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

zambal <>
Wed Jan 21 16:15:11 CET 2009



On 21 jan, 14:46, mats cronqvist <> wrote:
> Bjorn Gustavsson <> writes:
>
> > For consistency with the rest of the lists module (and in particular
> > the keysearch/3 function) I think that 'false' is the best value.
>
> > (In general, I agree that "half booleans" should be avoided
> > in new code.)
>
>   so doing it Right(tm), i.e. returning the value if found or exit(),
>   is out of the question?
>   seems i've written this function at least a thousand times;
>
> keyfind(Key,N,List) ->
>   {value,{Key,Val} = lists:keysearch(Key,N,List),
>   Val.
>
>   mats
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As a lightweight dictionary alternative, I like Mats' suggestion best:
give back the value, otherwise crash.

Best,
Vincent



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