From e5949c90a53bc33ef8c94fac600571329eaab3c1 Mon Sep 17 00:00:00 2001
From: sabareesh <sabareeshk1991@gmail.com>
Date: Thu, 14 Dec 2017 16:51:34 +0530
Subject: [PATCH 01/24] lodash remove duplicated

---
 README.md          | 14 ++++++++++++++
 snippets/remove.md | 12 ++++++++++++
 2 files changed, 26 insertions(+)
 create mode 100644 snippets/remove.md

diff --git a/README.md b/README.md
index 77a5233e9..eacb3932a 100644
--- a/README.md
+++ b/README.md
@@ -59,6 +59,7 @@
 * [Random number in range](#random-number-in-range)
 * [Randomize order of array](#randomize-order-of-array)
 * [Redirect to url](#redirect-to-url)
+* [Remove](#remove)
 * [Reverse a string](#reverse-a-string)
 * [RGB to hexadecimal](#rgb-to-hexadecimal)
 * [Run promises in series](#run-promises-in-series)
@@ -610,6 +611,19 @@ const redirect = (url, asLink = true) =>
 // redirect('https://google.com')
 ```
 
+### Remove
+
+Remove elements from `arr` that are returns truthy. Use `Array.filter()` to finding the matching elements and `Array.reduce()` to remove elements using `Array.splice()`.The `func` is invoked with three arguments: (value, index, array).
+
+```js
+const remove = (arr, func) =>
+    arr.filter(func).reduce((acc, val) => {
+        arr.splice(arr.indexOf(val), 1)
+        return acc.concat(val);
+    }, [])
+//remove([1, 2, 3, 4], n => n % 2 == 0) -> [2, 4]
+```
+
 ### Reverse a string
 
 Use array destructuring and `Array.reverse()` to reverse the order of the characters in the string.
diff --git a/snippets/remove.md b/snippets/remove.md
new file mode 100644
index 000000000..6c8e71d55
--- /dev/null
+++ b/snippets/remove.md
@@ -0,0 +1,12 @@
+### Remove
+
+Remove elements from `arr` that are returns truthy. Use `Array.filter()` to finding the matching elements and `Array.reduce()` to remove elements using `Array.splice()`.The `func` is invoked with three arguments: (value, index, array).
+
+```js
+const remove = (arr, func) =>
+    arr.filter(func).reduce((acc, val) => {
+        arr.splice(arr.indexOf(val), 1)
+        return acc.concat(val);
+    }, [])
+//remove([1, 2, 3, 4], n => n % 2 == 0) -> [2, 4]
+```

From 123ca7943f5ee475ab96de9578eec90d13cf27c1 Mon Sep 17 00:00:00 2001
From: sabareesh <sabareeshk1991@gmail.com>
Date: Thu, 14 Dec 2017 16:56:32 +0530
Subject: [PATCH 02/24] lodash remove duplicated

---
 README.md | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/README.md b/README.md
index c8a19046c..12e86b020 100644
--- a/README.md
+++ b/README.md
@@ -57,13 +57,9 @@
 * [Promisify](#promisify)
 * [Random integer in range](#random-integer-in-range)
 * [Random number in range](#random-number-in-range)
-<<<<<<< HEAD
 * [Randomize order of array](#randomize-order-of-array)
 * [Redirect to url](#redirect-to-url)
 * [Remove](#remove)
-=======
-* [Redirect to URL](#redirect-to-url)
->>>>>>> 10ae7ad867aaa94d27da81180760d6a0fa84a3a8
 * [Reverse a string](#reverse-a-string)
 * [RGB to hexadecimal](#rgb-to-hexadecimal)
 * [Run promises in series](#run-promises-in-series)

From adbba8810a291e9c20656a4cb5cce4534f599e49 Mon Sep 17 00:00:00 2001
From: iamsoorena <s.soorena@gmail.com>
Date: Thu, 14 Dec 2017 18:00:15 +0330
Subject: [PATCH 03/24] add json to file function

---
 snippets/write-json-to-file.md | 9 +++++++++
 1 file changed, 9 insertions(+)
 create mode 100644 snippets/write-json-to-file.md

diff --git a/snippets/write-json-to-file.md b/snippets/write-json-to-file.md
new file mode 100644
index 000000000..6a0ae21a0
--- /dev/null
+++ b/snippets/write-json-to-file.md
@@ -0,0 +1,9 @@
+### Write a JSON to a file
+
+Write a `json` object to a `.json` file.
+```js
+const fs = require('fs')
+
+const jsonToFile = (obj, filename) => fs.writeFile(`${filename}.json`, JSON.stringify(obj, null, 4))
+// jsonToFile({test: "is passed"}, 'testJsonFile')
+```

From 99b900853cf82910be517647ecbafc2bc11b8d8b Mon Sep 17 00:00:00 2001
From: iamsoorena <s.soorena@gmail.com>
Date: Thu, 14 Dec 2017 18:34:05 +0330
Subject: [PATCH 04/24] add a functions that deeply cleans json objects from
 unwanted keys

---
 snippets/json-cleaner.md | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)
 create mode 100644 snippets/json-cleaner.md

diff --git a/snippets/json-cleaner.md b/snippets/json-cleaner.md
new file mode 100644
index 000000000..46ef745dc
--- /dev/null
+++ b/snippets/json-cleaner.md
@@ -0,0 +1,20 @@
+### Clean Json objects
+
+Clean your json object from unwanted keys, deeply.
+provide set of `keys` to keep and an indicator for `children` if there is any.
+
+```js
+const cleanObj = (obj, keys = [], childIndicator) => {
+  Object.keys(obj).forEach(key => {
+    if (key === childIndicator) {
+      cleanObj(obj[key], keys, childIndicator)
+    } else if (!keys.includes(key)) {
+      delete obj[key]
+    }
+  })
+}
+/*
+  dirtyObj = { a: 1, b: 2, children: {a: 1, b :2}}
+  let cleaned = cleanObj(dirtyObj, [a]) // { a: 1, children : { a: 1}} 
+ */
+```

From 30a0d91372e932d5197656d42df8e7ee317a45e1 Mon Sep 17 00:00:00 2001
From: David Wu <david10608@gmail.com>
Date: Fri, 15 Dec 2017 00:48:15 +0100
Subject: [PATCH 05/24] Create hexidecimal-to-RGB.md

---
 snippets/hexidecimal-to-RGB.md | 14 ++++++++++++++
 1 file changed, 14 insertions(+)
 create mode 100644 snippets/hexidecimal-to-RGB.md

diff --git a/snippets/hexidecimal-to-RGB.md b/snippets/hexidecimal-to-RGB.md
new file mode 100644
index 000000000..73ee1d18d
--- /dev/null
+++ b/snippets/hexidecimal-to-RGB.md
@@ -0,0 +1,14 @@
+### Hexadecimal to RGB
+
+Converts hexadecimal colorcodes to RGB colorcodes by matching the hexidecimal (two-digit) red, green and blue values and 
+mapping their decimal equivalents to an array [r, g, b]. Works also with shorthand hex triplets such as "#05F".
+
+```js
+const hexToRgb = hex =>
+  hex.replace(/^#?([a-f\d])([a-f\d])([a-f\d])$/i
+             ,(m, r, g, b) => '#' + r + r + g + g + b + b)
+    .substring(1).match(/.{2}/g)
+    .map(x => parseInt(x, 16))
+// hexToRgb('#27ae60') -> '[39, 174, 96]'
+// hexToRgb('#aaa') -> '[170, 170, 170]'
+```

From a64f389c78c639e23714f3cfaaf3fb856c2eafd0 Mon Sep 17 00:00:00 2001
From: David Wu <david10608@gmail.com>
Date: Fri, 15 Dec 2017 01:00:44 +0100
Subject: [PATCH 06/24] Rename hexidecimal-to-RGB.md to hexadecimal-to-RGB.md

---
 snippets/{hexidecimal-to-RGB.md => hexadecimal-to-RGB.md} | 0
 1 file changed, 0 insertions(+), 0 deletions(-)
 rename snippets/{hexidecimal-to-RGB.md => hexadecimal-to-RGB.md} (100%)

diff --git a/snippets/hexidecimal-to-RGB.md b/snippets/hexadecimal-to-RGB.md
similarity index 100%
rename from snippets/hexidecimal-to-RGB.md
rename to snippets/hexadecimal-to-RGB.md

From 4e7085b5ba5fcb7efdc25f2a2531cbb63bf2b117 Mon Sep 17 00:00:00 2001
From: sabareesh <sabareeshk1991@gmail.com>
Date: Fri, 15 Dec 2017 11:41:51 +0530
Subject: [PATCH 07/24] new arrray remove and concat issue fixed

---
 README.md                       | 13 ++++++++++++-
 snippets/array-concatenation.md |  2 +-
 snippets/remove.md              |  2 ++
 3 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/README.md b/README.md
index 12e86b020..35db7870c 100644
--- a/README.md
+++ b/README.md
@@ -10,6 +10,7 @@
 ## Contents
 
 * [Anagrams of string (with duplicates)](#anagrams-of-string-with-duplicates)
+* [Array concatenation](#array-concatenation)
 * [Array difference](#array-difference)
 * [Array intersection](#array-intersection)
 * [Array union](#array-union)
@@ -57,7 +58,6 @@
 * [Promisify](#promisify)
 * [Random integer in range](#random-integer-in-range)
 * [Random number in range](#random-number-in-range)
-* [Randomize order of array](#randomize-order-of-array)
 * [Redirect to url](#redirect-to-url)
 * [Remove](#remove)
 * [Reverse a string](#reverse-a-string)
@@ -97,6 +97,15 @@ const anagrams = str => {
 // anagrams('abc') -> ['abc','acb','bac','bca','cab','cba']
 ```
 
