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refactor & elegant solution

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King
2017-12-14 02:56:47 -05:00
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snippets/compact.md
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@ -3,6 +3,6 @@
Use `.filter()` to filter falsey values. For example false, null, 0, "", undefined, and NaN are falsey. Use `.filter()` to filter falsey values. For example false, null, 0, "", undefined, and NaN are falsey.
```js ```js
const compact = (arr) => arr.filter( v => [0, null, false, '', undefined].indexOf(v) === -1 && v); 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 ] // compact([0, 1, false, 2, '', 3, 'a', 'e'*23, NaN, 's', 34]) -> [ 1, 2, 3, 'a', 's', 34 ]
``` ```