Solving Reverse String in Javascript with ES6

Lately, I’ve been doing some coding challenge and I saw this problem. This is fairly easy challenge and the common solution to this is something like this

function reverse(s){
    return s.split("").reverse().join("");
}

or with ES6 using reduce function

function reverse(s) {

    return s.split('').reduce((reversedString, nextCharacter) => 
        nextCharacter + reversedString
    , '');
}

Easy peasy.

After answering this problem, I started searching on Stackoverflow because I’m on curious how others solved this problem.

Then I saw this, https://stackoverflow.com/questions/958908/how-do-you-reverse-a-string-in-place-in-javascript#answer-16776621

It makes my solution and others wrong because of this unicode problem.

So basically if I used my function with this string

reverse('foo 𝌆 bar mañana mañana');

The output will be

With a slight change on my ES6 solution, we can fix this problem by using spread operator because this operator is unicode-aware.

My new solution is now like this

function reverse(s) {
    return [...s].reduce((reversedString, nextCharacter) => 
        nextCharacter + reversedString
    , '');
}

More info:

https://mathiasbynens.be/notes/javascript-unicode