compare arrays

array_compare.js

Array.prototype.isEqual = function (arr) {
	if (arr.length != this.length || !(arr instanceof Array)) return false;
  
  for (let k = 0, len = this.length; k < len; k++) {
  	if (this[k] instanceof Array && arr[k] instanceof Array) {
    	if (!this[k].isEqual(arr[k])) return false;
    } else {
    	if (arr[k] !== this[k]) return false;
    }
  }
  
  return true;
}