snippets`);
-}
-console.log(`${chalk.blue('Untagged snippets:')} ${missingTags}\n`);
-
-console.timeEnd('Tagger');

From e0693339b40a4252b2ca972621202c6ed4f5dab0 Mon Sep 17 00:00:00 2001
From: Angelos Chalaris <chalarangelo@gmail.com>
Date: Thu, 14 Dec 2017 19:38:11 +0200
Subject: [PATCH 20/23] Updated tools, proper linting, build README

---
 CONTRIBUTING.md                            |  2 +-
 README.md                                  | 34 +++++------
 scripts/lint-script.js                     | 65 +++++++++++++---------
 snippets/array-difference.md               |  2 +-
 snippets/array-intersection.md             |  2 +-
 snippets/array-union.md                    |  2 +-
 snippets/collatz-algorithm.md              |  2 +-
 snippets/drop-elements-in-array.md         |  6 +-
 snippets/element-is-visible-in-viewport.md |  2 +-
 snippets/fill-array.md                     |  4 +-
 snippets/flatten-array-up-to-depth.md      |  4 +-
 snippets/ordinal-suffix-of-number.md       |  8 +--
 snippets/standard-deviation.md             |  2 +-
 13 files changed, 74 insertions(+), 61 deletions(-)

diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 4a1dc9e66..618a99b1a 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -7,8 +7,8 @@ Here's what you can do to help:
 - [Open issues](https://github.com/Chalarangelo/30-seconds-of-code/issues/new) for things you want to see added or modified.
 - Be part of the discussion by helping out with [existing issues](https://github.com/Chalarangelo/30-seconds-of-code/issues) or talking on our [gitter channel](https://gitter.im/30-seconds-of-code/Lobby).
 - Submit [pull requests](https://github.com/Chalarangelo/30-seconds-of-code/pulls) with snippets you have created (see below for guidelines).
-- Fix typos in existing snippets or run `npm run linter "snippet-name.md"` on unlinted snippets (yes, this is something we actually want help with).
 - Tag untagged snippets by running `npm run tagger` and adding the appropriate tag next to the script name in `tag_database`.
+- Fix typos in existing snippets or run `npm run linter` to lint unlinted snippets (yes, this is something we actually want help with, as this can take quite a while to run).
 
 ### Snippet submission and Pull request guidelines
 
diff --git a/README.md b/README.md
index 190b57a2e..ead95c6f1 100644
--- a/README.md
+++ b/README.md
@@ -122,7 +122,7 @@ const arrayConcat = (arr, ...args) => arr.concat(...args);
 Create a `Set` from `b`, then use `Array.filter()` on `a` to only keep values not contained in `b`.
 
 ```js
-const difference = (a, b) => { const s = new Set(b); return a.filter(x => !s.has(x)); }
+const difference = (a, b) => { const s = new Set(b); return a.filter(x => !s.has(x)); };
 // difference([1,2,3], [1,2]) -> [3]
 ```
 
@@ -133,7 +133,7 @@ const difference = (a, b) => { const s = new Set(b); return a.filter(x => !s.has
 Create a `Set` from `b`, then use `Array.filter()` on `a` to only keep values contained in `b`.
 
 ```js
-const intersection = (a, b) => { const s = new Set(b); return a.filter(x => s.has(x)); }
+const intersection = (a, b) => { const s = new Set(b); return a.filter(x => s.has(x)); };
 // intersection([1,2,3], [4,3,2]) -> [2,3]
 ```
 
@@ -144,7 +144,7 @@ const intersection = (a, b) => { const s = new Set(b); return a.filter(x => s.ha
 Create a `Set` with all values of `a` and `b` and convert to an array.
 
 ```js
-const union = (a, b) => Array.from(new Set([...a, ...b]))
+const union = (a, b) => Array.from(new Set([...a, ...b]));
 // union([1,2,3], [4,3,2]) -> [1,2,3,4]
 ```
 
@@ -216,10 +216,10 @@ Loop through the array, using `Array.shift()` to drop the first element of the a
 Returns the remaining elements.
 
 ```js
-const dropElements = (arr,func) => {
-  while(arr.length > 0 && !func(arr[0])) arr.shift();
+const dropElements = (arr, func) => {
+  while (arr.length > 0 && !func(arr[0])) arr.shift();
   return arr;
-}
+};
 // dropElements([1, 2, 3, 4], n => n >= 3) -> [3,4]
 ```
 