+### Array concatenation
+
+Use `Array.concat()` to concatenate and array with any additional arrays and/or values, specified in `args`.
+
+```js
+const ArrayConcat = (arr, ...args) => [].concat(arr, ...args); 
+// ArrayConcat([1], [1, 2, 3, [4]]) -> [1, 2, 3, [4]]
+```
+
 ### Array difference
 
 Create a `Set` from `b`, then use `Array.filter()` on `a` to only keep values not contained in `b`.
@@ -618,10 +627,12 @@ Remove elements from `arr` that are returns truthy. Use `Array.filter()` to find
 
 ```js
 const remove = (arr, func) =>
+    Array.isArray(arr) ?
     arr.filter(func).reduce((acc, val) => {
         arr.splice(arr.indexOf(val), 1)
         return acc.concat(val);
     }, [])
+    : [];
 //remove([1, 2, 3, 4], n => n % 2 == 0) -> [2, 4]
 ```
 
diff --git a/snippets/array-concatenation.md b/snippets/array-concatenation.md
index 39d978d6e..f441a0a17 100644
--- a/snippets/array-concatenation.md
+++ b/snippets/array-concatenation.md
@@ -3,6 +3,6 @@
 Use `Array.concat()` to concatenate and array with any additional arrays and/or values, specified in `args`.
 
 ```js
-const ArrayConcat = (arr, ...args) => arr.concat(...args); 
+const ArrayConcat = (arr, ...args) => [].concat(arr, ...args); 
 // ArrayConcat([1], [1, 2, 3, [4]]) -> [1, 2, 3, [4]]
 ```
diff --git a/snippets/remove.md b/snippets/remove.md
index 6c8e71d55..0a25e6f00 100644
--- a/snippets/remove.md
+++ b/snippets/remove.md
@@ -4,9 +4,11 @@ Remove elements from `arr` that are returns truthy. Use `Array.filter()` to find
 
 ```js
 const remove = (arr, func) =>
+    Array.isArray(arr) ?
     arr.filter(func).reduce((acc, val) => {
         arr.splice(arr.indexOf(val), 1)
         return acc.concat(val);
     }, [])
+    : [];
 //remove([1, 2, 3, 4], n => n % 2 == 0) -> [2, 4]
 ```

From bec3c5afa6d15160675d42145c904eb78132831c Mon Sep 17 00:00:00 2001
From: iamsoorena <s.soorena@gmail.com>
Date: Fri, 15 Dec 2017 12:56:13 +0330
Subject: [PATCH 08/24] removing unrelated file from "to merge" branch

---
 snippets/json-cleaner.md | 20 --------------------
 1 file changed, 20 deletions(-)
 delete mode 100644 snippets/json-cleaner.md

diff --git a/snippets/json-cleaner.md b/snippets/json-cleaner.md
deleted file mode 100644
index 46ef745dc..000000000
--- a/snippets/json-cleaner.md
+++ /dev/null
@@ -1,20 +0,0 @@
-### Clean Json objects
-
-Clean your json object from unwanted keys, deeply.
-provide set of `keys` to keep and an indicator for `children` if there is any.
-
-```js
-const cleanObj = (obj, keys = [], childIndicator) => {
-  Object.keys(obj).forEach(key => {
-    if (key === childIndicator) {
-      cleanObj(obj[key], keys, childIndicator)
-    } else if (!keys.includes(key)) {
-      delete obj[key]
-    }
-  })
-}
-/*
-  dirtyObj = { a: 1, b: 2, children: {a: 1, b :2}}
-  let cleaned = cleanObj(dirtyObj, [a]) // { a: 1, children : { a: 1}} 
- */
-```

