diff --git a/.gitignore b/.gitignore
index bc23f6a88..9fe5cb489 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,3 @@
 node_modules/
-
 currentSnippet\.js
+*.md.temp.js
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index d2bdbf7e1..618a99b1a 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).
+- 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 65a72b1a0..7160b9afb 100644
--- a/README.md
+++ b/README.md
@@ -9,108 +9,116 @@
 
 ## 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)
+* [Nth element of array](#nth-element-of-array)
+* [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)
+
+### Date
+* [Get days difference between dates](#get-days-difference-between-dates)
+
+### 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)
+* [Round number to n digits](#round-number-to-n-digits)
+* [Standard deviation](#standard-deviation)
+
+### Media
+* [Speech synthesis (experimental)](#speech-synthesis-experimental)
+
+### Object
+* [Object from key value pairs](#object-from-key-value-pairs)
+* [Object to key value pairs](#object-to-key-value-pairs)
+* [Shallow clone object](#shallow-clone-object)
+
+### 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)
+* [Number to array of digits](#number-to-array-of-digits)
 * [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`.
+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);
@@ -118,36 +126,40 @@ 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`.
 
 ```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]
 ```
 
 [⬆ 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`.
 
 ```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]
 ```
 
 [⬆ back to top](#table-of-contents)
+
 ### Array union
 
 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]
 ```
 
 [⬆ 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.
@@ -158,6 +170,329 @@ const average = arr => arr.reduce((acc, val) => acc + val, 0) / arr.length;
 ```
 
 [⬆ 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.
+Use `Array.slice()` to map each element of the new array to a chunk the length of `size`.
+If the original array can't be split evenly, the final chunk will contain the remaining elements.
+
+```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]
+```
+
+[⬆ back to top](#table-of-contents)
+
+### Compact
+
+Use `Array.filter()` to filter out falsey values (`false`, `null`, `0`, `""`, `undefined`, and `NaN`).
+
+```js
+const compact = (arr) => arr.filter(v => v);
+// compact([0, 1, false, 2, '', 3, 'a', 'e'*23, NaN, 's', 34]) -> [ 1, 2, 3, 'a', 's', 34 ]
+```
+
+[⬆ 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.
+
+```js
+const countOccurrences = (arr, value) => arr.reduce((a, v) => v === value ? a + 1 : a + 0, 0);
+// countOccurrences([1,1,2,1,2,3], 1) -> 3
+```
+
+[⬆ back to top](#table-of-contents)
+
+### Deep flatten array
+
+Use recursion.
+Use `Array.reduce()` to get all elements that are not arrays, flatten each element that is an array.
+
+```js
+const deepFlatten = arr =>
+  arr.reduce((a, v) => a.concat(Array.isArray(v) ? deepFlatten(v) : v), []);
+// deepFlatten([1,[2],[[3],4],5]) -> [1,2,3,4,5]
+```
+
+[⬆ 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`. 
+Returns the remaining elements.
+
+```js
+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]
+```
+
+[⬆ 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)
+
+### Nth element of array
+
+Use `Array.slice()` to get an array containing the nth element at the first place. 
+If the index is out of bounds, return `[]`.
+Omit the second argument, `n`, to get the first element of the array.
+
+```js
+const nth = (arr, n=0) => (n>0? arr.slice(n,n+1) : arr.slice(n))[0];
+// nth(['a','b','c'],1) -> 'b'
+// nth(['a','b','b']-2) -> 'a'
+```
+
+[⬆ 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.
@@ -169,28 +504,98 @@ const bottomVisible = _ =>
 ```
 
 [⬆ 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.
+### Current URL
+
+Use `window.location.href` to get current URL.
 
 ```js
-const capitalizeEveryWord = str => str.replace(/\b[a-z]/g, char => char.toUpperCase());
-// capitalizeEveryWord('hello world!') -> 'Hello World!'
+const currentUrl = _ => window.location.href;
+// currentUrl() -> 'https://google.com'
 ```
 
 [⬆ 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.
+### Element is visible in viewport
+
+Use `Element.getBoundingClientRect()` and the `window.inner(Width|Height)` values
+to determine if a given element is visible in the viewport.
+Omit the second argument to determine if the element is entirely visible, or specify `true` to determine if
+it is partially visible.
 