@@ -231,8 +231,8 @@ Use `Array.map()` to map values between `start` (inclusive) and `end` (exclusive
 Omit `start` to start at the first element and/or `end` to finish at the last.
 
 ```js
-const fillArray = (arr, value, start = 0, end = arr.length) => 
-  arr.map((v,i) => i>=start && i<end ? value : v);
+const fillArray = (arr, value, start = 0, end = arr.length) =>
+  arr.map((v, i) => i >= start && i < end ? value : v);
 // fillArray([1,2,3,4],'8',1,3) -> [1,'8','8',4]
 ```
 
@@ -258,8 +258,8 @@ Omit the second element, `depth` to flatten only to a depth of `1` (single flatt
 
 ```js
 const flattenDepth = (arr, depth = 1) =>
-  depth != 1 ? arr.reduce((a, v) => a.concat(Array.isArray(v) ? flattenDepth (v, depth-1) : v), []) 
-  : arr.reduce((a,v) => a.concat(v),[]);
+  depth != 1 ? arr.reduce((a, v) => a.concat(Array.isArray(v) ? flattenDepth(v, depth - 1) : v), [])
+  : arr.reduce((a, v) => a.concat(v), []);
 // flattenDepth([1,[2],[[[3],4],5]], 2) -> [1,2,[3],4,5]
 ```
 
@@ -506,7 +506,7 @@ const elementIsVisibleInViewport = (el, partiallyVisible = false) => {
     ? ((top > 0 && top < innerHeight) || (bottom > 0 && bottom < innerHeight)) &&
       ((left > 0 && left < innerWidth) || (right > 0 && right < innerWidth))
     : top >= 0 && left >= 0 && bottom <= innerHeight && right <= innerWidth;
-}
+};
 // e.g. 100x100 viewport and a 10x10px element at position {top: -1, left: 0, bottom: 9, right: 10}
 // elementIsVisibleInViewport(el) -> false (not fully visible)
 // elementIsVisibleInViewport(el, true) -> true (partially visible)
@@ -664,7 +664,7 @@ async function sleepyWork() {
 If `n` is even, return `n/2`. Otherwise  return `3n+1`.
 
 ```js
-const collatz = n => (n % 2 == 0) ? (n/2) : (3*n+1); 
+const collatz = n => (n % 2 == 0) ? (n / 2) : (3 * n + 1);
 // collatz(8) --> 4
 // collatz(5) --> 16
 ```
@@ -795,7 +795,7 @@ const standardDeviation = (arr, usePopulation = false) => {
     arr.reduce((acc, val) => acc.concat(Math.pow(val - mean, 2)), [])
        .reduce((acc, val) => acc + val, 0) / (arr.length - (usePopulation ? 0 : 1))
   );
- }
+};
 // standardDeviation([10,2,38,23,38,23,21]) -> 13.284434142114991 (sample)
 // standardDeviation([10,2,38,23,38,23,21], true) -> 12.29899614287479 (population)
 ```
@@ -1041,10 +1041,10 @@ If digit is found in teens pattern, use teens ordinal.
 ```js
 const toOrdinalSuffix = num => {
   const int = parseInt(num), digits = [(int % 10), (int % 100)],
-    ordinals = ["st", "nd", "rd", "th"], oPattern = [1,2,3,4],
-    tPattern = [11, 12, 13, 14, 15, 16, 17, 18, 19]
-  return oPattern.includes(digits[0]) && !tPattern.includes(digits[1]) ? int + ordinals[digits[0]-1] : int + ordinals[3];
-}
+    ordinals = ['st', 'nd', 'rd', 'th'], oPattern = [1, 2, 3, 4],
+    tPattern = [11, 12, 13, 14, 15, 16, 17, 18, 19];
+  return oPattern.includes(digits[0]) && !tPattern.includes(digits[1]) ? int + ordinals[digits[0] - 1] : int + ordinals[3];
+};
 // toOrdinalSuffix("123") -> "123rd"
 ```
 
diff --git a/scripts/lint-script.js b/scripts/lint-script.js
index a53686ee5..3aba12d27 100644
--- a/scripts/lint-script.js
+++ b/scripts/lint-script.js
@@ -1,31 +1,44 @@
-var fs = require('fs-extra');
-var cp = require('child_process');
