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]
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试):
问题:
回答1:
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).
