Nodejs Array Equal equals(array)

Method Source Code

Array.prototype.equals = function (array) {
   // if the other array is a falsy value, return
   if (!array)// ww  w  .  j  ava2 s .  c  o m
      return false;

   // compare lengths - can save a lot of time 
   if (this.length != array.length)
      return 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]))
            return false;
      }
      else if (this[i] != array[i]) { 
         // Warning - two different object instances will never be equal: {x:20} != {x:20}
         return false;
      }
   }
   return true;
}

Related

1. equals(array)

   Array.prototype.equals = function(array) {
     if (!array)
       return false;
     if (this.length !== array.length)
       return false;
     return this.every((x, i) => x === array[i]);
   };
   const a1 = [1,2,3];
   const a2 = [1,2,3];
   ...
   

2. equals(array)

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

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) {
   ...
   

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) {
               if (!this[i].equals(array[i])) {
                   return false;
           } else if (this[i] != array[i]) {
   ...
   

6. 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;       
   ...
   

7. 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;
   ...
   

8. 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;
   ...
   

9. 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;
   ...