Nodejs Array Reverse reverse(arr)

Method Source Code

(function() {//  www.ja v a  2 s  .  c o  m
'use strict'
//reverse an array of integers in place
let arr = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]

Array.prototype.reverse = Array.prototype.reverse || function(arr) {
    for(let i = 0; i < arr.length / 2; i++) {
        let opp =  arr.length - i - 1   
        arr[i] += arr[opp]
        arr[opp] = arr[i] - arr[opp]
        arr[i] -= arr[opp]
    }
}


arr.reverse()
arr.map((n) => console.log(n))
})()

Related

1. reverse()

   Array.prototype.reverse = function () {
     var counter, 
       temp, 
       index;
     counter = this.length;
       while (counter > 0) {
           index = Math.floor(Math.random() * counter);
           counter--;
           temp = this[counter];
   ...
   

2. reverse()

   Array.prototype.reverse = function () {
     var counter, 
       temp, 
       index;
     counter = this.length;
       while (counter > 0) {
           index = Math.floor(Math.random() * counter);
           counter--;
           temp = array[counter];
   ...
   

3. reverse()

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

4. 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;
   };
   var input = [1, 2, 3, 4];
   input.reverse(); 
   console.log(input); 
   

5. reverse()

   Array.prototype.reverse = function(){
     var a = this;
     for(var i =0;i<(a.length>>1);i++)
       this.swap(i,a.length-1-i);
   

6. reverse(fn)

   Array.prototype.reverse = function(fn) {
     for (var i = this.length - 1; i >= 0; i--) fn(this[i]);
   

7. reverse1()

   Array.prototype.reverse1 = function() {
       var arrLength = this.length;
       for(var i = arrLength-1; i>=0; i--){
           this.push(this[i]);
       this.splice(0,arrLength);
       return this;
   };
   console.log([3,2,1].reverse1());
   ...
   

8. reverseElements()

   "use strict";
   Array.prototype.reverseElements = function () {
       var temp = this.concat();
       var i = this.length - 1;
       var target = this.length - 1;
       while (i >= 0) {
           this[target - i] = temp[i];
           i--;
       return this;
   

9. reverseFromLToR(left,right)

   Array.prototype.reverseFromLToR = function(left,right){
       if(right >= this.length){
           return;
       while(left < right){
           var temp = this[left];
           this[left] = this[right];
           this[right] = temp;
           left++;
   ...