 ```js
-const capitalize = (str, lowerRest = false) =>
-  str.slice(0, 1).toUpperCase() + (lowerRest ? str.slice(1).toLowerCase() : str.slice(1));
-// capitalize('myName', true) -> 'Myname'
+const elementIsVisibleInViewport = (el, partiallyVisible = false) => {
+  const { top, left, bottom, right } = el.getBoundingClientRect();
+  return partiallyVisible
+    ? ((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)
 ```
 
 [⬆ back to top](#table-of-contents)
+
+### Get scroll position
+
+Use `pageXOffset` and `pageYOffset` if they are defined, otherwise `scrollLeft` and `scrollTop`.
+You can omit `el` to use a default value of `window`.
+
+```js
+const getScrollPos = (el = window) =>
+  ({x: (el.pageXOffset !== undefined) ? el.pageXOffset : el.scrollLeft,
+    y: (el.pageYOffset !== undefined) ? el.pageYOffset : el.scrollTop});
+// getScrollPos() -> {x: 0, y: 200}
+```
+
+[⬆ 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)
+
+### 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)
+## Date
+
+### Get days difference between dates
+
+Calculate the difference (in days) between to `Date` objects.
+
+```js
+const getDaysDiffBetweenDates = (dateInitial, dateFinal) => (dateFinal - dateInitial) / (1000 * 3600 * 24);
+// getDaysDiffBetweenDates(new Date("2017-12-13"), new Date("2017-12-22")) -> 9
+```
+
+[⬆ 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.
@@ -207,74 +612,7 @@ chainAsync([
 ```
 
 [⬆ 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.
-Use `Array.slice()` to map each element of the new array to a chunk the length of `size`.
-If the original array can't be split evenly, the final chunk will contain the remaining elements.
-
-```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]
-```
-
-[⬆ 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`).
-
-```js
-const compact = (arr) => arr.filter(v => v);
-// compact([0, 1, false, 2, '', 3, 'a', 'e'*23, NaN, 's', 34]) -> [ 1, 2, 3, 'a', 's', 34 ]
-```
-
-[⬆ 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.
-
-```js
-const countOccurrences = (arr, value) => arr.reduce((a, v) => v === value ? a + 1 : a + 0, 0);
-// countOccurrences([1,1,2,1,2,3], 1) -> 3
-```
-
-[⬆ 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.
@@ -283,469 +621,16 @@ 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
 ```
 
 [⬆ back to top](#table-of-contents)
-### Deep flatten array
 
-Use recursion.
-Use `Array.reduce()` to get all elements that are not arrays, flatten each element that is an array.
-
-```js
-const deepFlatten = arr =>
-  arr.reduce((a, v) => a.concat(Array.isArray(v) ? deepFlatten(v) : v), []);
-// deepFlatten([1,[2],[[3],4],5]) -> [1,2,3,4,5]
-```
-
-[⬆ 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`. 
-Returns the remaining elements.
-
-```js
-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]
-```
-
-[⬆ back to top](#table-of-contents)
-### Element is visible in viewport
-
-Use `Element.getBoundingClientRect()` and the `window.inner(Width|Height)` values
-to determine if a given element is visible in the viewport.
-Omit the second argument to determine if the element is entirely visible, or specify `true` to determine if
-it is partially visible.
-
-```js
-const elementIsVisibleInViewport = (el, partiallyVisible = false) => {
-  const { top, left, bottom, right } = el.getBoundingClientRect();
-  return partiallyVisible
-    ? ((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)
-```
-
-[⬆ 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`.
-You can omit `el` to use a default value of `window`.
-
-```js
-const getScrollPos = (el = window) =>
-  ({x: (el.pageXOffset !== undefined) ? el.pageXOffset : el.scrollLeft,
-    y: (el.pageYOffset !== undefined) ? el.pageYOffset : el.scrollTop});
-// getScrollPos() -> {x: 0, y: 200}
-```
-
-[⬆ 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)
-### 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 +641,7 @@ 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 +661,7 @@ 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 +673,7 @@ 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 +690,143 @@ 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)
+
+### Round number to n digits
+
+Use `Math.round()` and template literals to round the number to the specified number of digits.
+Omit the second argument, `decimals` to round to an integer.
+
+```js
+const round = (n, decimals=0) => Number(`${Math.round(`${n}e${decimals}`)}e-${decimals}`);
+// round(1.005, 2) -> 1.01
+```
+
+[⬆ 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
@@ -927,55 +840,152 @@ 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)
 ```
 
