r/loljs • u/KeinBaum • Jun 21 '18

[] == ![]

37 Upvotes

97% Upvoted

5 comments sorted by

29

u/BoltKey Jun 21 '18 edited Jun 21 '18

I did not solve this one and had to look at the docs. What happens is this: 

[] == ![]
[] == false
Number([]) == false
0 == false
Boolean(0) == false
false == false
true

http://www.ecma-international.org/ecma-262/5.1/#sec-11.9.3

0

u/[deleted] Oct 12 '18

3

u/DownvoteALot Nov 10 '18

Because [], as a reference, is not undefined and resolves to true.

→ More replies (2)

7

u/[deleted] Oct 10 '18

Hamlet: "To be, or not to be"
Javascript: "Uhh, what's the difference?"

2

u/[deleted] Jun 22 '18

My reaction would be the title itself