Nodejs Array Random random(nelm)

Method Source Code

Array.prototype.random = function(nelm) {
  nelm = nelm || 1;//from   ww  w . j a v a 2s .  c o  m
  if (nelm <= 0) {
    nelm = 1;
  }
  if (nelm === 1) {
    return this[Math.floor(Math.random() * this.length)];
  }
  var ret = [], i;
  for (i = 0; i < nelm; i++) {
    ret.push(this[Math.floor(Math.random() * this.length)]);
  }
  return ret;
};

Related

1. random()

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

2. random()

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

3. random()

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

4. 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 = {};
   ...
   

5. 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];
   

6. 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;
   

7. randomElement()

   Array.prototype.randomElement = function () {
       return this[Math.floor(Math.random() * this.length)]
   

8. randomElement()

   function Weather() {
     this.currentWeather = ['stormy', 'sunny', 'sunny', 'sunny'].randomElement();
   Array.prototype.randomElement = function () {
     return this[Math.floor(Math.random() * this.length)];
   };
   

9. randomElement()

   Array.prototype.randomElement = function () {
       return this[Math.floor(Math.random() * this.length)]
   };
   function shuffle(array) {
     var currentIndex = array.length, temporaryValue, randomIndex ;
     while (0 !== currentIndex) {
       randomIndex = Math.floor(Math.random() * currentIndex);
       currentIndex -= 1;
       temporaryValue = array[currentIndex];
   ...