Most efficient array shuffler

Question

How can I shuffle an array\'s values in the most efficient manner possible?

Each element is just a string containing HTML.

Answer 1

Let me post my own answer just to encourage you NOT TO use random sort() method as it will produce not so random output.

As being said, Fisher-Yates shuffle is the most efficient algorithm for that purpose, and it can be easily implemented with the following ES6 code:

const src = [...'abcdefg'],

      shuffle = arr => arr.reduceRight((r,_,__,s) => 
        (r.push(s.splice(0|Math.random()*s.length,1)[0]), r),[])

console.log(JSON.stringify(shuffle(src)))

.as-console-wrapper {min-height:100%}