I don't see such special use cases as good candidates to be included in
builtins libraries.
Em segunda-feira, 18 de dezembro de 2023 às 07:56:11 UTC-3, DaTrader
escreveu:
> Many times I need to merge a subset of a keyword list or a map into
> another keyword list or map while requiring it to fail if not all keys are
> present.
>
> For this purpose I have small utility modules called KwUtils and MapUtils
> where I have functions like the one below:
>
> ```
> @doc """
> Takes specified key-value pairs from the keyword list but raises if any
> not found.
> """
> @spec take!( keyword(), [ atom()]) :: keyword()
> def take!( kw, keys) do
> taken = Keyword.take( kw, keys)
>
> if length( taken) != length( keys) do
> raise "Expected all keys in #{ inspect( keys)} to be present in #{
> inspect( kw)}"
> end
>
> taken
> end
> ```
>
> It'd be nice if a corresponding function was part of the `Keyword` and
> `Map` modules each.
>
>
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