30 lines
853 B
Markdown
30 lines
853 B
Markdown
---
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title: Split array into n chunks
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tags: array
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expertise: intermediate
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author: chalarangelo
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cover: blog_images/dark-leaves-2.jpg
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firstSeen: 2020-05-04T13:00:46+03:00
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lastUpdated: 2020-11-03T21:46:13+02:00
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---
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Chunks an array into `n` smaller arrays.
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- Use `Math.ceil()` and `Array.prototype.length` to get the size of each chunk.
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- Use `Array.from()` to create a new array of size `n`.
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- Use `Array.prototype.slice()` to map each element of the new array to a chunk the length of `size`.
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- If the original array can't be split evenly, the final chunk will contain the remaining elements.
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```js
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const chunkIntoN = (arr, n) => {
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const size = Math.ceil(arr.length / n);
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return Array.from({ length: n }, (v, i) =>
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arr.slice(i * size, i * size + size)
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);
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}
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```
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```js
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chunkIntoN([1, 2, 3, 4, 5, 6, 7], 4); // [[1, 2], [3, 4], [5, 6], [7]]
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```
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