 [⬆ back to top](#table-of-contents)
-### Sum of array of numbers
+## Media
 
-Use `Array.reduce()` to add each value to an accumulator, initialized with a value of `0`.
+### Speech synthesis (experimental)
+
+Use `SpeechSynthesisUtterance.voice` and `indow.speechSynthesis.getVoices()` to convert a message to speech.
+Use `window.speechSynthesis.speak()` to play the message.
+
+Learn more about the [SpeechSynthesisUtterance interface of the Web Speech API](https://developer.mozilla.org/en-US/docs/Web/API/SpeechSynthesisUtterance).
 
 ```js
-const sum = arr => arr.reduce((acc, val) => acc + val, 0);
-// sum([1,2,3,4]) -> 10
+const speak = message => {
+  const msg = new SpeechSynthesisUtterance(message);
+  msg.voice = window.speechSynthesis.getVoices()[0];
+  window.speechSynthesis.speak(msg);
+};
+// speak('Hello, World') -> plays the message
 ```
 
 [⬆ back to top](#table-of-contents)
-### Swap values of two variables
+## Object
 
-Use array destructuring to swap values between two variables.
+### Object from key-value pairs
+
+Use `Array.reduce()` to create and combine key-value pairs.
 
 ```js
-[varA, varB] = [varB, varA];
-// [x, y] = [y, x]
+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)
-### Tail of list
 
-Return `arr.slice(1)` if the array's `length` is more than `1`, otherwise return the whole array.
+### 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 tail = arr => arr.length > 1 ? arr.slice(1) : arr;
-// tail([1,2,3]) -> [2,3]
-// tail([1]) -> [1]
+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)
-### Take
 
-Use `Array.slice()` to create a slice of the array with `n` elements taken from the beginning.
+### Shallow clone object
+
+Use the object `...spread` operator to spread the properties of the target object into the clone.
 
 ```js
-const take = (arr, n = 1) => arr.slice(0, n);
-
-// take([1, 2, 3], 5) -> [1, 2, 3]
-// take([1, 2, 3], 0) -> []
+const shallowClone = obj => ({ ...obj });
+/*
+const a = { x: true, y: 1 };
+const b = shallowClone(a);
+a === b -> false
+*/
 ```
 
 [⬆ back to top](#table-of-contents)
+## String
+
+### 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 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)
+
+### 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)
+
+### 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 +998,194 @@ 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 `console.time()` and `console.timeEnd()` to measure the difference between the start and end times to determine how long the callback took to execute.
+
+```js
+const timeTaken = callback => {
+  console.time('timeTaken');
+  const r = callback();
+  console.timeEnd('timeTaken');
+  return r;
+};
+// timeTaken(() => Math.pow(2, 10)) -> 1024
+// (logged): timeTaken: 0.02099609375ms
+```
+
+[⬆ back to top](#table-of-contents)
+
+### Number to array of digits
+
+Convert the number to a string, use `split()` to convert build an array.
+Use `Array.map()` and `parseInt()` to transform each value to an integer. 
+
+```js
+const digitize = n => (''+n).split('').map(i => parseInt(i));
+// digitize(2334) -> [2, 3, 3, 4]
+```
+
+[⬆ 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 +1200,7 @@ 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 +1214,7 @@ const uuid = _ =>
 ```
 
