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Logs: liberachat/#haskell

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2025-08-16 09:45:34 <jreicher> ackthet: I'm not sure whether a math background helps, but emphasis on "not sure". A logic background certainly helps, as a type system is logistic, and a math background might help in the relationship between recurrence relations and recursion, but functional programming is declarative, and I'm not sure if even maths gives you a background in that.
2025-08-16 09:46:36 trickard_ is now known as trickard
2025-08-16 09:47:44 <ackthet> jreicher: i think certain types of math do, but not the types I was exposed to
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2025-08-16 09:48:24 <ackthet> i'm the least worried about the type system. that make a lot of sense on pervious attempts, and it was my favorite thing about the lang
2025-08-16 09:48:58 <jreicher> I recall you mentioning a background in physics, so I'm guessing you have calculus, PDEs, vector calculus, and tensors.
2025-08-16 09:50:31 <ackthet> yep. i also got a 2nd BS in math so I've done real analysis, proofs, modern algebra etc
2025-08-16 09:51:15 <davros1> haskellbridge, thanks
2025-08-16 09:51:33 <yin> what's the most idiomatic way of having something like `on compare length [0..9] [0..]` return LT instead of hanging?
2025-08-16 09:58:30 <Leary> Maths is very declarative, in very much the same way as Haskell. Typical mathematical function definitions (perhaps using induction) translate very directly to Haskell implementation (perhaps with recursion).
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2025-08-16 10:00:24 <Leary> yin: I don't know about idiomatic, but I like `compare (void xs) (void ys)`.
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2025-08-16 10:05:22 <yin> Leary: that's not bad at all! thanks
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2025-08-16 10:06:03 <yin> am I misunderstanding or is https://hackage-content.haskell.org/package/ghc-bignum-1.3/docs/src/GHC.Num.Natural.html#Natural not a type-level nat at all?
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2025-08-16 10:08:33 <yin> because GHC.TypeNats.Nat is just a synonym to that
2025-08-16 10:10:24 <jreicher> Leary: It depends what you mean by "maths". In personal opinion maths is proof, and that's not declarative.
2025-08-16 10:13:25 <Leary> Maths proceeds though rigourous deduction, yes, but in the process of doing so a great number definitions are declared.
2025-08-16 10:14:20 <Leary> You can further argue that the proofs are declarative too, if you want to go Curry-Howard.
2025-08-16 10:18:41 <Leary> yin: DataKinds is in effect, lifting the `Natural` type of value-level nats to the `Natural` kind of type-level nats.
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2025-08-16 10:36:58 <yin> Leary: i was under the impression there was a Peano Nats module somewhere. that's what i was searching for
2025-08-16 10:40:05 <Leary> Not that I'm aware of. In fact, even outside of 'base', I only see people roll their own.
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2025-08-16 11:16:13 <yin> fair enough
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