From 453026fe3b2ccaf246b4bf04f2e58b1db68ba9ca Mon Sep 17 00:00:00 2001
From: Angelos Chalaris <chalarangelo@gmail.com>
Date: Fri, 15 Dec 2017 12:53:09 +0200
Subject: [PATCH 09/24] Tag, lint, build

---
 README.md                                 | 79 +++++++++++++++++++++--
 snippets/array-sample.md                  |  8 +--
 snippets/{without.md => array-without.md} |  9 +--
 snippets/array-zip.md                     |  7 +-
 snippets/deep-flatten-array.md            |  3 +-
 snippets/pipe.md                          |  9 ++-
 snippets/{takeRight.md => take-right.md}  |  5 +-
 tag_database                              |  6 +-
 8 files changed, 94 insertions(+), 32 deletions(-)
 rename snippets/{without.md => array-without.md} (88%)
 rename snippets/{takeRight.md => take-right.md} (83%)

diff --git a/README.md b/README.md
index 7160b9afb..b8412a802 100644
--- a/README.md
+++ b/README.md
@@ -13,7 +13,10 @@
 * [Array concatenation](#array-concatenation)
 * [Array difference](#array-difference)
 * [Array intersection](#array-intersection)
+* [Array sample](#array-sample)
 * [Array union](#array-union)
+* [Array without](#array-without)
+* [Array zip](#array-zip)
 * [Average of array of numbers](#average-of-array-of-numbers)
 * [Chunk array](#chunk-array)
 * [Compact](#compact)
@@ -39,6 +42,7 @@
 * [Similarity between arrays](#similarity-between-arrays)
 * [Sum of array of numbers](#sum-of-array-of-numbers)
 * [Tail of list](#tail-of-list)
+* [Take right](#take-right)
 * [Take](#take)
 * [Unique values of array](#unique-values-of-array)
 
@@ -149,6 +153,18 @@ const intersection = (a, b) => { const s = new Set(b); return a.filter(x => s.ha
 
 [⬆ back to top](#table-of-contents)
 
+### Array sample
+
+Use `Math.random()` to generate a random number, multiply it with `length` and round it of to the nearest whole number using `Math.floor()`.
+This method also works with strings.
+
+```js
+const sample = arr => arr[Math.floor(Math.random() * arr.length)];
+// sample([3, 7, 9, 11]) -> 9
+```
+
+[⬆ back to top](#table-of-contents)
+
 ### Array union
 
 Create a `Set` with all values of `a` and `b` and convert to an array.
@@ -160,6 +176,37 @@ const union = (a, b) => Array.from(new Set([...a, ...b]));
 
 [⬆ back to top](#table-of-contents)
 
+### Array without
+
+Use `Array.filter()` to create an array excluding all given values.
+
+```js
+const without = (arr, ...args) => arr.filter(v => args.indexOf(v) === -1);
+// without[2, 1, 2, 3], 1, 2) -> [3]
+// without([2, 1, 2, 3, 4, 5, 5, 5, 3, 2, 7, 7], 3, 1, 5, 2) -> [ 4, 7, 7 ]
+```
+
+[⬆ back to top](#table-of-contents)
+
+### Array zip
+
+Use `Math.max.apply()` to get the longest array in the arguments.
+Creates an array with that length as return value and use `Array.from()` with a map-function to create an array of grouped elements.
+If lengths of the argument-arrays vary, `undefined` is used where no value could be found.
+
+```js
+const zip = (...arrays) => {
+  const maxLength = Math.max.apply(null, arrays.map(a => a.length));
+  return Array.from({length: maxLength}).map((_, i) => {
+   return Array.from({length: arrays.length}, (_, k) => arrays[k][i]);
+  })
+}
+//zip(['a', 'b'], [1, 2], [true, false]); -> [['a', 1, true], ['b', 2, false]]
+//zip(['a'], [1, 2], [true, false]); -> [['a', 1, true], [undefined, 2, false]]
+```
+
+[⬆ 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.
@@ -180,7 +227,7 @@ If the original array can't be split evenly, the final chunk will contain the re
 ```js
 const chunk = (arr, size) =>
   Array.from({length: Math.ceil(arr.length / size)}, (v, i) => arr.slice(i * size, i * size + size));
-// chunk([1,2,3,4,5], 2) -> [[1,2],[3,4],5]
+// chunk([1,2,3,4,5], 2) -> [[1,2],[3,4],[5]]
 ```
 
 [⬆ back to top](#table-of-contents)
@@ -210,11 +257,11 @@ const countOccurrences = (arr, value) => arr.reduce((a, v) => v === value ? a +
 ### Deep flatten array
 
 Use recursion.
-Use `Array.reduce()` to get all elements that are not arrays, flatten each element that is an array.
+Use `Array.concat()` with an empty array (`[]`) and the spread operator (`...`) to flatten an array.
+Rrecursively flatten each element that is an array.
 
 ```js
-const deepFlatten = arr =>
-  arr.reduce((a, v) => a.concat(Array.isArray(v) ? deepFlatten(v) : v), []);
+const deepFlatten = arr => [].concat(...arr.map(v => Array.isArray(v) ? deepFlatten(v) : v));
 // deepFlatten([1,[2],[[3],4],5]) -> [1,2,3,4,5]
 ```
 
@@ -469,6 +516,18 @@ const tail = arr => arr.length > 1 ? arr.slice(1) : arr;
 
 [⬆ back to top](#table-of-contents)
 
+### Take right
+
+Use `Array.slice()` to create a slice of the array with `n` elements taken from the end.
+
+```js
+const takeRight = (arr, n = 1) => arr.slice(arr.length - n, arr.length);
+// takeRight([1, 2, 3], 2) -> [ 2, 3 ]
+// takeRight([1, 2, 3]) -> [3]
+```
+
+[⬆ back to top](#table-of-contents)
+
 ### Take
 
 Use `Array.slice()` to create a slice of the array with `n` elements taken from the beginning.
@@ -633,11 +692,17 @@ const curry = (fn, arity = fn.length, ...args) =>
 
 ### Pipe
 
-Use `Array.reduce()` to pass value through functions.
+Use `Array.reduce()` to perform left-to-right function composition.
+The first (leftmost) function can accept one or more arguments; the remaining functions must be unary.
 
 ```js
-const pipe = (...funcs) => arg => funcs.reduce((acc, func) => func(acc), arg);
-// pipe(btoa, x => x.toUpperCase())("Test") -> "VGVZDA=="
+const pipe = (...fns) => fns.reduce((f, g) => (...args) => g(f(...args)));
+/*
+const add5 = x => x + 5
+const multiply = (x, y) => x * y
+const multiplyAndAdd5 = pipe(multiply, add5)
+multiplyAndAdd5(5, 2) -> 15
+*/
 ```
 
