This basically means "Give me an array of letters from sorted input array's first item" ;)

Short and sweet!

You need to wrap those values with brackets [], because what you posted isn't an array. Using "3 dots" on a string returns an array of characters.

See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Spread_syntax

i don't understand why the three dots (...), return us an array and not something like this :
"paolo","zarate","azorsa","daniel".
i replaced the ...s with those values: "paolo","zarate","azorsa","daniel", to see what is going on, but i gives me an error.

Thank you.

I like how short and clean this is, without being too obnoxious.

Good one.

Hello,

What would be the difference between (/ /g, "") and (/\s/g, "")? Are they the exact same? Which one is best practice?

Best,
Maurizio A.

It's shorter. You can only use arrow functions to anonymous functions. When you use arrow f. you don't have to put "{}" or "return", bcs there's no need to do so. :P

Is there a case for putting the arrow function in a variable over writing a 'normal' function? Is it more 'modern' to use arrow functions? I really like this solution.

No problem, I revisited my first solution and it mutated the input too ;). Refactored it to make it pure now.

Lol you just edited your comment as the time I write the reply ^^

In French we say "Les grands esprits se rencontrent".