ES6 break array Into n equal size

divide-array-into-n-equal-size.js

/**
 * 
 * Given an array of length >= 0, and a positive integer N, return the contents of the array divided into N equally sized arrays.
 * Where the size of the original array cannot be divided equally by N, the final part should have a length equal to the remainder.
 * 
 * #my solution
 * it's modern, its pure function, uses ES6 method channing and also it returns brand new array with out modifying the original
 *
 * @param {[]} arr original array
 * @param {number} divideBy number
 * @returns {[]}
 */

const breakArrayIntoChunks = (arr, divideBy) => {
  return arr
    .map((_, index) =>
      index % divideBy ? undefined : [...arr.slice(index, index + divideBy)]//slice the aray from i to n
    )
    .filter(chunk => chunk)//remove undefind content
}


/**
 * 
 * test
 */
const items = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15]
const n = 2
console.log(breakArrayIntoChunks(array, n))