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A comment on Types will be part of Ruby 3 stdlib source. Parent comment

Re:Types will be part of Ruby 3 stdlib source by Faark on Friday April 19, 2019 @08:24AM (#19698963)
> There's nothing lost by putting the sig in a companion file and leaving it to your editor/IDE to provide a popup.

I don't want to go back to having to keep C header file in sync. Your IDE can hide that information from your as well, if you don't want to see it all the time.

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Re:Types will be part of Ruby 3 stdlib source by mcintyre1994 on Friday April 19, 2019 @10:25AM (#19699870)
It's been a while since I wrote Ocaml, but IIRC the compiler yells at you if your mli files are out-of-date, for whatever that's worth. So keeping them synced isn't really an issue.
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