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Ingy döt Net 2023-07-01 11:58:00 -04:00
parent 7387c8f97b
commit cb5bb5e222
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Task/Averages-Arithmetic-mean/Mercury/averages-arithmetic-mean-1.mercury Normal file
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:- module arithmetic_mean.
:- interface.
:- import_module io.
:- pred main(io::di, io::uo) is det.
:- implementation.
:- import_module float, list, require.
main(!IO) :-
io.print_line(mean([1.0, 2.0, 3.0, 4.0, 5.0]), !IO).
:- func mean(list(float)) = float.
mean([]) = func_error("mean: emtpy list").
mean(Ns @ [_ | _]) = foldl((+), Ns, 0.0) / float(length(Ns)).
:- end_module arithmetic_mean.

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Task/Averages-Arithmetic-mean/Mercury/averages-arithmetic-mean-2.mercury Normal file
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:- func mean(list(float)::in(non_empty_list)) = (float::out).
mean(Ns) = foldl((+), Ns, 0.0) / float(length(Ns)).