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https://github.com/Mercury-Language/mercury.git
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3a83702562
library/random.m:
Add predicates shuffle_list/{4,5} and shuffle_array/{4,5}.
library/random.m:
library/random.sfc*.m:
Improve comments.
tests/hard_coded/Mmakefile:
tests/hard_coded/random_shuffle*.{m,exp}:
Test the new predicates.
40 lines
960 B
Mathematica
40 lines
960 B
Mathematica
%---------------------------------------------------------------------------%
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% vim: ts=4 sw=4 sts=4 et ft=mercury
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%---------------------------------------------------------------------------%
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:- module random_shuffle2.
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:- interface.
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:- import_module io.
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:- pred main(io::di, io::uo) is det.
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:- implementation.
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:- import_module int.
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:- import_module list.
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:- import_module random.
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:- import_module random.sfc16.
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main(!IO) :-
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List = 1 `..` 100,
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R = sfc16.init,
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test(List, 10, R, _, !IO).
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:- pred test(list(int)::in, int::in, R::in, R::out, io::di, io::uo) is det
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<= random(R).
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test(List, Count, !R, !IO) :-
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( if Count > 0 then
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shuffle_list(List, Shuffled, !R),
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sort_and_remove_dups(Shuffled, Sorted),
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( if Sorted = List then
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io.write_string("Passed.\n", !IO)
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else
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io.write_string("Failed!\n", !IO)
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),
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test(List, Count - 1, !R, !IO)
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else
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true
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).
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