Nodejs Array Reverse reverse()

Method Source Code

Array.prototype.reverse = function() {
   for (var i = 0, j = this.length - 1; i < j; i++, j--) {
      var tmp = this[i];
      this[i] = this[j];/*from   www.j ava  2 s.c o  m*/
      this[j] = tmp;
   }
   
   return this;
};

Related

1. reverse()

   Array.prototype.reverse = function() {
     var array = this.concat();    
     for(var i = 0; i<this.length; i++){
        this[i] = array.pop();      
     }; 
     return this;
   };
   console.log([1,2,3].reverse());
   

2. reverse()

   Array.prototype.reverse = function() {
       for (var i=0; i<this.length/2; i++) {
           var temp = this[i];
           this[i] = this[this.length-1-i];
           this[this.length-1-i] = temp;
       return this;
   };
   console.log([1,2,3,4].reverse());
   ...
   

3. reverse()

   Array.prototype.reverse = function() {
       var array = [];
       var length = this.length;
       for (var i = length - 1; i >= 0; i--){
           array.push(this[i])
       };
       for ( var i = 0; i < length; i ++){
           this[i] = array[i];
       return this;
   };
   

4. reverse()

   Array.prototype.reverse = function() {
       for (i=0, j= this.length-1; i<j; i++, j--){
           var tmp = this[i];
           this[i]=this[j];
           this[j]=tmp;
       return this;
   };