-var path = require('path');
-
+/*
+  This is the linter script that lints snippets.
+  Run using `npm run linter`.
+*/
+// Load modules
+const fs = require('fs-extra'), cp = require('child_process'), path = require('path');
+// Set variables for paths
 var snippetsPath = './snippets';
-var snippetFilename = '';
-
-console.time('Linter');
-
-if(process.argv.length < 3){
-  console.log('Please specify the filename of a snippet to be linted.');
-  console.log('Example usage: npm run lint "snippet-file.md"');
-  process.exit(0);
-}
-else {
-  snippetFilename = process.argv[2];
-  let snippetData = fs.readFileSync(path.join(snippetsPath,snippetFilename),'utf8');
-  try {
+// Read files, lint each one individually and update
+try {
+  let snippetFilenames = fs.readdirSync(snippetsPath);
+  snippetFilenames.sort((a, b) => {
+    a = a.toLowerCase();
+    b = b.toLowerCase();
+    if (a < b) return -1;
+    if (a > b) return 1;
+    return 0;
+  });
+  // Read each file, get its code, write it to a temporary file, pass it through
+  // semistandard, get the output from the file, update the original file.
+  for(let snippet of snippetFilenames){
+    // Start a timer for the file
+    console.time(`Linter (${snippet})`);
+    // Synchronously read data from the snippet, get the code, write it to a temporary file
+    let snippetData = fs.readFileSync(path.join(snippetsPath,snippet),'utf8');
     let originalCode = snippetData.slice(snippetData.indexOf('```js')+5,snippetData.lastIndexOf('```'));
-    fs.writeFileSync('currentSnippet.js',`${originalCode}`);
-    cp.exec('semistandard "currentSnippet.js" --fix',{},(error, stdOut, stdErr) => {
-      let lintedCode = fs.readFileSync('currentSnippet.js','utf8');
-      fs.writeFile(path.join(snippetsPath,snippetFilename), `${snippetData.slice(0, snippetData.indexOf('```js')+5)+lintedCode+'```\n'}`);
-      console.timeEnd('Linter');
+    fs.writeFileSync(`${snippet}.temp.js`,`${originalCode}`);
+    // Run semistandard asynchronously (only way this manages to run), get linted code
+    // and write back to the original snippet file. Remove temporary file
+    cp.exec(`semistandard "${snippet}.temp.js" --fix`,{},(error, stdOut, stdErr) => {
+      let lintedCode = fs.readFileSync(`${snippet}.temp.js`,'utf8');
+      fs.writeFile(path.join(snippetsPath,snippet), `${snippetData.slice(0, snippetData.indexOf('```js')+5)+lintedCode+'```\n'}`);
+      fs.unlink(`${snippet}.temp.js`);
+      // Log a success message
+      console.log(`${chalk.red('SUCCESS!')} Linted snippet: ${snippet}`);
+      // Log the time taken for the file
+      console.timeEnd(`Linter (${snippet})`);
     });
   }
-  catch (err){
-    console.log('Error during snippet loading: '+err);
-    process.exit(1);
-  }
+}
+catch (err){  // Handle errors (hopefully not!)
+  console.log(`${chalk.red('ERROR!')} During linting: ${err}`);
+  process.exit(1);
 }
diff --git a/snippets/array-difference.md b/snippets/array-difference.md
index 46469b1d6..208cb811e 100644
--- a/snippets/array-difference.md
+++ b/snippets/array-difference.md
@@ -3,6 +3,6 @@
 Create a `Set` from `b`, then use `Array.filter()` on `a` to only keep values not contained in `b`.
 
