[erlang-questions] Second order function lists:map

[Jeroen Koops]

paa(Funs) -> fun(X) -> [ Fun(X) || Fun <- Funs] end.

??


2009/3/10 Franco Milicchio <franco.milicchio@REDACTED>

>
> On Mar 10, 2009, at 4:24pm, Rob Charlton wrote:
>
>  Is this what you are after?
>>
>> paa(A) ->
>>  fun(L) ->
>>          lists:map(fun(F)->
>>                            F(A)
>>                    end, L)
>>  end.
>>
>> 7> G = test:paa(42).
>> #Fun<test.0.118673008>
>> 8> G([fun math:sin/1, fun math:cos/1, fun math:tan/1]).
>> [-0.916522,-0.399985,2.29139]
>>
>>
>
> Rob, thanks for your answer!
>
> Actually, I was looking for the other way around:
>
> G = test:paa([fun math:sin/1, fun math:cos/1, fun math:tan/1]).
>
> G(0.5).
>
>
> Thanks!
>
> --
> Franco Milicchio <franco.milicchio@REDACTED>
>
> DIA - Dept. of Computer Science and Engineering
> University Roma Tre
> http://plm.dia.uniroma3.it/milicchio/
>
>
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