 [⬆ back to top](#table-of-contents)
+
 ### Validate email
 
 Use a regular experssion to check if the email is valid.
@@ -1037,6 +1227,7 @@ 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 +1240,7 @@ 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 +1251,7 @@ 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/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..4c6d5f82e 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",
+    "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 220469705..000000000
--- a/scripts/builder.js
+++ /dev/null
@@ -1,57 +0,0 @@
-var fs = require('fs-extra');
-var path = require('path');
-
-var snippetsPath = './snippets';
-var staticPartsPath = './static-parts';
-
-var snippets = {}, startPart = '', endPart = '', output = '';
-
-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 {
-  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'}`;
-  fs.writeFileSync('README.md', output);
-}
-catch (err){
-  console.log('Error during README generation: '+err);
-  process.exit(1);
-}
-
-console.timeEnd('Builder');
diff --git a/scripts/lint-script.js b/scripts/lint-script.js
new file mode 100644
index 000000000..5d6d8721e
--- /dev/null
+++ b/scripts/lint-script.js
@@ -0,0 +1,44 @@
+/*
+  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'), chalk = require('chalk');
+// Set variables for paths
+var snippetsPath = './snippets';
+// 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 (${snippet})`);
+    // Synchronously read data from the snippet, get the code, write it to a temporary file
+    let snippetData = fs.readFileSync(path.join(snippetsPath,snippet),'utf8');
+    let originalCode = snippetData.slice(snippetData.indexOf('```js')+5,snippetData.lastIndexOf('```'));
+    fs.writeFileSync(`${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.green('SUCCESS!')} Linted snippet: ${snippet}`);
+      // Log the time taken for the file
+      console.timeEnd(`Linter (${snippet})`);
+    });
+  }
+}
+catch (err){  // Handle errors (hopefully not!)
+  console.log(`${chalk.red('ERROR!')} During linting: ${err}`);
+  process.exit(1);
+}
diff --git a/scripts/lintSnippet.js b/scripts/lintSnippet.js
deleted file mode 100644
index a53686ee5..000000000
--- a/scripts/lintSnippet.js
+++ /dev/null
@@ -1,31 +0,0 @@
-var fs = require('fs-extra');
-var cp = require('child_process');
-var path = require('path');
-
-var snippetsPath = './snippets';
-var snippetFilename = '';
-
-console.time('Linter');
-
-if(process.argv.length < 3){
-  console.log('Please specify the filename of a snippet to be linted.');
-  console.log('Example usage: npm run lint "snippet-file.md"');
-  process.exit(0);
-}
-else {
-  snippetFilename = process.argv[2];
-  let snippetData = fs.readFileSync(path.join(snippetsPath,snippetFilename),'utf8');
-  try {
-    let originalCode = snippetData.slice(snippetData.indexOf('```js')+5,snippetData.lastIndexOf('```'));
-    fs.writeFileSync('currentSnippet.js',`${originalCode}`);
-    cp.exec('semistandard "currentSnippet.js" --fix',{},(error, stdOut, stdErr) => {
-      let lintedCode = fs.readFileSync('currentSnippet.js','utf8');
-      fs.writeFile(path.join(snippetsPath,snippetFilename), `${snippetData.slice(0, snippetData.indexOf('```js')+5)+lintedCode+'```\n'}`);
-      console.timeEnd('Linter');
-    });
-  }
-  catch (err){
-    console.log('Error during snippet loading: '+err);
-    process.exit(1);
-  }
-}
diff --git a/scripts/tag-script.js b/scripts/tag-script.js
new file mode 100644
index 000000000..8537b3009
--- /dev/null
+++ b/scripts/tag-script.js
@@ -0,0 +1,67 @@
+/*
+  This is the tagger script that updates the tag_databse file and logs stats for snippet tags.
+  Run using `npm run tagger`.
+*/
+// Load modules
+const fs = require('fs-extra'), path = require('path'), chalk = require('chalk');
+// Set variables for paths
+const snippetsPath = './snippets';
+// Set variables for script
+let snippets = {}, output = '', tagDbData = {}, missingTags = 0, tagDbStats = {};
+// Load helper functions (these are from existing snippets in 30 seconds of code!)
+const objectFromPairs = arr => arr.reduce((a, v) => (a[v[0]] = v[1], a), {});
+const countOccurrences = (arr, value) => arr.reduce((a, v) => v === value ? a + 1 : a + 0, 0);
+// Start the timer of the script
+console.time('Tagger');
+// Synchronously read all snippets and sort them as necessary (case-insensitive)
+try {
+  let snippetFilenames = fs.readdirSync(snippetsPath);
+  snippetFilenames.sort((a, b) => {
+    a = a.toLowerCase();
+    b = b.toLowerCase();
+    if (a < b) return -1;
+    if (a > b) return 1;
+    return 0;
+  });
+  // Store the data read from each snippet in the appropriate object
+  for(let snippet of snippetFilenames)  snippets[snippet] = fs.readFileSync(path.join(snippetsPath,snippet),'utf8');
+}
+catch (err){ // Handle errors (hopefully not!)
+  console.log(`${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/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);
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-sample.md b/snippets/array-sample.md
new file mode 100644
index 000000000..d48f13840
--- /dev/null
+++ b/snippets/array-sample.md
@@ -0,0 +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. 
+
+```js
+const sample = arr => arr[Math.floor(Math.random() * arr.length)];
+
+// sample([3, 7, 9, 11]) -> 9 
+```
\ No newline at end of file
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/array-zip.md b/snippets/array-zip.md
new file mode 100644
index 000000000..08c40ed68
--- /dev/null
+++ b/snippets/array-zip.md
@@ -0,0 +1,17 @@
+### 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]]
+```
diff --git a/snippets/chunk-array.md b/snippets/chunk-array.md
index c14bf269d..ba3e5e42e 100644
--- a/snippets/chunk-array.md
+++ b/snippets/chunk-array.md
@@ -7,5 +7,5 @@ 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]]
 ```
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/curry.md b/snippets/curry.md
index edb95461f..bbee4086c 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
 ```
diff --git a/snippets/deep-flatten-array.md b/snippets/deep-flatten-array.md
index c350d848c..1dffe860f 100644
--- a/snippets/deep-flatten-array.md
+++ b/snippets/deep-flatten-array.md
@@ -1,10 +1,9 @@
 ### Deep flatten array
 
