Nodejs Utililty Methods Array Compare

Array.prototype.compare = function(secondArray, compareFunction){
    if(this.length != secondArray.length){
        return false;
    for(var i = 0; i < this.length; i++){
        if(this[i] instanceof Array && secondArray instanceof Array){
            this[i].compare(secondArray[i]);
        }else if(this[i] instanceof Object && secondArray instanceof Object){
            if(!compareFunction(this[i], secondArray[i])){
...

Array.prototype.compare = function(testArr) {
    if (this.length != testArr.length) return false;
    for (var i = 0; i < testArr.length; i++) {
        if (this[i].compare) { 
            if (!this[i].compare(testArr[i])) return false;
        if (this[i] !== testArr[i]) return false;
    return true;
...

Array.prototype.compare = function(testArr) {
  if (this.length != testArr.length) return false;
  for (var i = 0; i < testArr.length; i++) {
    if (this[i].compare) { 
      if (!this[i].compare(testArr[i])) return false;
    };
    if (this[i] !== testArr[i]) return false;
  };
  return true;
...

Array.prototype.compareArray = function(array1) {
  var array1 = array1;
  var array2 = this;
  if (array1.length === array2.length) {
    for (var i = 0; i < array1.length; i++) {
      for(var c = 0; c < array2.length; i++) {
        if (array1[i] === array2[c]) {
          return true;
  } else {
    return false;
  };

Array.prototype.compareArrays = function(arr) {
    if (this.length != arr.length) return false;
    for (var i = 0; i < arr.length; i++) {
        if (this[i].compareArrays) { 
            if (!this[i].compareArrays(arr[i])) return false;
            else continue;
        if (this[i] != arr[i]) return false;
    return true;
};
beforeEach(function() {
  this.addMatchers({
    toArrayEq: function(other){
      var that = this.actual;
      return that.compareArrays(other);  
  })
});

Array.prototype.compareArrays = function(arr) {
    if (this.length != arr.length) return false;
    for (var i = 0; i < arr.length; i++) {
        if (this[i].compareArrays) { 
            if (!this[i].compareArrays(arr[i])) return false;
            else continue;
        if (this[i] != arr[i]) return false;
    return true;

Array.prototype.compareLexicographically = function (arr){
    for(var ind = 0; ind < Math.min(this.length, arr.length); ind++){
        if(arr[ind] !== this[ind]){
            return this[ind] < arr[ind] ? -1 : 1;
    if(this.length != arr.length){
        this.length < arr.length ? -1 : 1;
    return 0;
var a = 'abc'.split(''), b = 'acb'.split('');
console.log(a.compareLexicographically(b));

Array.prototype.compareLexicographically = function (arr){
    for (var ind = 0; ind < Math.min(this.length, arr.length); ind++) {
        if (arr[ind] !== this[ind]) {
            return this[ind] < arr[ind] ? -1 : 1;
    if (this.length != arr.length) {
        this.length < arr.length ? -1 : 1;
    return 0;
console.log(['a', 'b', 'c'].compareLexicographically(['a', 'b', 'c']));
console.log(['a', 'b', 'c'].compareLexicographically(['a', 'c', 'b']));
console.log(['a', 'c', 'b'].compareLexicographically(['a', 'b', 'c']));