[erlang-questions] lists:keyfind as an alternative to lists:keysearch

Bjorn Gustavsson <>
Wed Jan 21 10:24:44 CET 2009


On Tue, Jan 20, 2009 at 4:15 PM, James Hague <> wrote:
>
> I would like to propose the addition of lists:keyfind/3, which is
> identical in structure to lists:keysearch/3, except that it returns
> either 'false' or the found tuple, with no additional wrapping of the
> result.  This can be trivially added to the lists module:
>
>   keyfind(K, N, L) ->
>      case keysearch(K, N, L) of
>         {_, Tuple} -> Tuple;
>         X -> X
>      end.
>

Good idea.

Unless someone has any good reasons agains this suggestion, we will probably
implement it in R13. (lists:keyfind/3 will be a BIF, and
lists:keysearch/3 implemented
in Erlang.)

/Bjorn
-- 
Björn Gustavsson, Erlang/OTP, Ericsson AB



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