Nodejs Array Sample sample()

Method Source Code

/*/*  w  ww  .  j a v  a  2s .c  o  m*/
Testing Object Oriented Programming by making two
ducks talk.
*/

// The prototype below allows a random element to be selected
// from an array:

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

// Here is the Duck object:

function Duck(color){
  this.type = color;
  this.quack = function() {
    console.log(["Quacksicles!","Quacktacular!","That's so QUACK!"].sample());
  };
}

// Creating the Two Ducks:

var redDuck = new Duck("red");
var yellowDuck = new Duck("yellow");

console.log("The " + redDuck.type + " duck says: ");
redDuck.quack();

console.log("The " + yellowDuck.type + " duck says: ");
yellowDuck.quack();

Related

1. sample()

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

2. sample()

   Array.prototype.sample = function() {
     var rand_position = parseInt(Math.random() * this.length);
     return this[rand_position];
   };
   

3. sample()

   Array.prototype.sample = function() {
       function getRandomInt(min, max) {
           return Math.floor(Math.random() * (max - min)) + min;
       return this[getRandomInt(0, this.length)];
   

4. sample(n)

   Array.prototype.sample = function(n) {
     const result = [...this];
     const count = Math.min(n, result.length);
     for (let i = 0 ; i < count ; i++) {
       const x = Math.floor(Math.random() * result.length);
       [result[i], result[x]] = [result[x], result[i]];
     return result.slice(0, count);
   const generate = () =>
     Array(45).fill()
              .map((_, i) => i + 1)
              .sample(6)
              .sort((x, y) => x - y)
              .join(', ');
   console.log(generate());
   

5. sample(n)

   "use strict";
   Array.prototype.sample = function (n) {
     var randNum, dupe, result;
     if (arguments.length === 0) {
       result = this[Math.floor(Math.random()*this.length)];
     } else if (parseInt(n) !== n) {
       throw TypeError("argument must be a number");
     } else if (n <= 0) {
       throw RangeError("argument must greater than zero");
   ...
   

6. sample(n)

   Array.prototype.sample = function(n) {
     const result = this.slice();
     const count = Math.min(n, result.length);
     for (let i = 0 ; i < count ; i++) {
       const x = Math.floor(Math.random() * result.length);
       const temp = result[i];
       result[i] = result[x];
       result[x] = temp;
     return result.slice(0, count);