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author | Jed Barber <jjbarber@y7mail.com> | 2014-04-03 21:07:06 +1100 |
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committer | Jed Barber <jjbarber@y7mail.com> | 2014-04-03 21:07:06 +1100 |
commit | 0b65dd864a804a6b96ca1b8aeacd947eeb361538 (patch) | |
tree | 288974d3d6f9b9ddf6d1cd7f03c0a8215f4069e4 /misc.prolog | |
parent | 133d71983ea4e39e6e971ca052b2eb0bf7437cc6 (diff) |
Moving some clauses around to more appropriate modules
Diffstat (limited to 'misc.prolog')
-rw-r--r-- | misc.prolog | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/misc.prolog b/misc.prolog new file mode 100644 index 0000000..6d8ad68 --- /dev/null +++ b/misc.prolog @@ -0,0 +1,20 @@ + +:- module(misc, [filter/3, head/2, tail/2]). + + + + +filter(List, Predicate, Result) :- + Test =.. [Predicate,X], + findall(X, Test, No), + subtract(List, No, Result). + + +head(X,[Y]) :- X = Y. +head(X,[Y|_]) :- X = Y. + + +tail(X,[]) :- X = []. +tail(X,[_]) :- X = []. +tail(X,[_|Y]) :- X = Y. + |