[erlang-questions] missing function

[Maxim Treskin]

Hello

I can't find standard function which returns position of element in list
like:

num(El, List) ->
    num(El, List, 1).

num(_, [], _) -> {error, not_found};
num(El, [H|T], Acc) ->
    case H of
        El -> Acc;
        _ -> num(El, T, Acc+1)
    end.

I think it strange. Can you clarify this point?

Thank you.

-- 
Maxim Treskin
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