Nodejs Array Random random()

Method Source Code

Array.prototype.random = function() {
  if (this.length == 0) return void 0;
  return this[Math.floor(Math.random() * this.length)];
};

Related

1. random()

   Array.prototype.random = function () {
     var i, j, k, ti, tj;
     for (k = 0; k < this.length; k++) {
       i = this.length;
       while (--i) {
         j = Math.floor(Math.random() * (i - 1));
         ti = this[i];
         tj = this[j];
         this[j] = ti;
   ...
   

2. random()

   window.console = window.console || {'log':function(){}}
   function randomInt(min, max) {
     return Math.floor(Math.random() * (max - min + 1)) + min;
   Array.prototype.random = function () {
     return this[Math.random() * this.length - 1 | 0];
   };
   Array.prototype.subRandom = function () {
     var length = randomInt(0, this.length)
   ...
   

3. random()

   Array.prototype.random = function() {
     return this[Math.floor(Math.random() * this.length)];
   Number.prototype.toPrice = function() {
     return this.valueOf().toFixed(2).replace(/./g, function(c, i, a) {
       return i && c !== "." && !((a.length - i) % 3) ? "," + c : c;
     });
   

4. random()

   Array.prototype.random = function(){
     return this[Math.round(Math.random()*(this.length-1))]
   

5. random()

   Array.prototype.random = function()
     return this[Random(0, this.length - 1)];
   

6. random(i)

   Array.prototype.random = function(i) {
       var random = [];
       for(; i > 0;) {
           random.push(this[Math.random() * this.length | 0]);
           i--;
       return random;
   };
   var usedNames = {};
   ...
   

7. random(last)

   Array.prototype.random = function(last) {
       var num = 0;
       do {
          num = Math.floor(Math.random() * this.length);
       } while (this[num] == last);
       return this[num];
   

8. random(nelm)

   Array.prototype.random = function(nelm) {
     nelm = nelm || 1;
     if (nelm <= 0) {
       nelm = 1;
     if (nelm === 1) {
       return this[Math.floor(Math.random() * this.length)];
     var ret = [], i;
   ...
   

9. random(num, enableDuplicate)

   Array.prototype.random = function(num, enableDuplicate){
     var array = [];
     var duplicate;
     if(typeof duplicate === "undefined"){
       duplicate = false;
     else{
       duplicate = enableDuplicate;
     if(num <= this.length){
       var index;
       for(var i=0; i<num; i++){
         index = Math.floor(Math.random()*this.length);
         array.push(this[index]); 
         if(!enableDuplicate){
           this.splice(index, 1);
       return array;
   module.exports = Array;