 [⬆ back to top](#table-of-contents)
diff --git a/snippets/array-sample.md b/snippets/array-sample.md
index d48f13840..9de5c5ae0 100644
--- a/snippets/array-sample.md
+++ b/snippets/array-sample.md
@@ -1,9 +1,9 @@
 ### Array sample
 
-Use `Math.random()` to generate a random number, multiply it with `Array.length` and round it of to the nearest whole number using `Math.floor()`. Works with strings too. 
+Use `Math.random()` to generate a random number, multiply it with `length` and round it of to the nearest whole number using `Math.floor()`.
+This method also works with strings.
 
 ```js
 const sample = arr => arr[Math.floor(Math.random() * arr.length)];
-
-// sample([3, 7, 9, 11]) -> 9 
-```
\ No newline at end of file
+// sample([3, 7, 9, 11]) -> 9
+```
diff --git a/snippets/without.md b/snippets/array-without.md
similarity index 88%
rename from snippets/without.md
rename to snippets/array-without.md
index 00876b5c9..dd657fe2a 100644
--- a/snippets/without.md
+++ b/snippets/array-without.md
@@ -1,12 +1,9 @@
-### Without
+### Array without
 
-Use `Array.filter()` to create an array excluding all given values
+Use `Array.filter()` to create an array excluding all given values.
 
 ```js
-
-const without = (arr, ...args) => arr.filter(v => args.indexOf(v) === -1)
-
+const without = (arr, ...args) => arr.filter(v => args.indexOf(v) === -1);
 // without[2, 1, 2, 3], 1, 2) -> [3]
 // without([2, 1, 2, 3, 4, 5, 5, 5, 3, 2, 7, 7], 3, 1, 5, 2) -> [ 4, 7, 7 ]
-
 ```
diff --git a/snippets/array-zip.md b/snippets/array-zip.md
index 08c40ed68..6c9a2491b 100644
--- a/snippets/array-zip.md
+++ b/snippets/array-zip.md
@@ -1,17 +1,16 @@
 ### Array zip
 
-Use `Math.max.apply` to get the longest array in the arguments.
-Creates an array with that length as return value and use `Array.from` with a map-function to create an array of grouped elements.
+Use `Math.max.apply()` to get the longest array in the arguments.
+Creates an array with that length as return value and use `Array.from()` with a map-function to create an array of grouped elements.
 If lengths of the argument-arrays vary, `undefined` is used where no value could be found.
 
 ```js
 const zip = (...arrays) => {
   const maxLength = Math.max.apply(null, arrays.map(a => a.length));
   return Array.from({length: maxLength}).map((_, i) => {
-   return Array.from({length: arrays.length}, (_, k) => arrays[k][i])
+   return Array.from({length: arrays.length}, (_, k) => arrays[k][i]);
   })
 }
-
 //zip(['a', 'b'], [1, 2], [true, false]); -> [['a', 1, true], ['b', 2, false]]
 //zip(['a'], [1, 2], [true, false]); -> [['a', 1, true], [undefined, 2, false]]
 ```
diff --git a/snippets/deep-flatten-array.md b/snippets/deep-flatten-array.md
index 1dffe860f..d33ff7e25 100644
--- a/snippets/deep-flatten-array.md
+++ b/snippets/deep-flatten-array.md
@@ -1,7 +1,8 @@
 ### Deep flatten array
 
 Use recursion.
-Use `[].concat()` and the spread operator `...` to flatten an array, and recursively flatten each element that is an array.
+Use `Array.concat()` with an empty array (`[]`) and the spread operator (`...`) to flatten an array.
+Rrecursively flatten each element that is an array.
 
 ```js
 const deepFlatten = arr => [].concat(...arr.map(v => Array.isArray(v) ? deepFlatten(v) : v));
diff --git a/snippets/pipe.md b/snippets/pipe.md
index f46a32148..e5136777b 100644
--- a/snippets/pipe.md
+++ b/snippets/pipe.md
@@ -1,15 +1,14 @@
 ### Pipe
 
-Use `Array.reduce()` to perform left-to-right function composition. The first (leftmost) function can accept one or more arguments; the remaining functions must be unary. 
+Use `Array.reduce()` to perform left-to-right function composition.
+The first (leftmost) function can accept one or more arguments; the remaining functions must be unary.
 
 ```js
-const pipe = (...fns) => fns.reduce((f, g) => (...args) => g(f(...args)))
+const pipe = (...fns) => fns.reduce((f, g) => (...args) => g(f(...args)));
 /*
 const add5 = x => x + 5
-const multiply = (x, y) => x * y 
-
+const multiply = (x, y) => x * y
 const multiplyAndAdd5 = pipe(multiply, add5)
-
 multiplyAndAdd5(5, 2) -> 15
 */
 ```
diff --git a/snippets/takeRight.md b/snippets/take-right.md
similarity index 83%
rename from snippets/takeRight.md
rename to snippets/take-right.md
index 03fc634fa..1e7c55766 100644
--- a/snippets/takeRight.md
+++ b/snippets/take-right.md
@@ -1,4 +1,4 @@
-### takeRight
+### Take right
 
 Use `Array.slice()` to create a slice of the array with `n` elements taken from the end.
 
@@ -6,5 +6,4 @@ Use `Array.slice()` to create a slice of the array with `n` elements taken from
 const takeRight = (arr, n = 1) => arr.slice(arr.length - n, arr.length);
 // takeRight([1, 2, 3], 2) -> [ 2, 3 ]
 // takeRight([1, 2, 3]) -> [3]
-// takeRight([1, 2, 3]) -> []
-```
\ No newline at end of file
+```
diff --git a/tag_database b/tag_database
index d1733c293..7e20b7516 100644
--- a/tag_database
+++ b/tag_database
@@ -2,7 +2,10 @@ anagrams-of-string-(with-duplicates):string
 array-concatenation:array
 array-difference:array
 array-intersection:array
+array-sample:array
 array-union:array
+array-without:array
+array-zip:array
 average-of-array-of-numbers:array
 bottom-visible:browser
 capitalize-first-letter-of-every-word:string
@@ -77,8 +80,8 @@ standard-deviation:math
 sum-of-array-of-numbers:array
 swap-values-of-two-variables:utility
 tail-of-list:array
+take-right:array
 take:array
-takeRight:array
 truncate-a-string:string
 unique-values-of-array:array
 URL-parameters:utility
@@ -86,4 +89,3 @@ UUID-generator:utility
 validate-email:utility
 validate-number:utility
 value-or-default:utility
-without:array

