Yeah, this is a great idea. I would love this :) I also agree that it would better to do it with an option though.
On Mon, Dec 28, 2020 at 3:01 PM Felipe Stival <v0id...@gmail.com> wrote: > I'm 100% in for this as a `:with` or `:apply` option for IO.inspect/2. I > believe adding it as a new function may add unnecessary cognitive overhead. > > On Mon, Dec 28, 2020, 16:49 Jonathan Moraes <altjohn...@gmail.com> wrote: > >> Hello alchemists, >> >> I have a simple yet powerful proposal for an inspection function that can >> apply a desired function in a value and return the value itself. >> >> For example, if today I want to inspect the keys of a given map inside a >> chain of pipes, I need to do the following: >> >> ... >> |> map >> |> inspect_keys() >> |> ... >> >> defp inspect_keys(map) do >> IO.inspect(Map.keys(map)) >> map >> end >> >> Another example: if I want to count an Enumerable inside a function: >> >> defp my_function(param) do >> list = build_list(param) >> IO.inspect(Enum.count(list)) >> list >> end >> >> With a function that can inspect using a function AND return the value >> itself, both examples can be simplified: >> >> ... >> |> map >> |> IO.inspect_with(&Map.keys/1) >> |> ... >> >> defp my_function(param) do >> param >> |> build_list() >> |> IO.inspect_with(&Enum.count/1) >> end >> >> Since the second parameter from IO.inspect/2 is a keyword list of >> options, @v0idpwn (from Elixir Brasil Telegram group) suggested a new >> option called :apply. For example: >> >> IO.inspect([1, 2, 3], apply: &Enum.count/1) >> >> -- >> 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 elixir-lang-core+unsubscr...@googlegroups.com. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/elixir-lang-core/b0a390d1-9530-492c-b1fb-8ead8c9b938an%40googlegroups.com >> <https://groups.google.com/d/msgid/elixir-lang-core/b0a390d1-9530-492c-b1fb-8ead8c9b938an%40googlegroups.com?utm_medium=email&utm_source=footer> >> . >> > -- > 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 elixir-lang-core+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/elixir-lang-core/CAKC64%2ByAG0XvQwV%3DJq6r78AqU4xsNAivn6kX-Gr-fGPevYfzmg%40mail.gmail.com > <https://groups.google.com/d/msgid/elixir-lang-core/CAKC64%2ByAG0XvQwV%3DJq6r78AqU4xsNAivn6kX-Gr-fGPevYfzmg%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > -- 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 elixir-lang-core+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/elixir-lang-core/CAK-yb0CQThUAaPveb4et%3DwVjcwrko9Tyb-vo-zBQJM0kRwSqRw%40mail.gmail.com.
