apply_if/3 ? On December 6, 2024, Ben Wilson <benwilson...@gmail.com> wrote:
Exploring what that looks concretely in this case: ``` map |> other_stuff |> then_if(opts[:foo], &Map.put(&1, :key, value)) ``` I like it! Conditional map insert helper functions are definitely something we've written over and over again in our code bases and while it's easy to do, I think in some cases this is cleaner looking than a proliferation of `maybe_put_foo` functions. - Ben On Friday, December 6, 2024 at 9:59:40 AM UTC-5 José Valim wrote: Hi Juan! > > My initial gut feeling is that this approach does not scale. What if you > want to delete a key conditionally? Should we have delete_if? > > It feels a more general approach would be to introduce `then_if`: > > then_if(subject, condition?, function) > > Or similar. :) > > *José Valimhttps://dashbit.co/ <https://dashbit.co/>* > > > On Fri, Dec 6, 2024 at 3:27 PM Juan Manuel Azambuja <ju...@mimiquate.com> > wrote: > > Hello, >> >> After working with Elixir for some time I have found myself repeating >> some patterns when dealing with maps. >> >> One pattern I see repeated constantly in different apps developed by >> myself or others is adding values to a map conditionally or returning the >> map unchanged. This comes in different flavors: >> >> >> or >> >> >> When this pattern gets used enough in an app, it's normal to see it >> abstracted in a MapUtils module that updates the map conditionally if a >> condition is met or returns the map unchanged otherwise. >> >> My proposal is to include Map.put_if/4 which would abstract the condition >> check and return the map unchanged if the condition is not met: >> >> >> >> Enhancing the API by doing this will result in less code and more >> readable solutions. >> >> Thanks for reading! >> >> -- >> 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-co...@googlegroups.com. >> To view this discussion visit >> https://groups.google.com/d/msgid/elixir-lang-core/ed7da716-b9f5-4f64-a77d-d32696326b9en%40googlegroups.com >> <https://groups.google.com/d/msgid/elixir-lang-core/ed7da716-b9f5-4f64-a77d-d32696326b9en%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 visit https://groups.google.com/d/msgid/elixir-lang-core/e9e799a2-ad69-4791-bd9a-22bca327652fn%40googlegroups.com <https://groups.google.com/d/msgid/elixir-lang-core/e9e799a2-ad69-4791-bd9a-22bca327652fn%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 visit https://groups.google.com/d/msgid/elixir-lang-core/CAOwN-EQaN%3DusguLg5z5oAo8oij0vbQM29y741syGXZQvEbryPw%40mail.gmail.com.
