@josevalim Can you provide a hint on how to do it more efficiently other
than comparing the two lengths - just an idea or where to look to?
On Wednesday, February 21, 2024 at 12:21:56 PM UTC+1 José Valim wrote:
> +1 for the proposal, but it has to be implemented more efficiently than
> what was described here and we also need to add drop!. PRs welcome.
>
> On Wed, Feb 21, 2024 at 10:59 AM Artur Plysiuk <ifu...@gmail.com> wrote:
>
>> I just came here to add the same proposal.
>>
>> четвер, 28 грудня 2023 р. о 11:40:07 UTC+2 DaTrader пише:
>>
>>> It's not special at all. Actually it is as generic as the current
>>> `Keyword.take/2`. You either want the operation to succeed if there aren't
>>> all keys present or you want it to fail. Those are two equally important
>>> use cases.
>>>
>>> On Thursday, December 28, 2023 at 3:21:50 AM UTC+1 rogers...@gmail.com
>>> wrote:
>>>
>>>> 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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