Enum.into/3 should do what you want :)
On Thursday, 7 July 2016, Wiebe-Marten Wijnja <[email protected]>
wrote:
> I propose to add `into: collectable` as optional third argument to
> Enum.map.
>
> This would allow mapping over things without first converting it to a list
> and then convert it back.
>
> So:
>
> %{"a" => 1, "b" => 2}
> |> Enum.map(fn {k, v} -> {String.upcase(k), v} end)
> |> Enum.into(%{})
>
> could be written as:
>
> %{"a" => 1, "b" => 2}
> |> Enum.map(fn {k, v} -> {String.upcase(k), v} end, into: %{})
>
> Not having to do the list conversion in the middle might also improve
> performance.
>
>
> Right now, enumerating and collecting in one go is of course possible
> using `Kernel.SpecialForms.for`. `for` is however not very
> pipeline-friendly.
>
>
> What do you think?
>
>
> Sincerely,
>
> ~Wiebe-Marten
>
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--
Andrea Leopardi
[email protected]
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