sub-array-slitter.js

class SubArraySplitter {
  constructor(arr, num) {
    this.arr = arr;
    this.num = num;
    this.splitArray = [];
    this.iterate();
  }

  iterate() {
    while (this.arr.length > 1) {
      this.segment();
    }

    if (this.arr.length === 1) {
      this.splitArray.push(...this.arr);
    }
  }

  segment() {
    this.splitArray.push(this.arr.slice(0, this.num));
    this.arr = this.arr.slice(this.num, this.arr.length);
  }
}

const arr = new SubArraySplitter([1, 2, 3, 4], 2); //?
arr.splitArray; //?

const arrTwo = new SubArraySplitter([1, 2, 3, 4, 5], 2); //?
arrTwo.splitArray; //?

const arrThree = new SubArraySplitter([1, 2, 3, 4, 5, 6], 2); //?
arrThree.splitArray; //?