 ```js
-const difference = (a, b) => { const s = new Set(b); return a.filter(x => !s.has(x)); }
+const difference = (a, b) => { const s = new Set(b); return a.filter(x => !s.has(x)); };
 // difference([1,2,3], [1,2]) -> [3]
 ```
diff --git a/snippets/array-intersection.md b/snippets/array-intersection.md
index 87c42378b..780ab1d85 100644
--- a/snippets/array-intersection.md
+++ b/snippets/array-intersection.md
@@ -3,6 +3,6 @@
 Create a `Set` from `b`, then use `Array.filter()` on `a` to only keep values contained in `b`.
 
 ```js
-const intersection = (a, b) => { const s = new Set(b); return a.filter(x => s.has(x)); }
+const intersection = (a, b) => { const s = new Set(b); return a.filter(x => s.has(x)); };
 // intersection([1,2,3], [4,3,2]) -> [2,3]
 ```
diff --git a/snippets/array-union.md b/snippets/array-union.md
index b417dcce7..6224227d1 100644
--- a/snippets/array-union.md
+++ b/snippets/array-union.md
@@ -3,6 +3,6 @@
 Create a `Set` with all values of `a` and `b` and convert to an array.
 
 ```js
-const union = (a, b) => Array.from(new Set([...a, ...b]))
+const union = (a, b) => Array.from(new Set([...a, ...b]));
 // union([1,2,3], [4,3,2]) -> [1,2,3,4]
 ```
diff --git a/snippets/collatz-algorithm.md b/snippets/collatz-algorithm.md
index 730bdd9e3..61614e5e0 100644
--- a/snippets/collatz-algorithm.md
+++ b/snippets/collatz-algorithm.md
@@ -3,7 +3,7 @@
 If `n` is even, return `n/2`. Otherwise  return `3n+1`.
 
 ```js
-const collatz = n => (n % 2 == 0) ? (n/2) : (3*n+1); 
+const collatz = n => (n % 2 == 0) ? (n / 2) : (3 * n + 1);
 // collatz(8) --> 4
 // collatz(5) --> 16
 ```
diff --git a/snippets/drop-elements-in-array.md b/snippets/drop-elements-in-array.md
index 0ad2ab5e9..236c5ab56 100644
--- a/snippets/drop-elements-in-array.md
+++ b/snippets/drop-elements-in-array.md
@@ -4,9 +4,9 @@ Loop through the array, using `Array.shift()` to drop the first element of the a
 Returns the remaining elements.
 
 ```js
-const dropElements = (arr,func) => {
-  while(arr.length > 0 && !func(arr[0])) arr.shift();
+const dropElements = (arr, func) => {
+  while (arr.length > 0 && !func(arr[0])) arr.shift();
   return arr;
-}
+};
 // dropElements([1, 2, 3, 4], n => n >= 3) -> [3,4]
 ```
diff --git a/snippets/element-is-visible-in-viewport.md b/snippets/element-is-visible-in-viewport.md
index 70ff83134..514aea5e6 100644
--- a/snippets/element-is-visible-in-viewport.md
+++ b/snippets/element-is-visible-in-viewport.md
@@ -12,7 +12,7 @@ const elementIsVisibleInViewport = (el, partiallyVisible = false) => {
     ? ((top > 0 && top < innerHeight) || (bottom > 0 && bottom < innerHeight)) &&
       ((left > 0 && left < innerWidth) || (right > 0 && right < innerWidth))
     : top >= 0 && left >= 0 && bottom <= innerHeight && right <= innerWidth;
-}
+};
 // e.g. 100x100 viewport and a 10x10px element at position {top: -1, left: 0, bottom: 9, right: 10}
 // elementIsVisibleInViewport(el) -> false (not fully visible)
 // elementIsVisibleInViewport(el, true) -> true (partially visible)
diff --git a/snippets/fill-array.md b/snippets/fill-array.md
index a08c4362e..a5da15483 100644
--- a/snippets/fill-array.md
+++ b/snippets/fill-array.md
@@ -4,7 +4,7 @@ Use `Array.map()` to map values between `start` (inclusive) and `end` (exclusive
 Omit `start` to start at the first element and/or `end` to finish at the last.
 
 ```js
-const fillArray = (arr, value, start = 0, end = arr.length) => 
-  arr.map((v,i) => i>=start && i<end ? value : v);
+const fillArray = (arr, value, start = 0, end = arr.length) =>
+  arr.map((v, i) => i >= start && i < end ? value : v);
 // fillArray([1,2,3,4],'8',1,3) -> [1,'8','8',4]
 ```
diff --git a/snippets/flatten-array-up-to-depth.md b/snippets/flatten-array-up-to-depth.md
index d28af98fb..b6e3805b6 100644
--- a/snippets/flatten-array-up-to-depth.md
+++ b/snippets/flatten-array-up-to-depth.md
@@ -7,7 +7,7 @@ Omit the second element, `depth` to flatten only to a depth of `1` (single flatt
 
