Travis build: 1370

README.md

@@ -145,6 +145,7 @@ average(1, 2, 3);
 * [`unionBy`](#unionby)
 * [`unionWith`](#unionwith)
 * [`uniqueElements`](#uniqueelements)
+* [`unzip`](#unzip)
 * [`without`](#without)
 * [`zip`](#zip)
 * [`zipObject`](#zipobject)
@@ -1966,6 +1967,36 @@ uniqueElements([1, 2, 2, 3, 4, 4, 5]); // [1,2,3,4,5]
 <br>[⬆ Back to top](#table-of-contents)
 
 
+### unzip
+
+Creates an array of arrays, ungrouping the elements in an array produced by [zip](#zip).
+
+Use `Math.max.apply()` to get the longest subarray in the array, `Array.map()` to make each element an array.
+Use `Array.reduce()` and `Array.forEach()` to map grouped values to individual arrays.
+
+```js
+const unzip = arr =>
+  arr.reduce(
+    (acc, val) => (val.forEach((v, i) => acc[i].push(v)), acc),
+    Array.from({
+      length: Math.max(...arr.map(x => x.length))
+    }).map(x => [])
+  );
+```
+
+<details>
+<summary>Examples</summary>
+
+```js
+unzip([['a', 1, true], ['b', 2, false]]); //[['a', 'b'], [1, 2], [true, false]]
+unzip([['a', 1, true], ['b', 2]]); //[['a', 'b'], [1, 2], [true]]
+```
+
+</details>
+
+<br>[⬆ Back to top](#table-of-contents)
+
+
 ### without
 
 Filters out the elements of an array, that have one of the specified values.

snippets/unzip.md

@@ -10,7 +10,7 @@ const unzip = arr =>
   arr.reduce(
     (acc, val) => (val.forEach((v, i) => acc[i].push(v)), acc),
     Array.from({
-      length: Math.max(...arr.map(x => x.length)),
+      length: Math.max(...arr.map(x => x.length))
     }).map(x => [])
   );
 ```