18 lines
446 B
Markdown
18 lines
446 B
Markdown
---
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title: includesAll
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tags: array,beginner
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---
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Returns `true` if all the elements ιν `values` are included in `arr`, `false` otherwise.
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Use `Array.prototype.every()` and `Array.prototype.includes()` to check if all elements of `values` are included in `arr`.
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```js
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const includesAll = (arr, values) => values.every(v => arr.includes(v));
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```
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```js
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includesAll([1, 2, 3, 4], [1, 4]); // true
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includesAll([1, 2, 3, 4], [1, 5]); // false
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```
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