22 lines
483 B
Markdown
22 lines
483 B
Markdown
---
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title: Compact array
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tags: array
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expertise: beginner
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cover: blog_images/basket-paper.jpg
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firstSeen: 2017-12-14T08:19:15+02:00
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lastUpdated: 2020-10-22T20:23:47+03:00
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---
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Removes falsy values from an array.
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- Use `Array.prototype.filter()` to filter out falsy values (`false`, `null`, `0`, `""`, `undefined`, and `NaN`).
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```js
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const compact = arr => arr.filter(Boolean);
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```
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```js
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compact([0, 1, false, 2, '', 3, 'a', 'e' * 23, NaN, 's', 34]);
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// [ 1, 2, 3, 'a', 's', 34 ]
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```
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