22 lines
515 B
Markdown
22 lines
515 B
Markdown
---
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title: Array similarity
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tags: array,math
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expertise: beginner
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cover: blog_images/dark-leaves-5.jpg
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firstSeen: 2017-12-17T16:41:31+02:00
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lastUpdated: 2020-10-22T20:24:30+03:00
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---
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Returns an array of elements that appear in both arrays.
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- Use `Array.prototype.includes()` to determine values that are not part of `values`.
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- Use `Array.prototype.filter()` to remove them.
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```js
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const similarity = (arr, values) => arr.filter(v => values.includes(v));
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```
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```js
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similarity([1, 2, 3], [1, 2, 4]); // [1, 2]
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```
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