From 2b4d7c6ee52adb792881f757043ef5102cb1981c Mon Sep 17 00:00:00 2001
From: Arjun Mahishi <arjun.mahishi@gmail.com>
Date: Fri, 15 Dec 2017 16:30:12 +0530
Subject: [PATCH 10/24] Added snippet for array includes

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

diff --git a/snippets/array-includes.md b/snippets/array-includes.md
new file mode 100644
index 000000000..c068d17b2
--- /dev/null
+++ b/snippets/array-includes.md
@@ -0,0 +1,10 @@
+### Array includes
+
+Use `slice()` to offset the array/string. `Array.indexOf()` returns `-1` if the sub-string/array dosen't contain the given `value`.
+
+```js
+const includes = (collection, val, fromIndex=0) => collection.slice(fromIndex).indexOf(val) != -1;
+
+// includes("30-seconds-of-code", "code") -> true
+// includes([1, 2, 3, 4], [1, 2], 1) -> false
+```
\ No newline at end of file

From e8293d89de4a515af9d02432254e1a858db16290 Mon Sep 17 00:00:00 2001
From: Angelos Chalaris <chalarangelo@gmail.com>
Date: Fri, 15 Dec 2017 13:06:53 +0200
Subject: [PATCH 11/24] Tag, lint, build

---
 README.md                  | 14 ++++++++++++++
 snippets/array-includes.md |  6 +++---
 tag_database               |  1 +
 3 files changed, 18 insertions(+), 3 deletions(-)

diff --git a/README.md b/README.md
index b8412a802..416266397 100644
--- a/README.md
+++ b/README.md
@@ -12,6 +12,7 @@
 ### Array
 * [Array concatenation](#array-concatenation)
 * [Array difference](#array-difference)
+* [Array includes](#array-includes)
 * [Array intersection](#array-intersection)
 * [Array sample](#array-sample)
 * [Array union](#array-union)
@@ -142,6 +143,19 @@ const difference = (a, b) => { const s = new Set(b); return a.filter(x => !s.has
 
 [⬆ back to top](#table-of-contents)
 
+### Array includes
+
+Use `slice()` to offset the array/string and `indexOf()` to check if the value is included.
+Omit the last argument, `fromIndex`, to check the whole array/string.
+
+```js
+const includes = (collection, val, fromIndex=0) => collection.slice(fromIndex).indexOf(val) != -1;
+// includes("30-seconds-of-code", "code") -> true
+// includes([1, 2, 3, 4], [1, 2], 1) -> false
+```
+
+[⬆ 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`.
diff --git a/snippets/array-includes.md b/snippets/array-includes.md
index c068d17b2..5ebcbc009 100644
--- a/snippets/array-includes.md
+++ b/snippets/array-includes.md
@@ -1,10 +1,10 @@
 ### Array includes
 
-Use `slice()` to offset the array/string. `Array.indexOf()` returns `-1` if the sub-string/array dosen't contain the given `value`.
+Use `slice()` to offset the array/string and `indexOf()` to check if the value is included.
+Omit the last argument, `fromIndex`, to check the whole array/string.
 
 ```js
 const includes = (collection, val, fromIndex=0) => collection.slice(fromIndex).indexOf(val) != -1;
-
 // includes("30-seconds-of-code", "code") -> true
 // includes([1, 2, 3, 4], [1, 2], 1) -> false
-```
\ No newline at end of file
+```
diff --git a/tag_database b/tag_database
index 7e20b7516..67bdedd3c 100644
--- a/tag_database
+++ b/tag_database
@@ -1,6 +1,7 @@
 anagrams-of-string-(with-duplicates):string
 array-concatenation:array
 array-difference:array
+array-includes:array
 array-intersection:array
 array-sample:array
 array-union:array

From cb488b39742979d664e883f84246b7c4d2208c5d Mon Sep 17 00:00:00 2001
From: Angelos Chalaris <chalarangelo@gmail.com>
Date: Fri, 15 Dec 2017 13:15:21 +0200
Subject: [PATCH 12/24] Update write-json-to-file.md

---
 snippets/write-json-to-file.md | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/snippets/write-json-to-file.md b/snippets/write-json-to-file.md
index 6a0ae21a0..5cff72064 100644
--- a/snippets/write-json-to-file.md
+++ b/snippets/write-json-to-file.md
@@ -1,9 +1,9 @@
 ### Write a JSON to a file
 
-Write a `json` object to a `.json` file.
-```js
-const fs = require('fs')
+Use `fs.writeFile()`, template literals and `JSON.stringify()` to write a `json` object to a `.json` file.
 
-const jsonToFile = (obj, filename) => fs.writeFile(`${filename}.json`, JSON.stringify(obj, null, 4))
+```js
+const fs = require('fs');
+const jsonToFile = (obj, filename) => fs.writeFile(`${filename}.json`, JSON.stringify(obj, null, 2))
 // jsonToFile({test: "is passed"}, 'testJsonFile')
 ```

From 564486472469851e0ff92fb4045afbe795b7c991 Mon Sep 17 00:00:00 2001
From: Angelos Chalaris <chalarangelo@gmail.com>
Date: Fri, 15 Dec 2017 13:15:51 +0200
Subject: [PATCH 13/24] Update write-json-to-file.md

---
 snippets/write-json-to-file.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/snippets/write-json-to-file.md b/snippets/write-json-to-file.md
index 5cff72064..17de5a44e 100644
--- a/snippets/write-json-to-file.md
+++ b/snippets/write-json-to-file.md
@@ -5,5 +5,5 @@ Use `fs.writeFile()`, template literals and `JSON.stringify()` to write a `json`
 ```js
 const fs = require('fs');
 const jsonToFile = (obj, filename) => fs.writeFile(`${filename}.json`, JSON.stringify(obj, null, 2))
-// jsonToFile({test: "is passed"}, 'testJsonFile')
+// jsonToFile({test: "is passed"}, 'testJsonFile') -> writes the object to 'testJsonFile.json'
 ```

From 25984a700e36340d2a6912c6701f7b9cc297a3d6 Mon Sep 17 00:00:00 2001
From: Angelos Chalaris <chalarangelo@gmail.com>
Date: Fri, 15 Dec 2017 13:33:46 +0200
Subject: [PATCH 14/24] Update shallow clone, tag, build