 ```js
 const flattenDepth = (arr, depth = 1) =>
-  depth != 1 ? arr.reduce((a, v) => a.concat(Array.isArray(v) ? flattenDepth (v, depth-1) : v), []) 
-  : arr.reduce((a,v) => a.concat(v),[]);
+  depth != 1 ? arr.reduce((a, v) => a.concat(Array.isArray(v) ? flattenDepth(v, depth - 1) : v), [])
+  : arr.reduce((a, v) => a.concat(v), []);
 // flattenDepth([1,[2],[[[3],4],5]], 2) -> [1,2,[3],4,5]
 ```
diff --git a/snippets/ordinal-suffix-of-number.md b/snippets/ordinal-suffix-of-number.md
index 4e849eff7..d3166928b 100644
--- a/snippets/ordinal-suffix-of-number.md
+++ b/snippets/ordinal-suffix-of-number.md
@@ -7,9 +7,9 @@ If digit is found in teens pattern, use teens ordinal.
 ```js
 const toOrdinalSuffix = num => {
   const int = parseInt(num), digits = [(int % 10), (int % 100)],
-    ordinals = ["st", "nd", "rd", "th"], oPattern = [1,2,3,4],
-    tPattern = [11, 12, 13, 14, 15, 16, 17, 18, 19]
-  return oPattern.includes(digits[0]) && !tPattern.includes(digits[1]) ? int + ordinals[digits[0]-1] : int + ordinals[3];
-}
+    ordinals = ['st', 'nd', 'rd', 'th'], oPattern = [1, 2, 3, 4],
+    tPattern = [11, 12, 13, 14, 15, 16, 17, 18, 19];
+  return oPattern.includes(digits[0]) && !tPattern.includes(digits[1]) ? int + ordinals[digits[0] - 1] : int + ordinals[3];
+};
 // toOrdinalSuffix("123") -> "123rd"
 ```
diff --git a/snippets/standard-deviation.md b/snippets/standard-deviation.md
index e559972bb..5819579ad 100644
--- a/snippets/standard-deviation.md
+++ b/snippets/standard-deviation.md
@@ -11,7 +11,7 @@ const standardDeviation = (arr, usePopulation = false) => {
     arr.reduce((acc, val) => acc.concat(Math.pow(val - mean, 2)), [])
        .reduce((acc, val) => acc + val, 0) / (arr.length - (usePopulation ? 0 : 1))
   );
- }
+};
 // standardDeviation([10,2,38,23,38,23,21]) -> 13.284434142114991 (sample)
 // standardDeviation([10,2,38,23,38,23,21], true) -> 12.29899614287479 (population)
 ```

From 3549379bcb3a68a466092a8c390acdb3abe7e7a9 Mon Sep 17 00:00:00 2001
From: Angelos Chalaris <chalarangelo@gmail.com>
Date: Thu, 14 Dec 2017 20:13:16 +0200
Subject: [PATCH 21/23] Build README

---
 README.md | 11 ++++-------
 1 file changed, 4 insertions(+), 7 deletions(-)

diff --git a/README.md b/README.md
index ead95c6f1..5777cbc88 100644
--- a/README.md
+++ b/README.md
@@ -585,13 +585,10 @@ Otherwise return a curried function `f` that expects the rest of the arguments.
 If you want to curry a function that accepts a variable number of arguments (a variadic function, e.g. `Math.min()`), you can optionally pass the number of arguments to the second parameter `arity`.
 
 ```js
-const curry = (f, arity = f.length, next) =>
-  (next = prevArgs =>
-    nextArg => {
-      const args = [ ...prevArgs, nextArg ];
-      return args.length >= arity ? f(...args) : next(args);
-    }
-  )([]);
+const curry = (fn, arity = fn.length, ...args) =>
+  arity <= args.length
+    ? fn(...args)
+    : curry.bind(null, fn, arity, ...args)
 // curry(Math.pow)(2)(10) -> 1024
 // curry(Math.min, 3)(10)(50)(2) -> 2
 ```

From f81b49f9f5ad7fedce18d57538b7b51a5be01018 Mon Sep 17 00:00:00 2001
From: Angelos Chalaris <chalarangelo@gmail.com>
Date: Thu, 14 Dec 2017 20:20:37 +0200
Subject: [PATCH 22/23] Resolve #111

---
 snippets/is-array.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/snippets/is-array.md b/snippets/is-array.md
index 7652f74c9..939cb086d 100644
--- a/snippets/is-array.md
+++ b/snippets/is-array.md
@@ -3,7 +3,7 @@
 Use `Array.isArray()` to check if a value is classified as an array.
 
 ```js
-const isArray = val => val && Array.isArray(val);
+const isArray = val => !!val && Array.isArray(val);
 // isArray(null) -> false
 // isArray([1]) -> true
 ```

From 26c8055fa45f899478f773fef375d437a980b96e Mon Sep 17 00:00:00 2001
From: Angelos Chalaris <chalarangelo@gmail.com>
Date: Thu, 14 Dec 2017 20:21:26 +0200
Subject: [PATCH 23/23] Build README

---
 README.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 5777cbc88..b47ab9fce 100644
--- a/README.md
+++ b/README.md
@@ -946,7 +946,7 @@ const getType = v =>
 Use `Array.isArray()` to check if a value is classified as an array.
 
 ```js
-const isArray = val => val && Array.isArray(val);
+const isArray = val => !!val && Array.isArray(val);
 // isArray(null) -> false
 // isArray([1]) -> true
 ```