at_end_of_line

max_list,min_list


git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@1237 b08c6af1-5177-4d33-ba66-4b1c6b8b522a

docs/yap.tex

@@ -7217,9 +7217,9 @@ Holds when @code{append(_,Suffix,List)} holds.
 
 @item sum_list(?@var{Numbers}, ?@var{Total})
 @findex sum_list/2
-@snindex sum_list/2
+@syindex sum_list/2
 @cnindex sum_list/2
-True when @var{Numbers} is a list of integers, and @var{Total} is their sum.
+True when @var{Numbers} is a list of numbers, and @var{Total} is their sum.
 
 @item sumlist(?@var{Numbers}, ?@var{Total})
 @findex sumlist/2
@@ -7229,6 +7229,18 @@ True when @var{Numbers} is a list of integers, and @var{Total} is their
 sum. The same as @code{sum_list/2}, please do use @code{sum_list/2}
 instead.
 
+@item max_list(?@var{Numbers}, ?@var{Max})
+@findex max_list/2
+@syindex max_list/2
+@cnindex max_list/2
+True when @var{Numbers} is a list of numbers, and @var{Max} is the maximum.
+
+@item min_list(?@var{Numbers}, ?@var{Min})
+@findex min_list/2
+@syindex min_list/2
+@cnindex min_list/2
+True when @var{Numbers} is a list of numbers, and @var{Min} is the minimum.
+
 @end table
 
 @node Ordered Sets, Pseudo Random, Lists, Library

library/lists.yap

@@ -26,8 +26,10 @@
 	suffix/2,
 	sumlist/2,
         list_concat/2,
-        flatten/2
-	]).
+        flatten/2,
+	max_list/2,	 
+	min_list/2
+		]).
 
 
 %   append(Prefix, Suffix, Combined)
@@ -331,3 +333,29 @@ flatten_list([]) --> !.
 flatten_list([H|T]) --> !, flatten_list(H),flatten_list(T).
 flatten_list(H) --> [H].
  
+max_list([H|L],Max) :-
+	max_list(L,H,Max).
+
+max_list([],Max,Max).
+max_list([H|L],Max0,Max) :-
+	(
+	  H > Max0 
+	->
+	  max_list(L,H,Max)
+	;
+	  max_list(L,Max0,Max)
+	).
+
+min_list([H|L],Max) :-
+	max_list(L,H,Max).
+
+min_list([],Max,Max).
+min_list([H|L],Max0,Max) :-
+	(
+	  H < Max0 
+	->
+	  max_list(L, H, Max)
+	;
+	  max_list(L, Max0, Max)
+	).
+

pl/yio.yap

@@ -873,6 +873,16 @@ at_end_of_stream(S) :-
 	'$peek'(S,N), N = -1.
 
 
+at_end_of_line :-
+	current_input(S),
+	at_end_of_line(S).
+
+at_end_of_line(S) :-
+	'$past_eof'(S), !.
+at_end_of_line(S) :-
+	'$peek'(S,N), ( N = 10 -> true ; N = -1).
+
+
 consult_depth(LV) :- '$show_consult_level'(LV).
 
 absolute_file_name(V,Out) :- var(V), !,