Clever but difficult to read.

no, it returns with commas

But this solution return number without "," (commas)

sir how wide is your monitor? xD

interesting

built-in human code minimizer

'>]|[<'

it's a global variable, declared on the fly (which is very bad practice, but hey, this is code golfing ;) ). To read as ...(s=v+'')

I'm still new to this, so sorry if this sounds dumb, isn't '...s' using an undefined variable 's'? If it's not then what is '...s' doing?

explain to anyone who is not lazy

Why would it be slower? Not that performance matters when you are doing code golf.

It will shave a few bytes but on the other hand the time of execution will be longer

You can omit the ; and replace && with & to shave a few bytes

yummy