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snippets/js/s/chunk.md

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+---
+title: Split into chunks
+type: snippet
+language: javascript
+tags: [array]
+cover: filter-coffee-pot
+dateModified: 2020-11-03T21:35:12+02:00
+---
+
+Chunks an array into smaller arrays of a specified size.
+
+- Use `Array.from()` to create a new array, that fits the number of chunks that will be produced.
+- Use `Array.prototype.slice()` to map each element of the new array to a chunk the length of `size`.
+- If the original array can't be split evenly, the final chunk will contain the remaining elements.
+
+```js
+const chunk = (arr, size) =>
+  Array.from({ length: Math.ceil(arr.length / size) }, (v, i) =>
+    arr.slice(i * size, i * size + size)
+  );
+```
+
+```js
+chunk([1, 2, 3, 4, 5], 2); // [[1, 2], [3, 4], [5]]
+```