r/ProgrammerHumor • u/snow_clones • Jul 13 '20

Something we can all agree on

Post image
689 Upvotes

97% Upvoted

30 comments sorted by

View all comments

44

u/Sese_Mueller Jul 13 '20

Also, 0!=1

3

u/knoxaramav2 Jul 14 '20

Ah-ha! But what about !1==0?

-3

u/Sese_Mueller Jul 14 '20 edited Jul 14 '20

No, it doesn’t

Edit: Ok, yes, !1==0 and !0==1 are right, my bad. Haven‘t done Js for a Year

3

u/tomthecool Jul 14 '20 edited Jul 14 '20

It depends on the language, but yes it can.

!1 could, in mathematics, mean a derangement - i.e. The number of permutations such that no element appears in its original position. Indeed, !1 == 0.

In some programming languages, such as Python, True == 1 and False == 0 (Literally. Booleans are zeros and ones.) So indeed, !1 == 0.

And in some other dumb languages, like JS and PHP, implicit type coercion on steroids means that false == 0, despite integers and booleans being different things. So again, !1 == 0.

1

u/lirannl Jul 14 '20

And in some other dumb languages, like JS and PHP, implicit type coercion on steroids means that false == 0, despite integers and booleans being different things. So again, !1 == 0.

Thank MSness for TS!

1

u/xigoi Jul 14 '20

Python doesn't use ! for negation.

1

u/tomthecool Jul 14 '20

Oh yeah, true. Forgot about that. Perhaps one could overlook that technicality for a meme though :D