Write a function that splits an array (first argument) into groups the length of size (second argument) and returns them as a multidimensional array

Question

I am working through a javascript problem that asks me to:

Write a function that splits an array (first argument) into groups the length of size (second argument) an

Answer 1

function chunk(arr, size) {
  var newArr = [];
  // x is less than or equals arr.length.
  for(var x = 0; x <= arr.length; x++){
     newArr.push(arr.splice(0, size));
  }

  if (arr.length){
     newArr.push(arr);
  }
  return newArr;
}

chunk(['a', 'b', 'c', 'd'], 2);