Science Memes

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if statement == false (i.imgflip.com)

submitted 2 weeks ago by [email protected] to c/[email protected]

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[–] [email protected] 18 points 2 weeks ago (1 children)

The "only" part implies exclusivity, which may be false, because other things might run the code anyway.

IF "I can see the sun" THEN "It's day."

Nothing wrong about that. However if we make it exclusive:

IF AND ONLY IF "I can see the sun" THEN "It's day."

That's obviously wrong. I can actually not keep the day away by sitting with closed eyes in my mothers basement with the curtains shut.

"Only if" might make sense in a legal contract, but there's no way a piece of code can stop other pieces of code from calling the same functions.

[–] [email protected] 2 points 2 weeks ago (1 children)

But that’s not how if statements in code work. So what you’ve said isn’t wrong, but the premise of this meme is completely off

[–] [email protected] 2 points 2 weeks ago* (last edited 2 weeks ago)

Yes sure. Code is logical stepwise. By including the "only if" it implies that other stuff is taken into account, which it isn't at that moment in code.

I mean, I don't need to extend the implications of an IF statement. It already does exactly what it says.

Anyway fuzzy logic does exist for people who want "sometimes if". It's useful in certain cases. I've only ever considered it in music production, where things very often get to the point of complexity where it makes a (sometimes) useful difference.