I think we’ll stick with `posts.group_by(&:id).transform_values { |v|
v.title.uppercase }` — and it’s not because we don’t `value_fun`! 😄
> Den 5. dec. 2017 kl. 01.48 skrev David Carlin <david.car...@cultureamp.com>:
>
> Elixir has a great feature in its Enumerable,group_by/3 function where you
> can pass 2 functions to it. The first being what to group by (called a
> key_fun). The second being a function that returns the val (called the
> value_fun). See: https://hexdocs.pm/elixir/Enum.html#group_by/3
>
> By default the value_fun is a function that does nothing ie. fn x -> x end
> (making its default behaviour the same as Ruby/Rails group_by method)
>
> I would like this functionality in Rails. What do you think, dear community?
>
> (Apologies if this has been brought up before. I did a quick search but found
> nothing)
>
> Thanks
>
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