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Merge pull request #720 from aarroyoc/max-min-list

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Add list_max & list_min to lists module
This commit is contained in:
Mark Thom
2020-12-06 15:39:42 -07:00
committed by GitHub
parent c55de17ca8 0696a18e0b
commit cf8014582b
1 changed files with 14 additions and 1 deletions
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15
src/lib/lists.pl
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@@ -2,7 +2,7 @@
memberchk/2, reverse/2, length/2, maplist/2,
maplist/3, maplist/4, maplist/5, maplist/6,
maplist/7, maplist/8, maplist/9, same_length/2, nth0/3,
sum_list/2, transpose/2, list_to_set/2]).
sum_list/2, transpose/2, list_to_set/2, list_max/2, list_min/2]).
:- use_module(library(error)).
@@ -200,3 +200,16 @@ nth0_search(N, N, [E|_], E).
nth0_search(N0, N, [_|Es], E) :-
N1 is N0 + 1,
nth0_search(N1, N, Es, E).
list_max([N|Ns], Max) :-
foldl(list_max_, Ns, N, Max).
list_max_(N, Max0, Max) :-
Max is max(N, Max0).
list_min([N|Ns], Min) :-
foldl(list_min_, Ns, N, Min).
list_min_(N, Min0, Min) :-
Min is min(N, Min0).