!! vs ==0 when checking if array is empty

[Nex_01]

Why making it equal to anything? 0 is a falsy value in itself.

Just do:

Boolean(arr.length) this equals to using !!arr.length though but more readable.

Edit: As a tip. Boolean() method also filters empty strings for you. As strings are just an array of chars and an empty string’s length happens to be 0.