Justin® Tellisense

## merge-sort.txt
function mergeSort(arr) {
  if (arr.length === 1) {
    return arr;
  }
  const center = Math.floor(arr.length / 2);
  const left = arr.slice(0, center);
  const right = arr.slice(center);

  return merge(mergeSort(left), mergeSort(right));
}

## Advanced Array methods: Native javascript code for forEach, map, filter, reduce, every, some

//forEach

Array.prototype.myforEach = function(cb) {
    for (let i = 0; i < this.length; i++){
        cb(this[i], i, this);
    }
    return undefined;
};
	function mergeSort(arr) {
	if (arr.length === 1) {
	return arr;
	}
	const center = Math.floor(arr.length / 2);
	const left = arr.slice(0, center);
	const right = arr.slice(center);

	return merge(mergeSort(left), mergeSort(right));
	}

	//forEach

	Array.prototype.myforEach = function(cb) {
	for (let i = 0; i < this.length; i++){
	cb(this[i], i, this);
	}
	return undefined;
	};