`map` would have the connotation of applying a function to all elements of a collection. `apply` would more directly have the connotation of running a function with some arguments.
`IO.inspect(value, apply: &length/1)` I like the idea of being able to narrow down what I'm inspecting during the print-debugging workflow I inevitably regress to. `nested_structure |> IO.inspect(apply: & get_in(&1, [:foo, :bar, :baz]))`. Thumbs up for the idea. mån 15 jan. 2018 kl 17:31 skrev Marcus Gartner <[email protected]>: > Doh! I should have realized the issue with executing the function passed. > > I like the idea of a transform option that can be passed. > > IO.map makes sense in my example, but wouldn't make sense to me if the > pipeline wasn't dealing with an enumerable, and it would be nice if this > feature was general enough to work idiomatically with any possible values. > > On Sat, Jan 13, 2018 at 7:38 PM OvermindDL1 <[email protected]> wrote: > >> Or call it `map` as it's shorter and perfectly descriptive. I've made a >> few variants of this myself and I'd love it built into IO.inspect. >> >> On Jan 12, 2018 16:31, "Greg Vaughn" <[email protected]> wrote: >> >>> I like the original idea and would like to suggest another approach. >>> What if there were an additional Inspect.Opts of :transform? It then would >>> enable this sort of thing: >>> >>> ["thing1", "thing2"] >>> |> generate_more_things() >>> |> IO.inspect(transform: &length/1) >>> |> do_something_with_things() >>> >>> -Greg Vaughn >>> >>> > On Jan 12, 2018, at 5:18 PM, José Valim <[email protected]> wrote: >>> > >>> > 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 Valim >>> > 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 >>> . >>> > 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. >>> >>> -- >>> 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/6CF01F3F-5848-4E19-BCA1-9D256824D6E0%40gmail.com >>> . >>> For more options, visit https://groups.google.com/d/optout. >>> >> -- >> > You received this message because you are subscribed to a topic in the >> Google Groups "elixir-lang-core" group. >> To unsubscribe from this topic, visit >> https://groups.google.com/d/topic/elixir-lang-core/TUkmNHI4IbI/unsubscribe >> . >> To unsubscribe from this group and all its topics, send an email to >> [email protected]. > > >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/elixir-lang-core/CAJhqboH_tYYRPFWf8HuVJru5phmOmU7tK_PDWVca36mUfWhJ8Q%40mail.gmail.com >> <https://groups.google.com/d/msgid/elixir-lang-core/CAJhqboH_tYYRPFWf8HuVJru5phmOmU7tK_PDWVca36mUfWhJ8Q%40mail.gmail.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/CAONCvEwH7a8GzHtQb78gGo0H95BJVxq8KPAcvGy3cZKYXr9nGA%40mail.gmail.com > <https://groups.google.com/d/msgid/elixir-lang-core/CAONCvEwH7a8GzHtQb78gGo0H95BJVxq8KPAcvGy3cZKYXr9nGA%40mail.gmail.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. 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