traches comments on 0 vs null vs undefined - explained with toilet paper

0 vs null vs undefined - explained with toilet paper (i.stack.imgur.com)

submitted 3 years ago by jeff@programming.dev to c/programmer_humor@programming.dev

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[–] traches@sh.itjust.works 2 points 3 years ago (7 children)

Rust is neat because it doesn't have the bottom 2

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[–] deegeese@sopuli.xyz 2 points 3 years ago (6 children)

Lack of support for nulls sounds like a huge pain in the ass.

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[–] labsin@sh.itjust.works 5 points 3 years ago* (3 children)

It has std:option

So every object that can be None or Some, needs to be checked when used. And only options can be set to None

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[–] CanadaPlus@lemmy.sdf.org 5 points 3 years ago* (last edited 3 years ago) (2 children)

Yeah it's a bit inaccurate to say it's not supported. It just has edge case handling written explicitly into whatever thing you're building (I assume it's required to do so in order to be well-typed). It took this idea from Haskell, which might have gotten it from Miranda or something.

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[–] labsin@sh.itjust.works 2 points 3 years ago (1 child)

I like the pattern a lot more. It makes you just initialize the value and only keep it 'nullable' for where it's needed and then you need to check. Even .net implemented it (but a bit more awkward)

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[–] CanadaPlus@lemmy.sdf.org 1 point 3 years ago

Yup. Programmers are really stupid, if the compiler forces us to explicitly handle weird situations that's a feature.

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[–] traches@sh.itjust.works 3 points 3 years ago

It also doesn't have throw/try/catch. If a function can fail, it returns a Result and you have to deal with the failure case explicitly.

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[–] lavafroth@programming.dev 3 points 3 years ago

*Laughs in Option*

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