Question

What is the shortest expression I can use to return false for all numbers < 0 and the number itself for all numbers >= 0?

Left is what I have, right is want I want to be returned.

-3: false
-1: false
 0:  0
 1:  1
23: 23

Something really short like:

(!!number)   <-- (doenst work)

Answer 1

If you want something shorter, you could do:

return number >= 0 && number;

If number >= 0 is false, then && will evaluate to the left operand (i.e. false). Otheriwse, it evaluates to the right operand (i.e. the number).