Data commit

Task/Range-expansion/Prolog/range-expansion.pro

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+range_expand :-
+	L = '-6,-3--1,3-5,7-11,14,15,17-20',
+	writeln(L),
+	atom_chars(L, LA),
+	extract_Range(LA, R),
+	maplist(study_Range, R, LR),
+	pack_Range(LX, LR),
+	writeln(LX).
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% extract_Range(?In, ?Out)
+% In  : '-6,-3--1,3-5,7-11,14,15,17-20'
+% Out : [-6], [-3--1], [3-5],[7-11], [14],[15], [17-20]
+%
+extract_Range([], []).
+
+extract_Range(X , [Range | Y1]) :-
+	get_Range(X, U-U, Range, X1),
+	extract_Range(X1, Y1).
+
+get_Range([], Range-[], Range, []).
+get_Range([','|B], Range-[], Range, B) :- !.
+
+get_Range([A | B], EC, Range, R) :-
+	append_dl(EC, [A | U]-U, NEC),
+	get_Range(B, NEC, Range, R).
+
+
+append_dl(X-Y, Y-Z, X-Z).
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%
+% study Range(?In, ?Out)
+% In  : [-6]
+% Out : [-6,-6]
+%
+% In  : [-3--1]
+% Out : [-3, -1]
+%
+study_Range(Range1, [Deb, Deb]) :-
+       catch(number_chars(Deb, Range1), Deb, false).
+
+study_Range(Range1, [Deb, Fin]) :-
+       append(A, ['-'|B], Range1),
+       A \= [],
+       number_chars(Deb, A),
+       number_chars(Fin, B).
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%
+:- use_module(library(clpfd)).
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%
+% Pack Range(?In, ?Out)
+% In  : -6,
+% Out : [-6]
+%
+% In  : -3, -2,-1
+% Out : [-3,-1]
+%
+pack_Range([],[]).
+
+pack_Range([X|Rest],[[X | V]|Packed]):-
+    run(X,Rest, [X|V], RRest),
+    pack_Range(RRest,Packed).
+
+
+run(Fin,[Other|RRest], [Deb, Fin],[Other|RRest]):-
+	Fin #\= Deb,
+	Fin #\= Deb + 1,
+	Other #\= Fin+1.
+
+run(Fin,[],[_Var, Fin],[]).
+
+run(Var,[Var1|LRest],[Deb, Fin], RRest):-
+	Fin #\= Deb,
+	Fin #\= Deb + 1,
+	Var1 #= Var + 1,
+	run(Var1,LRest,[Deb, Fin], RRest).
+
+run(Val,[Other|RRest], [Val, Val],[Other|RRest]).