From 0b65dd864a804a6b96ca1b8aeacd947eeb361538 Mon Sep 17 00:00:00 2001 From: Jed Barber Date: Thu, 3 Apr 2014 21:07:06 +1100 Subject: Moving some clauses around to more appropriate modules --- misc.prolog | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) create mode 100644 misc.prolog (limited to 'misc.prolog') 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. + -- cgit