Nodejs Array Random randomElement()

Method Source Code

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

function shuffle(array) {
  var currentIndex = array.length, temporaryValue, randomIndex ;

  // While there remain elements to shuffle...
  while (0 !== currentIndex) {

    // Pick a remaining element...
    randomIndex = Math.floor(Math.random() * currentIndex);
    currentIndex -= 1;/*from   ww  w  .  j av a2 s  . c  o m*/

    // And swap it with the current element.
    temporaryValue = array[currentIndex];
    array[currentIndex] = array[randomIndex];
    array[randomIndex] = temporaryValue;
  }

  return array;
};

function getRandomInt(min, max) {
    return Math.floor(Math.random() * (max - min + 1)) + min;
}

Related

1. 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];
   

2. 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;
   ...
   

3. 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;
   

4. randomElement()

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

5. randomElement()

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

6. randomPick()

   Array.prototype.randomPick = function () {
       return this[_.random(this.length - 1)];
   };
   

7. randomPick()

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

8. randomPick()

   Array.prototype.randomPick = function() {
     var index = Math.floor(Math.random() * this.length);
     return this[index];
   

9. randomRemove()

   Array.prototype.randomRemove = function () {
     return this.splice(Math.floor(Math.random() * this.length), 1)[0];