---
 README.md                        | 20 ++++++++++++++++++--
 snippets/shallow-clone-object.md |  4 ++--
 tag_database                     |  1 +
 3 files changed, 21 insertions(+), 4 deletions(-)

diff --git a/README.md b/README.md
index 416266397..ace0e4e80 100644
--- a/README.md
+++ b/README.md
@@ -83,6 +83,9 @@
 ### Media
 * [Speech synthesis (experimental)](#speech-synthesis-experimental)
 
+### Node
+* [Write json to file](#write-json-to-file)
+
 ### Object
 * [Object from key value pairs](#object-from-key-value-pairs)
 * [Object to key value pairs](#object-to-key-value-pairs)
@@ -943,6 +946,19 @@ const speak = message => {
 // speak('Hello, World') -> plays the message
 ```
 
+[⬆ back to top](#table-of-contents)
+## Node
+
+### Write a JSON to a file
+
+Use `fs.writeFile()`, template literals and `JSON.stringify()` to write a `json` object to a `.json` file.
+
+```js
+const fs = require('fs');
+const jsonToFile = (obj, filename) => fs.writeFile(`${filename}.json`, JSON.stringify(obj, null, 2))
+// jsonToFile({test: "is passed"}, 'testJsonFile') -> writes the object to 'testJsonFile.json'
+```
+
 [⬆ back to top](#table-of-contents)
 ## Object
 
@@ -970,10 +986,10 @@ const objectToPairs = obj => Object.keys(obj).map(k => [k, obj[k]]);
 
 ### Shallow clone object
 
-Use the object `...spread` operator to spread the properties of the target object into the clone.
+Use `Object.assign()` and an empty object (`{}`) to create a shallo clone of the original.
 
 ```js
-const shallowClone = obj => ({ ...obj });
+const shallowClone = obj => Object.assign({}, obj);
 /*
 const a = { x: true, y: 1 };
 const b = shallowClone(a);
diff --git a/snippets/shallow-clone-object.md b/snippets/shallow-clone-object.md
index c6873c0d8..f3536999f 100644
--- a/snippets/shallow-clone-object.md
+++ b/snippets/shallow-clone-object.md
@@ -1,9 +1,9 @@
 ### Shallow clone object
 
-Use the object `...spread` operator to spread the properties of the target object into the clone.
+Use `Object.assign()` and an empty object (`{}`) to create a shallo clone of the original.
 
 ```js
-const shallowClone = obj => ({ ...obj });
+const shallowClone = obj => Object.assign({}, obj);
 /*
 const a = { x: true, y: 1 };
 const b = shallowClone(a);
diff --git a/tag_database b/tag_database
index 67bdedd3c..1a454936f 100644
--- a/tag_database
+++ b/tag_database
@@ -90,3 +90,4 @@ UUID-generator:utility
 validate-email:utility
 validate-number:utility
 value-or-default:utility
+write-json-to-file:node

From 5d11c699d56ca9615d927082a3a814fd30a7abc3 Mon Sep 17 00:00:00 2001
From: Angelos Chalaris <chalarangelo@gmail.com>
Date: Fri, 15 Dec 2017 13:42:31 +0200
Subject: [PATCH 15/24] Build

---
 README.md | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/README.md b/README.md
index ace0e4e80..4e1b89453 100644
--- a/README.md
+++ b/README.md
@@ -1031,12 +1031,13 @@ const capitalizeEveryWord = str => str.replace(/\b[a-z]/g, char => char.toUpperC
 
 ### Capitalize first letter
 
-Use `slice(0,1)` and `toUpperCase()` to capitalize first letter, `slice(1)` to get the rest of the string.
+Use destructuring and `toUpperCase()` to capitalize first letter, `...rest` to get array of characters after first letter and then `Array.join('')` to make it a string again.
 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));
+const capitalize = ([first,...rest], lowerRest = false) =>
+  first.toUpperCase() + (lowerRest ? rest.join('').toLowerCase() : rest.join(''));
+// capitalize('myName') -> 'MyName'
 // capitalize('myName', true) -> 'Myname'
 ```
 

From a95b89a958f73994929136d76039f39f5eba984e Mon Sep 17 00:00:00 2001
From: Angelos Chalaris <chalarangelo@gmail.com>
Date: Fri, 15 Dec 2017 13:50:09 +0200
Subject: [PATCH 16/24] Update remove.md

---
 snippets/remove.md | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/snippets/remove.md b/snippets/remove.md
index 0a25e6f00..f9cfbc8a1 100644
--- a/snippets/remove.md
+++ b/snippets/remove.md
@@ -1,14 +1,13 @@
 ### Remove
 
-Remove elements from `arr` that are returns truthy. Use `Array.filter()` to finding the matching elements and `Array.reduce()` to remove elements using `Array.splice()`.The `func` is invoked with three arguments: (value, index, array).
+Use `Array.filter()` to find array elements that return truthy values and `Array.reduce()` to remove elements using `Array.splice()`.
+The `func` is invoked with three arguments (`value, index, array`).
 
 ```js
 const remove = (arr, func) =>
-    Array.isArray(arr) ?
-    arr.filter(func).reduce((acc, val) => {
-        arr.splice(arr.indexOf(val), 1)
-        return acc.concat(val);
+  Array.isArray(arr) ? arr.filter(func).reduce((acc, val) => {
+    arr.splice(arr.indexOf(val), 1); return acc.concat(val);
     }, [])
-    : [];
+  : [];
 //remove([1, 2, 3, 4], n => n % 2 == 0) -> [2, 4]
 ```

From 1b682879083a47d08d2c9f78c17259c34f7c4186 Mon Sep 17 00:00:00 2001
From: Angelos Chalaris <chalarangelo@gmail.com>
Date: Fri, 15 Dec 2017 13:50:46 +0200
Subject: [PATCH 17/24] Update and rename remove.md to array-remove.md

---
 snippets/{remove.md => array-remove.md} | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
 rename snippets/{remove.md => array-remove.md} (96%)

diff --git a/snippets/remove.md b/snippets/array-remove.md
similarity index 96%
rename from snippets/remove.md
rename to snippets/array-remove.md
index f9cfbc8a1..e08a4a02f 100644
--- a/snippets/remove.md
+++ b/snippets/array-remove.md
@@ -1,4 +1,4 @@
-### Remove
+### Array remove
 
 Use `Array.filter()` to find array elements that return truthy values and `Array.reduce()` to remove elements using `Array.splice()`.
 The `func` is invoked with three arguments (`value, index, array`).

