Thanks for the proposal! Unfortunately that would make us unable to inspect functions themselves, which is a valid argument to IO.inspect after all.
Imagine the confusion of trying to inspect a pipeline that may emit an anonymous function only to find it is being executed instead. *José Valimwww.plataformatec.com.br <http://www.plataformatec.com.br/>Founder and Director of R&D* On Fri, Jan 12, 2018 at 10:59 PM, <[email protected]> wrote: > I often find myself wanting to inspect things in the middle of a chain of > pipes, but I don’t always want to inspect the return values as-is. > Sometimes I want to inspect sub-attributes or call functions on the return > values to inspect them. > > For example, imagine the contrived pipeline below. > > ["thing1", "thing2"] > |> generate_more_things() > |> do_something_with_things() > > If I want to know the length of the list returned by > generate_more_things/1, I would do this: > > ["thing1", "thing2"] > |> generate_more_things() > |> (fn things -> > things |> length() |> IO.inspect() > things > end).() > |> do_something_with_things() > > If IO.inspect can take a function as an argument, print the inspection of > the result of calling that function, but still return the un-altered input, > I could do this: > > ["thing1", "thing2"] > |> generate_more_things() > |> IO.inspect(fn things -> length(things) end) > |> do_something_with_things() > > Or even: > > ["thing1", "thing2"] > |> generate_more_things() > |> IO.inspect(&length/1) > |> do_something_with_things() > > I think this would aid during debugging and be a useful feature in the > standard library. I'd love to implement and contribute on this, but I > wanted to see if such a thing would be accepted before beginning work. > > Open to feedback! > > -- > You received this message because you are subscribed to the Google Groups > "elixir-lang-core" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit https://groups.google.com/d/ > msgid/elixir-lang-core/4e2bfad0-b745-4059-8736- > 996e641c7bb2%40googlegroups.com > <https://groups.google.com/d/msgid/elixir-lang-core/4e2bfad0-b745-4059-8736-996e641c7bb2%40googlegroups.com?utm_medium=email&utm_source=footer> > . > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "elixir-lang-core" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/elixir-lang-core/CAGnRm4KAvw%2BwWnh7d60%3DvKEkuLvWfyoh4XuM9rbuxz_CaLg9%3DA%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