 Use recursion.
-Use `Array.reduce()` to get all elements that are not arrays, flatten each element that is an array.
+Use `[].concat()` and the spread operator `...` to flatten an array, and recursively 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]
 ```
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/get-days-difference-between-dates.md b/snippets/get-days-difference-between-dates.md
new file mode 100644
index 000000000..ae93ce79d
--- /dev/null
+++ b/snippets/get-days-difference-between-dates.md
@@ -0,0 +1,8 @@
+### Get days difference between dates
+
+Calculate the difference (in days) between to `Date` objects.
+
+```js
+const getDaysDiffBetweenDates = (dateInitial, dateFinal) => (dateFinal - dateInitial) / (1000 * 3600 * 24);
+// getDaysDiffBetweenDates(new Date("2017-12-13"), new Date("2017-12-22")) -> 9
+```
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
 ```
diff --git a/snippets/measure-time-taken-by-function.md b/snippets/measure-time-taken-by-function.md
index 44e099d7e..ca476ac71 100644
--- a/snippets/measure-time-taken-by-function.md
+++ b/snippets/measure-time-taken-by-function.md
@@ -1,13 +1,14 @@
 ### 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.
+Use `console.time()` and `console.timeEnd()` to measure the difference between the start and end times to determine how long the callback took to execute.
 
 ```js
 const timeTaken = callback => {
-  const t0 = performance.now(), r = callback();
-  console.log(performance.now() - t0);
+  console.time('timeTaken');
+  const r = callback();
+  console.timeEnd('timeTaken');
   return r;
 };
-// timeTaken(() => Math.pow(2, 10)) -> 1024 (0.010000000009313226 logged in console)
+// timeTaken(() => Math.pow(2, 10)) -> 1024
+// (logged): timeTaken: 0.02099609375ms
 ```
diff --git a/snippets/nth-element-of-array.md b/snippets/nth-element-of-array.md
new file mode 100644
index 000000000..15552d071
--- /dev/null
+++ b/snippets/nth-element-of-array.md
@@ -0,0 +1,11 @@
+### Nth element of array
+
+Use `Array.slice()` to get an array containing the nth element at the first place. 
+If the index is out of bounds, return `[]`.
+Omit the second argument, `n`, to get the first element of the array.
+
+```js
+const nth = (arr, n=0) => (n>0? arr.slice(n,n+1) : arr.slice(n))[0];
+// nth(['a','b','c'],1) -> 'b'
+// nth(['a','b','b']-2) -> 'a'
+```
diff --git a/snippets/number-to-array-of-digits.md b/snippets/number-to-array-of-digits.md
new file mode 100644
index 000000000..f00a62b75
--- /dev/null
+++ b/snippets/number-to-array-of-digits.md
@@ -0,0 +1,9 @@
+### Number to array of digits
+
+Convert the number to a string, use `split()` to convert build an array.
+Use `Array.map()` and `parseInt()` to transform each value to an integer. 
+
+```js
+const digitize = n => (''+n).split('').map(i => parseInt(i));
+// digitize(2334) -> [2, 3, 3, 4]
+```
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/pipe.md b/snippets/pipe.md
index c61ec042c..f46a32148 100644
--- a/snippets/pipe.md
+++ b/snippets/pipe.md
@@ -1,8 +1,15 @@
 ### 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
+*/
 ```
diff --git a/snippets/redirect-to-url.md b/snippets/redirect-to-URL.md
similarity index 100%
rename from snippets/redirect-to-url.md
rename to snippets/redirect-to-URL.md
diff --git a/snippets/round-number-to-n-digits.md b/snippets/round-number-to-n-digits.md