From 11b948d43ffd61b317fa965f6c4d5a20b1bc2cd0 Mon Sep 17 00:00:00 2001
From: Angelos Chalaris <chalarangelo@gmail.com>
Date: Fri, 15 Dec 2017 13:51:06 +0200
Subject: [PATCH 18/24] Update array-concatenation.md

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

diff --git a/snippets/array-concatenation.md b/snippets/array-concatenation.md
index f441a0a17..40bf43c29 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) => [].concat(arr, ...args); 

From aef74133e239b1f0f73fb430557765b81b66afb5 Mon Sep 17 00:00:00 2001
From: Angelos Chalaris <chalarangelo@gmail.com>
Date: Fri, 15 Dec 2017 13:53:12 +0200
Subject: [PATCH 19/24] Tag and build

---
 README.md    | 21 +++++++++++++++++++--
 tag_database |  1 +
 2 files changed, 20 insertions(+), 2 deletions(-)

diff --git a/README.md b/README.md
index 4e1b89453..e6ada6c41 100644
--- a/README.md
+++ b/README.md
@@ -14,6 +14,7 @@
 * [Array difference](#array-difference)
 * [Array includes](#array-includes)
 * [Array intersection](#array-intersection)
+* [Array remove](#array-remove)
 * [Array sample](#array-sample)
 * [Array union](#array-union)
 * [Array without](#array-without)
@@ -129,8 +130,8 @@
 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);
-// arrayConcat([1], 2, [3], [[4]]) -> [1,2,3,[4]]
+const ArrayConcat = (arr, ...args) => [].concat(arr, ...args); 
+// ArrayConcat([1], [1, 2, 3, [4]]) -> [1, 2, 3, [4]]
 ```
 
 [⬆ back to top](#table-of-contents)
@@ -170,6 +171,22 @@ const intersection = (a, b) => { const s = new Set(b); return a.filter(x => s.ha
 
 [⬆ back to top](#table-of-contents)
 
+### Array remove
+
+Use `Array.filter()` to find array elements that return truthy values and `Array.reduce()` to remove elements using `Array.splice()`.
+The `func` is invoked with three arguments (`value, index, array`).
+
+```js
+const remove = (arr, func) =>
+  Array.isArray(arr) ? arr.filter(func).reduce((acc, val) => {
+    arr.splice(arr.indexOf(val), 1); return acc.concat(val);
+    }, [])
+  : [];
+//remove([1, 2, 3, 4], n => n % 2 == 0) -> [2, 4]
+```
+
+[⬆ back to top](#table-of-contents)
+
 ### Array sample
 
 Use `Math.random()` to generate a random number, multiply it with `length` and round it of to the nearest whole number using `Math.floor()`.
diff --git a/tag_database b/tag_database
index 1a454936f..20b8fe94a 100644
--- a/tag_database
+++ b/tag_database
@@ -3,6 +3,7 @@ array-concatenation:array
 array-difference:array
 array-includes:array
 array-intersection:array
+array-remove:array
 array-sample:array
 array-union:array
 array-without:array

From 7f9a090537eb9a53e1ab8a90753415b642189530 Mon Sep 17 00:00:00 2001
From: David Wu <david10608@gmail.com>
Date: Fri, 15 Dec 2017 13:27:43 +0100
Subject: [PATCH 20/24] Update and rename hexadecimal-to-RGB.md to
 hexcode-to-RGB.md

---
 snippets/hexadecimal-to-RGB.md | 14 --------------
 snippets/hexcode-to-RGB.md     | 10 ++++++++++
 2 files changed, 10 insertions(+), 14 deletions(-)
 delete mode 100644 snippets/hexadecimal-to-RGB.md
 create mode 100644 snippets/hexcode-to-RGB.md

diff --git a/snippets/hexadecimal-to-RGB.md b/snippets/hexadecimal-to-RGB.md
deleted file mode 100644
index 73ee1d18d..000000000
--- a/snippets/hexadecimal-to-RGB.md
+++ /dev/null
@@ -1,14 +0,0 @@
-### Hexadecimal to RGB
-
-Converts hexadecimal colorcodes to RGB colorcodes by matching the hexidecimal (two-digit) red, green and blue values and 
-mapping their decimal equivalents to an array [r, g, b]. Works also with shorthand hex triplets such as "#05F".
-
-```js
-const hexToRgb = hex =>
-  hex.replace(/^#?([a-f\d])([a-f\d])([a-f\d])$/i
-             ,(m, r, g, b) => '#' + r + r + g + g + b + b)
-    .substring(1).match(/.{2}/g)
-    .map(x => parseInt(x, 16))
-// hexToRgb('#27ae60') -> '[39, 174, 96]'
-// hexToRgb('#aaa') -> '[170, 170, 170]'
-```
diff --git a/snippets/hexcode-to-RGB.md b/snippets/hexcode-to-RGB.md
new file mode 100644
index 000000000..9ca5c7447
--- /dev/null
+++ b/snippets/hexcode-to-RGB.md
@@ -0,0 +1,10 @@
+### Hexcode to RGB
+
+Converts hexadecimal colorcodes to RGB colorcodes by matching the hexidecimal (two-digit) red, green and blue values and 
+mapping their decimal equivalents to an array [r, g, b]. Returns a string `rgb(r,g,b)`.
+
+```js
+const hexToRgb = hex => `rgb(${hex.slice(1).match(/.{2}/g).map(x => parseInt(x, 16)).join()})`
+// hexToRgb('#27ae60') -> 'rgb(39,174,96)'
+// hexToRgb('#aaa') -> '[170, 170, 170]'
+```

From bbed04f0c93daf24a9d97505f276d36fa57ac2e1 Mon Sep 17 00:00:00 2001
From: Thomas Broadley <buriedunderbooks@hotmail.com>
Date: Fri, 15 Dec 2017 07:30:03 -0500
Subject: [PATCH 21/24] Fix typos

---
 CONTRIBUTING.md                  | 2 +-
 snippets/deep-flatten-array.md   | 2 +-
 snippets/shallow-clone-object.md | 2 +-
 snippets/validate-email.md       | 2 +-
 4 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 618a99b1a..40e6f2a17 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -64,7 +64,7 @@ Here's what you can do to help:
 - If your snippet's code is short enough (around 80 characters), you can make it a single-line function (although not mandatory). Otherwise, use multiple lines.
 - Prefer using `Array` methods whenever possible.
 - Prefer `Array.concat()` instead of `Array.push()` when working with `Array.reduce()`.
-- Use strict equality checking (`===` and `!==` instead of `==` and `!=`), unless you specificly have reason not to.
+- Use strict equality checking (`===` and `!==` instead of `==` and `!=`), unless you specifically have reason not to.
 - Prefer using the ternary operator (`condition ? trueResult : falseResult`) instead of `if else` statements whenever possible.
 - Avoid nesting ternary operators (but you can do it if you feel like you should).
 - You should define multiple variables on the same line (e.g. `const x = 0, y = 0`) on the same line whenever possible.
diff --git a/snippets/deep-flatten-array.md b/snippets/deep-flatten-array.md
index d33ff7e25..8e9497d33 100644
--- a/snippets/deep-flatten-array.md
+++ b/snippets/deep-flatten-array.md
@@ -2,7 +2,7 @@
 
 Use recursion.
 Use `Array.concat()` with an empty array (`[]`) and the spread operator (`...`) to flatten an array.
-Rrecursively flatten each element that is an array.
+Recursively flatten each element that is an array.
 
