Nodejs Array Shuffle shuffle()

Method Source Code

Array.prototype.shuffle = function() {
    var i = this.length, j, tempi, tempj;
    if ( i == 0 ) return this;
    while ( --i ) {
        j       = Math.floor( Math.random() * ( i + 1 ) );
        tempi   = this[i];// w  w  w . j  av  a  2 s.c  o m
        tempj   = this[j];
        this[i] = tempj;
        this[j] = tempi;
    }
    return this;
}

Related

1. shuffle()

   Array.prototype.shuffle = function() {
     var i = this.length, j, tempi, tempj;
     if ( i == 0 ) return false;
     while ( --i ) {
        j       = Math.floor( Math.random() * ( i + 1 ) );
        tempi   = this[i];
        tempj   = this[j];
        this[i] = tempj;
        this[j] = tempi;
   ...
   

2. shuffle()

   Array.prototype.shuffle = function() {
     var i = this.length, j, tempi, tempj;
     if ( i === 0 ) return false;
     while ( --i ) {
        j       = Math.floor( Math.random() * ( i + 1 ) );
        tempi   = this[i];
        tempj   = this[j];
        this[i] = tempj;
        this[j] = tempi;
   ...
   

3. shuffle()

   Array.prototype.shuffle = function () {
       var i, swap, ind;
       for (i = this.length - 1; i > 0; --i) {
           ind = parseInt(Math.random() * i);
           swap = this[i];
           this[i] = this[ind];
           this[ind] = swap;
       return this;
   ...
   

4. shuffle()

   Array.prototype.shuffle = function () {
     var rand, value, i;
     if (!this || this.length === 0) { return this; }
     for (i = 0; i < this.length; i++) {
       rand        = Math.floor(Math.random() * i);
       value       = this[i];
       this[i]     = this[rand];
       this[rand]  = value;
     return this;
   };
   

5. shuffle()

   Array.prototype.shuffle = function() {
       for (i = this.length - 1; i > 0; i--) {
           var temp = this[i];
           var random = Math.floor(Math.random() * (i + 1));
           this[i] = this[random];
           this[random] = temp;
       return this;
   };
   ...
   

6. shuffle()

   Array.prototype.shuffle = function () {
       for (var j, x, i = this.length; i; j = Math.floor(Math.random() * i), x = this[--i], this[i] = this[j], this[j] = x);
       return this;
   };
   

7. shuffle()

   Array.prototype.shuffle = function() {
     let input = this;
     for (let i = input.length - 1; i >= 0; i--) {
       let randomIndex = Math.floor(Math.random() * (i + 1));
       let itemAtIndex = input[randomIndex];
       input[randomIndex] = input[i];
       input[i] = itemAtIndex;
     return input;
   ...
   

8. shuffle()

   Array.prototype.shuffle =  function() {
     var i, j, t;
     for (i = 1; i < this.length; i++) {
       j = Math.floor(Math.random()*(1+i));  
       if (j != i) {
         t = this[i];                        
         this[i] = this[j];
         this[j] = t;
   

9. shuffle()

   Array.prototype.shuffle = function() {
     var i = this.length, j, temp;
     while(--i > 0) {
       j = Math.floor(Math.random() * (i+1));
       temp = this[j];
       this[j] = this[i];
       this[i] = temp;
     return this;
   ...