new file mode 100644
index 000000000..a35308ce0
--- /dev/null
+++ b/snippets/round-number-to-n-digits.md
@@ -0,0 +1,9 @@
+### Round number to n digits
+
+Use `Math.round()` and template literals to round the number to the specified number of digits.
+Omit the second argument, `decimals` to round to an integer.
+
+```js
+const round = (n, decimals=0) => Number(`${Math.round(`${n}e${decimals}`)}e-${decimals}`);
+// round(1.005, 2) -> 1.01
+```
diff --git a/snippets/shallow-clone-object.md b/snippets/shallow-clone-object.md
new file mode 100644
index 000000000..c6873c0d8
--- /dev/null
+++ b/snippets/shallow-clone-object.md
@@ -0,0 +1,12 @@
+### Shallow clone object
+
+Use the object `...spread` operator to spread the properties of the target object into the clone.
+
+```js
+const shallowClone = obj => ({ ...obj });
+/*
+const a = { x: true, y: 1 };
+const b = shallowClone(a);
+a === b -> false
+*/
+```
diff --git a/snippets/speech-synthesis-(experimental).md b/snippets/speech-synthesis-(experimental).md
new file mode 100644
index 000000000..c9e6a288c
--- /dev/null
+++ b/snippets/speech-synthesis-(experimental).md
@@ -0,0 +1,15 @@
+### Speech synthesis (experimental)
+
+Use `SpeechSynthesisUtterance.voice` and `indow.speechSynthesis.getVoices()` to convert a message to speech.
+Use `window.speechSynthesis.speak()` to play the message.
+
+Learn more about the [SpeechSynthesisUtterance interface of the Web Speech API](https://developer.mozilla.org/en-US/docs/Web/API/SpeechSynthesisUtterance).
+
+```js
+const speak = message => {
+  const msg = new SpeechSynthesisUtterance(message);
+  msg.voice = window.speechSynthesis.getVoices()[0];
+  window.speechSynthesis.speak(msg);
+};
+// speak('Hello, World') -> plays the message
+```
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)
 ```
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/snippets/takeRight.md b/snippets/takeRight.md
new file mode 100644
index 000000000..03fc634fa
--- /dev/null
+++ b/snippets/takeRight.md
@@ -0,0 +1,10 @@
+### takeRight
+
+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]
+// takeRight([1, 2, 3]) -> []
+```
\ No newline at end of file
diff --git a/snippets/without.md b/snippets/without.md
new file mode 100644
index 000000000..00876b5c9
--- /dev/null
+++ b/snippets/without.md
@@ -0,0 +1,12 @@
+### 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 ]
+
+```
diff --git a/tag_database b/tag_database
new file mode 100644
index 000000000..d1733c293
--- /dev/null
+++ b/tag_database
@@ -0,0 +1,89 @@
+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-days-difference-between-dates:date
+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
+nth-element-of-array:array
+number-to-array-of-digits:utility
+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
+round-number-to-n-digits:math
+run-promises-in-series:function
+scroll-to-top:browser
+shallow-clone-object:object
+shuffle-array:array
+similarity-between-arrays:array
+sleep:function
+sort-characters-in-string-(alphabetical):string
+speech-synthesis-(experimental):media
+standard-deviation:math
+sum-of-array-of-numbers:array
+swap-values-of-two-variables:utility
+tail-of-list:array
+take:array
+takeRight: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
+without:array
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"