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March 2014 update

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Ingy döt Net 2014-04-02 16:56:35 +00:00
parent 09687c4926
commit a25938f123
1846 changed files with 21876 additions and 5203 deletions
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13
Task/Power-set/Prolog/power-set-1.pro
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@ -1,9 +1,6 @@
power_set(T, PS) :-
bagof(PS1, power_set(T, [], PS1), PS).
powerset(X,Y) :- bagof( S, subseq(S,X), Y).
power_set(T, PS, PS1) :-
select(E, T, T1), !,
append(PS, [E], PST),
( PST = PS1; power_set(T1, PS, PS1); power_set(T1, PST, PS1)).
power_set([], [], []).
subseq( [], []).
subseq( [], [_|_]).
subseq( [X|Xs], [X|Ys] ) :- subseq(Xs, Ys).
subseq( [X|Xs], [_|Ys] ) :- append(_, [X|Zs], Ys), subseq(Xs, Zs).

23
Task/Power-set/Prolog/power-set-2.pro
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@ -1,18 +1,5 @@
:- use_module(library(chr)).
:- chr_constraint chr_power_set/2, chr_power_set/1, clean/0.
clean @ clean \ chr_power_set(_) <=> true.
clean @ clean <=> true.
only_one @ chr_power_set(A) \ chr_power_set(A) <=> true.
creation @ chr_power_set([H | T], A) <=>
append(A, [H], B),
chr_power_set(T, A),
chr_power_set(T, B),
chr_power_set(B).
empty_element @ chr_power_set([], _) <=> chr_power_set([]).
power_set( [], [[]]).
power_set( [X|Xs], PS) :-
power_set(Xs, PS1),
maplist( append([X]), PS1, PS2 ), % i.e. prepend X to each PS1
append(PS1, PS2, PS).

18
Task/Power-set/Prolog/power-set-3.pro Normal file
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@ -0,0 +1,18 @@
:- use_module(library(chr)).
:- chr_constraint chr_power_set/2, chr_power_set/1, clean/0.
clean @ clean \ chr_power_set(_) <=> true.
clean @ clean <=> true.
only_one @ chr_power_set(A) \ chr_power_set(A) <=> true.
creation @ chr_power_set([H | T], A) <=>
append(A, [H], B),
chr_power_set(T, A),
chr_power_set(T, B),
chr_power_set(B).
empty_element @ chr_power_set([], _) <=> chr_power_set([]).