Discussion on: How not to sort an array in JavaScript

[Olzhas Askar]

I think the biggest disadvantage of sort() is that it sorts in place.
You need to do some relatively ugly hacks like spreading:

[...array].sort().map(console.log)

in order to use the power of FP.

[Phil Nash]

Yeah, it is a shame that it acts in place as we move to code that attempts to reduce the number of side effects. At least we can work around it, the problem is just remembering to.

[zhuangya]

it returns an array of undefineds :/

[damon]

That's because the console.log returns undefined, and it's being used in the call to .map().

var array = [9, 2, 3, 8, 1, 0]
var orderedArray = [...array].sort()

console.log(array)
// [9, 2, 3, 8, 1, 0]
console.log(orderedArray)
// [0, 1, 2, 3, 8, 9]

var logReturn = console.log("hello world")
// hello world
console.log(logReturn)
// undefined

[zhuangya]

exactly, my point is we should not use map here at all.