Was Y Combinator worth it?

Re:Was Y Combinator worth it? by PheonixPharts on Thursday August 10, 2023 @08:57PM (#37083807)

Funnily enough you can't actually implement the proper y-combinator in Haskell because the type system won't allow it. Which is a real shame because in most Lisps you can only implement the applicative order y-combinator due to a lack of lazy evaluation.

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Re:Was Y Combinator worth it? by hackyhacky on Thursday August 10, 2023 @11:20PM (#37084742)

What is "improper" about this implementation in Haskel?

  fix :: (a -> a) -> a
  fix f = let x = f x in x

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Re:Was Y Combinator worth it? by lambdas on Friday August 11, 2023 @05:39AM (#37086800)

The y combinator is used to implement recursion in a language without recursion no?

That definition is dependent on recursion already being present.

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