gicontz/Index-Shuffler

Return an array of integers as shuffled starting from 0, to be used as indexes as an alternative of Collections.shuffle() which is not supported by JS

Index-Shuffler

Installation

1. Download or Clone this repository
2. Import the js file to your site

<script src="indexShuffler.js"></script>	

How to Use?

The method:

function generateShuffleIndexes(numberOfIndexes){
	var randomIndexes = new Array();

//Initialize the first value of the array
randomIndexes[0] = Math.floor((Math.random() * numberOfIndexes));

....
}

function ShuffleArray(array){
	var shuffleIndexes = generateShuffleIndexes(array.length);	
	var shuffledArray = new Array();
	for(var i = 0; i <= array.length - 1; i++){
		shuffledArray[i] = array[shuffleIndexes[i]];
	}
	return shuffledArray;
}

Implementation:

If you only want to gain shuffled indexes

console.log(generateShuffleIndexes(20));

Possible Output:

0:2
1:15
2:17
3:6
4:1
5:10
6:9
7:11
8:13
9:19
10:18
11:14
12:4
13:5
14:12
15:16
16:8
17:7
18:0
19:3

If you want to output the shuffled array

var myArray = ["Array1", "Array2", "Array3", "Array4", "Array5"];
console.log(ShuffleArray(myArray));

Possible Output:

0:"Array2"
1:"Array1"
2:"Array4"
3:"Array5"
4:"Array3"

Check this DEMO

Return an array of integers as shuffled starting from 0, to be used as indexes as an alternative of Collections.shuffle() which is not supported by JS