Javascript : Shuffle or randomize array example



Tags : javascript randomize shuffle

Problem :

You have an array and you want to shuffle the items in the array. How to do that in Javascript?

Solution :

Use Math.random() function to randomize the swapping process and the end result will be a shuffled/randomized array.

 function shuffle(input){
 for(
 var j, x, i = input.length; i; 
 j = Math.floor(Math.random() * i),
 x = input[--i],
 input[i] = input[j],
 input[j] = x
 );
 return input;
 };

 var intArray = ['0','1','2','3','4','5','6','7','8','9'];
 shuffle(intArray);

 console.log(intArray);

 var strArray = ['abc','def','ghi','jkl','mno'];
 shuffle(strArray);

 console.log(strArray);

To see the output, use the browser's console viewer.

http://jsfiddle.net/7Lxhzunk/



Tags : javascript randomize shuffle

By Adam Ng

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