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Ingy döt Net 2023-07-01 11:58:00 -04:00
parent 7387c8f97b
commit cb5bb5e222
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Task/Partial-function-application/Mercury/partial-function-application.mercury Normal file
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:- module partial_function_application.
:- interface.
:- import_module io.
:- pred main(io::di, io::uo) is det.
:- implementation.
:- import_module int, list.
main(!IO) :-
io.write((fsf1)([0, 1, 2, 3]), !IO), io.nl(!IO),
io.write((fsf2)([0, 1, 2, 3]), !IO), io.nl(!IO),
io.write((fsf1)([2, 4, 6, 8]), !IO), io.nl(!IO),
io.write((fsf2)([2, 4, 6, 8]), !IO), io.nl(!IO).
:- func fs(func(V) = V, list(V)) = list(V).
fs(_, []) = [].
fs(F, [V | Vs]) = [F(V) | fs(F, Vs)].
:- func f1(int) = int.
f1(V) = V * 2.
:- func f2(int) = int.
f2(V) = V * V.
:- func fsf1 = (func(list(int)) = list(int)).
fsf1 = fs(f1).
:- func fsf2 = (func(list(int)) = list(int)).
fsf2 = fs(f2).