Nodejs Utililty Methods Array Equal

function toRadians(degrees) { return degrees * (Math.PI / 180);}
function toDegrees(radians) { return radians * (180 / Math.PI);}
Array.prototype.equals = function (array) {
    if (!array) { return false; }
    else if (this.length != array.length) { return false; }
    for (var i = 0, l = this.length; i < l; i++) {
        if (this[i] instanceof Array && array[i] instanceof Array) {
            if (!this[i].equals(array[i])) { return false; }
        else if (this[i] != array[i]) { return false; }
    return true;
};

Array.prototype.equals = function(array) {
  var answer = this.every(function(element, index) {
    return element === array[index];
  });
  if (answer) {
    return answer;
  } else {
    return 'Not equal!\n' + 'Expected: [' + array + ']\n' + 'Got: [' + this + ']';
function merge(array1, array2) {
  var copy1 = array1.slice();
  var copy2 = array2.slice();
  var merged = [];
  while (copy1[0] || copy2[0]) {
    if (copy1[0] < copy2[0] || typeof copy2[0] === 'undefined') {
      merged.push(copy1.shift());
    } else {
      merged.push(copy2.shift());
  return merged;
console.log(merge([1, 5, 9], [2, 6, 8]).equals([1, 2, 5, 6, 8, 9]));
console.log(merge([1, 1, 3], [2, 2]).equals([1, 1, 2, 2, 3]));
console.log(merge([], [1, 4, 5]).equals([1, 4, 5]));
console.log(merge([1, 4, 5], []).equals([1, 4, 5]));

Array.prototype.equals = function (array) {
    if (!array)
        return false;
    if (this.length != array.length)
        return false;
    for (var i = 0, l=this.length; i < l; i++) {
        if (this[i] instanceof Array && array[i] instanceof Array) {
            if (!this[i].equals(array[i]))
                return false;
...

Array.prototype.equals = function(array) {
  var answer = this.every(function(element, index) {
    return element === array[index];
  });
  if (answer) {
    return answer;
  } else {
    return 'Not equal!\n' + 'Expected: [' + array + ']\n' + 'Got: [' + this + ']';
function assertEqual(value, expected) {
  if (Array.isArray(value) && Array.isArray(value)) {
    if (value.equals(expected)) {
      console.log("Passed");
    } else {
      console.log("Failed");
      console.log("Got: ", value);
      console.log("Expected: ", expected);
  } else {
    if (value === expected) {
      console.log("Passed");
    } else {
      console.log("Failed");
      console.log("Got: ", value);
      console.log("Expected: ", expected);
module.exports = { assertEqual };

Array.prototype.equals = function (array) {
  if (!array)
    return false;
  if (this.length != array.length)
    return false;
  for(var i = 0, l = this.length; i < l; i++) {
    if (this[i] instanceof Array && array[i] instanceof Array){
      if (!this[i].equals(array[i]))
      return false;
...

Array.prototype.equals = function (array)
    if (!array)
        return false;
    if (this.length != array.length)
        return false;
...

Array.prototype.equals = function(array){
    if(!array){
        return false;
    if(this.length != array.length){
        return false;
    for (let i = 0; i < this.length; i++){
        if(this[i] != array[i]){
...

if(Array.prototype.equals)
    console.warn("Overriding existing Array.prototype.equals. Possible causes: New API defines the method, there's a framework conflict or you've got double inclusions in your code.");
Array.prototype.equals = function (array) {
    if (!array)
        return false;
    if (this.length != array.length)
        return false;
    for (var i = 0, l=this.length; i < l; i++) {
        if (this[i] instanceof Array && array[i] instanceof Array) {
...

function toRadians(degrees) { return degrees * (Math.PI / 180);}
function toDegrees(radians) { return radians * (180 / Math.PI);}
Array.prototype.equals = function (array) {
    if (!array) { return false; }
    else if (this.length != array.length) { return false; }
    for (var i = 0, l = this.length; i < l; i++) {
        if (this[i] instanceof Array && array[i] instanceof Array) {
            if (!this[i].equals(array[i])) { return false; }
        else if (this[i] != array[i]) { return false; }
    return true;
};
function unitVector(vector) {
    return vector.map(function(v) { return parseFloat(v)/norm(vector); });
function norm(vector) {
    return Math.sqrt(vector.map(
        function(v) { return v*v; }).reduce(
            function(a, b) { return a + b; }));
function angleOf(vector) { return Math.atan(vector[1]/vector[0]); }

Array.prototype.equals = function(array) { 
    if (!array)
        return false;
    if (this.length !== array.length)
        return false;
    for (var i = 0, l = this.length; i < l; i++) {
        if (this[i] instanceof Array && array[i] instanceof Array) {
            if (!this[i].equals(array[i]))
                return false;
...