alt Hacker NewsI like significant invitation, but I still wouldn’t choose it if I was designing a language today.
Functional-style programming has become much more popular since Python was designed in the 1990s, and there doesn’t seem to be a good way to have Python-like significant indentation and also support true anonymous functions.
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As I understand it, Mojo’s goal is to be able to match state of the art performance for parallel algorithms and be able to use the exotic GPU hardware. A functional style is not necessarily productive in that context.
One interesting PL concept they implement are linear types https://mojolang.org/docs/std/traits/anytype/AnyType/
Haskell has significant indentation and anonymous functions.
Scala 3, F#, CoffeeScript, Nim, Haskell, Elm, PureScript...
True anonymous functions has nothing to do with indentation, ML derived languages are also indentation based.
Guido doesn't want them in the language, as simple as that.