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g2601_2700.s2677_chunk_array.readme.md Maven / Gradle / Ivy

2677\. Chunk Array

Easy

Given an array `arr` and a chunk size `size`, return a **chunked** array. A **chunked** array contains the original elements in `arr`, but consists of subarrays each of length `size`. The length of the last subarray may be less than `size` if `arr.length` is not evenly divisible by `size`.

You may assume the array is the output of `JSON.parse`. In other words, it is valid JSON.

Please solve it without using lodash's `_.chunk` function.

**Example 1:**

**Input:** arr = [1,2,3,4,5], size = 1

**Output:** [[1],[2],[3],[4],[5]]

**Explanation:** The arr has been split into subarrays each with 1 element.

**Example 2:**

**Input:** arr = [1,9,6,3,2], size = 3

**Output:** [[1,9,6],[3,2]]

**Explanation:** The arr has been split into subarrays with 3 elements. However, only two elements are left for the 2nd subarray.

**Example 3:**

**Input:** arr = [8,5,3,2,6], size = 6

**Output:** [[8,5,3,2,6]]

**Explanation:** Size is greater than arr.length thus all elements are in the first subarray.

**Example 4:**

**Input:** arr = [], size = 1

**Output:** []

**Explanation:** There are no elements to be chunked so an empty array is returned.

**Constraints:**

*   `arr is a valid JSON array`
*   2 <= JSON.stringify(arr).length <= 105
*   `1 <= size <= arr.length + 1`