Nodejs Array Equal equals(array)

Method Source Code

Array.prototype.equals = function (array) {
    // if the other array is a falsy value, return
    var toReturn = true;
    if (!array)/*  ww  w.  j  a  v  a 2  s.  c  om*/
        toReturn = false;

    // compare first lengths since can save a lot of time 
    if (this.length != array.length)
        toReturn =  false;

    for (var i = 0, l=this.length; i < l; i++) {
        // Check if we have nested arrays
        if (this[i] instanceof Array && array[i] instanceof Array) {
            // recurse into the nested arrays
            if (!this[i].equals(array[i]))
                toReturn =  false;       
        }           
        else if (this[i] != array[i]) { 
            // Warning - two different object instances will never be equal: {x:20} != {x:20}
            toReturn =  false;   
        }           
    }       
    return toReturn;
}

Related

1. equals(array)

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

2. equals(array)

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

3. equals(array)

   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;
   ...
   

4. equals(array)

   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].compare(array[i]))
                   return false;
   ...
   

5. equals(array)

   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) {
   ...
   

6. equals(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;
   };
   

7. equals(array)

   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]));
   

8. equals(array)

   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;
   ...
   

9. equals(array)

   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 };