How to expand a query into a list?
f(a,b).
f(a,c).
d(a.d).
expand(f(a,X), Out) -----> Out=[b,c,d]
views:
122answers:
1
+3
A:
Use bagof/3 or setof/3. E.g.:
?- bagof(X, (X = 1; X = 2), L).
L = [1,2]
yes
In your case that would be
?- bagof(X, f(a,X), Out).
starblue
2009-09-18 16:11:03
yep that works, thanks!
Absolute0
2009-09-18 16:26:38
How can I pass the output of bagof into length?length(bagof(),O).
Absolute0
2009-09-18 16:31:37
bagof(X, ..., L), length(L, N). You need to read some introduction to Prolog.
starblue
2009-09-18 18:18:33