 ```js
 const deepFlatten = arr => [].concat(...arr.map(v => Array.isArray(v) ? deepFlatten(v) : v));
diff --git a/snippets/shallow-clone-object.md b/snippets/shallow-clone-object.md
index f3536999f..456f38462 100644
--- a/snippets/shallow-clone-object.md
+++ b/snippets/shallow-clone-object.md
@@ -1,6 +1,6 @@
 ### Shallow clone object
 
-Use `Object.assign()` and an empty object (`{}`) to create a shallo clone of the original.
+Use `Object.assign()` and an empty object (`{}`) to create a shallow clone of the original.
 
 ```js
 const shallowClone = obj => Object.assign({}, obj);
diff --git a/snippets/validate-email.md b/snippets/validate-email.md
index d83a41904..e168ac22b 100644
--- a/snippets/validate-email.md
+++ b/snippets/validate-email.md
@@ -1,6 +1,6 @@
 ### Validate email
 
-Use a regular experssion to check if the email is valid.
+Use a regular expression to check if the email is valid.
 Returns `true` if email is valid, `false` if not.
 
 ```js

From 3d6b44631a35691339011af6f437379a4e47eccf Mon Sep 17 00:00:00 2001
From: Angelos Chalaris <chalarangelo@gmail.com>
Date: Fri, 15 Dec 2017 14:33:12 +0200
Subject: [PATCH 22/24] Typos in README

---
 README.md | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/README.md b/README.md
index e6ada6c41..4dc791572 100644
--- a/README.md
+++ b/README.md
@@ -292,7 +292,7 @@ const countOccurrences = (arr, value) => arr.reduce((a, v) => v === value ? a +
 
 Use recursion.
 Use `Array.concat()` with an empty array (`[]`) and the spread operator (`...`) to flatten an array.
-Rrecursively flatten each element that is an array.
+Recursively flatten each element that is an array.
 
 ```js
 const deepFlatten = arr => [].concat(...arr.map(v => Array.isArray(v) ? deepFlatten(v) : v));
@@ -1003,7 +1003,7 @@ const objectToPairs = obj => Object.keys(obj).map(k => [k, obj[k]]);
 
 ### Shallow clone object
 
-Use `Object.assign()` and an empty object (`{}`) to create a shallo clone of the original.
+Use `Object.assign()` and an empty object (`{}`) to create a shallow clone of the original.
 
 ```js
 const shallowClone = obj => Object.assign({}, obj);
@@ -1330,7 +1330,7 @@ const uuid = _ =>
 
 ### Validate email
 
-Use a regular experssion to check if the email is valid.
+Use a regular expression to check if the email is valid.
 Returns `true` if email is valid, `false` if not.
 
 ```js

From 92ce0e528f357599ffdac4a5e191e19cc89847d4 Mon Sep 17 00:00:00 2001
From: Angelos Chalaris <chalarangelo@gmail.com>
Date: Fri, 15 Dec 2017 14:36:23 +0200
Subject: [PATCH 23/24] Update hexcode-to-RGB.md

---
 snippets/hexcode-to-RGB.md | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/snippets/hexcode-to-RGB.md b/snippets/hexcode-to-RGB.md
index 9ca5c7447..852a25ff8 100644
--- a/snippets/hexcode-to-RGB.md
+++ b/snippets/hexcode-to-RGB.md
@@ -1,10 +1,8 @@
 ### Hexcode to RGB
 
-Converts hexadecimal colorcodes to RGB colorcodes by matching the hexidecimal (two-digit) red, green and blue values and 
-mapping their decimal equivalents to an array [r, g, b]. Returns a string `rgb(r,g,b)`.
+Use `Array.slice()`, `Array.map()` and `match()` to convert a hexadecimal colorcode (prefixed with `#`) to a string with the RGB values.
 
 ```js
 const hexToRgb = hex => `rgb(${hex.slice(1).match(/.{2}/g).map(x => parseInt(x, 16)).join()})`
 // hexToRgb('#27ae60') -> 'rgb(39,174,96)'
-// hexToRgb('#aaa') -> '[170, 170, 170]'
 ```

From 7d874b0862325a96ff506340486f2db39e37f53a Mon Sep 17 00:00:00 2001
From: Angelos Chalaris <chalarangelo@gmail.com>
Date: Fri, 15 Dec 2017 14:37:51 +0200
Subject: [PATCH 24/24] Tag and build

---
 README.md    | 12 ++++++++++++
 tag_database |  1 +
 2 files changed, 13 insertions(+)

diff --git a/README.md b/README.md
index 4dc791572..776d746ef 100644
--- a/README.md
+++ b/README.md
@@ -104,6 +104,7 @@
 ### Utility
 * [Escape regular expression](#escape-regular-expression)
 * [Get native type of value](#get-native-type-of-value)
+* [Hexcode to RGB](#hexcode-to-rgb)
 * [Is array](#is-array)
 * [Is boolean](#is-boolean)
 * [Is function](#is-function)
@@ -1136,6 +1137,17 @@ const getType = v =>
 
 [⬆ back to top](#table-of-contents)
 
+### Hexcode to RGB
+
+Use `Array.slice()`, `Array.map()` and `match()` to convert a hexadecimal colorcode (prefixed with `#`) to a string with the RGB values.
+
+```js
+const hexToRgb = hex => `rgb(${hex.slice(1).match(/.{2}/g).map(x => parseInt(x, 16)).join()})`
+// hexToRgb('#27ae60') -> 'rgb(39,174,96)'
+```
+
+[⬆ back to top](#table-of-contents)
+
 ### Is array
 
 Use `Array.isArray()` to check if a value is classified as an array.
diff --git a/tag_database b/tag_database
index 20b8fe94a..3acb709f1 100644
--- a/tag_database
+++ b/tag_database
@@ -42,6 +42,7 @@ greatest-common-divisor-(GCD):math
 group-by:array
 hamming-distance:math
 head-of-list:array
+hexcode-to-RGB:utility
 initial-of-list:array
 initialize-array-with-range:array
 initialize-array-with-values:array