Nodejs Array Shuffle shuffle()

Method Source Code

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

Related

1. shuffle()

   Array.prototype.shuffle = function () {
     return this.sort((a, b) => Math.random() > 0.5 ? 1 : -1)
   

2. shuffle()

   Array.prototype.shuffle = function() {
       var a = this;
       var j, x, i;
       for (i = a.length; i; i -= 1) {
           j = Math.floor(Math.random() * i);
           x = a[i - 1];
           a[i - 1] = a[j];
           a[j] = x;
       return a;
   };
   

3. shuffle()

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

4. shuffle()

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

5. shuffle()

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

6. shuffle()

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

7. shuffle()

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

8. shuffle()

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

9. shuffle()

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