Add chunkIntoN

snippets/chunkIntoN.md

@@ -0,0 +1,24 @@
+---
+title: chunkIntoN
+tags: array,intermediate
+---
+
+Chunks an array into `n` smaller arrays.
+
+Use `Math.ceil()` and `Array.prototype.length` to get the size of each chunk.
+Use `Array.from()` to create a new array of size `n`.
+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 chunkIntoN = (arr, n) => {
+  const size = Math.ceil(arr.length / n);
+  return Array.from({ length: n }, (v, i) =>
+    arr.slice(i * size, i * size + size)
+  );
+}
+```
+
+```js
+chunkIntoN([1, 2, 3, 4, 5, 6, 7], 4); // [[1,2], [3,4], [5,6], [7]]
+```