From: "Eregon (Benoit Daloze) via ruby-core" Date: 2024-10-01T18:18:49+00:00 Subject: [ruby-core:119387] [Ruby master Feature#20770] A *new* pipe operator proposal Issue #20770 has been updated by Eregon (Benoit Daloze). One concern with so many `then {}` is that's a non-trivial overhead for execution (2 method calls + 1 block call for `then { foo(it) }` vs 1 method call for `foo(var)`). So if it's added I think it should translate to the same as using local variables and not `then {}` blocks. I would write that snippet like this: ```ruby json = Net::HTTP.get(URI.parse(client_api_url)) JSON.parse(json).fetch(important_key) ``` 2 lines of code vs 4, and IMO just as readable if not better. So in my opinion there is no need for a pipeline operator for this. Also I would think in real code one would probably want to `rescue` some exceptions there, and so the pipeline wouldn't gain much visually and might need to be broken down in several parts anyway. ---------------------------------------- Feature #20770: A *new* pipe operator proposal https://bugs.ruby-lang.org/issues/20770#change-110004 * Author: AlexandreMagro (Alexandre Magro) * Status: Open ---------------------------------------- Hello, This is my first contribution here. I have seen previous discussions around introducing a pipe operator, but it seems the community didn't reach a consensus. I would like to revisit this idea with a simpler approach, more of a syntactic sugar that aligns with how other languages implement the pipe operator, but without making significant changes to Ruby's syntax. Currently, we often write code like this: ```ruby value = half(square(add(value, 3))) ``` We can achieve the same result using the `then` method: ```ruby value = value.then { add(_1, 3) }.then { square(_1) }.then { half(_1) } ``` While `then` helps with readability, we can simplify it further using the proposed pipe operator: ```ruby value = add(value, 3) |> square(_1) |> half(_1) ``` Moreover, with the upcoming `it` feature in Ruby 3.4 (#18980), the code could look even cleaner: ```ruby value = add(value, 3) |> square(it) |> half(it) ``` This proposal uses the anonymous block argument `(_1)`, and with `it`, it simplifies the code without introducing complex syntax changes. It would allow us to achieve the same results as in other languages that support pipe operators, but in a way that feels natural to Ruby, using existing constructs like `then` underneath. I believe this operator would enhance code readability and maintainability, especially in cases where multiple operations are chained together. Thank you for considering this proposal! -- https://bugs.ruby-lang.org/ ______________________________________________ ruby-core mailing list -- ruby-core@ml.ruby-lang.org To unsubscribe send an email to ruby-core-leave@ml.ruby-lang.org ruby-core info -- https://ml.ruby-lang.org/mailman3/lists/ruby-core.ml.ruby-lang.org/