diff --git a/snippets/chunk-array.md b/snippets/chunk-array.md new file mode 100644 index 000000000..7953723f8 --- /dev/null +++ b/snippets/chunk-array.md @@ -0,0 +1,13 @@ +### Chunk Array + +Use `Array.apply()` to create a new array, that fits the number of chunks that will be produced. +Use `Array.map()` 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.apply(null, {length: Math.ceil(arr.length/size)}).map((v, i) => arr.slice(i*size, i*size+size)); + +// const myArray = [2, 2, 2, 2, 2, 2, 3, 2, 3, 2, 3, 2, 2]; +// chunk(myArray, 3) -> [ [ 2, 2, 2 ], [ 2, 2, 2 ], [ 3, 2, 3 ], [ 2, 3, 2 ], [ 2 ] ] +```