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30-seconds-of-code/snippets/similarity.md
2020-09-15 21:52:00 +03:00

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---
title: similarity
tags: array,math,beginner
---
Returns an array of elements that appear in both arrays.
- Use `Array.prototype.filter()` to remove values that are not part of `values`, determined using `Array.prototype.includes()`.
```js
const similarity = (arr, values) => arr.filter(v => values.includes(v));
```
```js
similarity([1, 2, 3], [1, 2, 4]); // [1, 2]
```