Hi, what are the two stars in a list?
[53, 5, 1, 53, 97, 115, 53, 50, 52, 121, 55, 56, 55, 97, 4, 1, 98, **]
I tried searching but no success.
Thanks, Jan
+6
A:
The stars indicate that the term contains itself, e.g.
?- X = f(X).
X = f(**).
?- L = [53, L].
L = [53, **].
This is the case at least in SWI-Prolog. See also https://mailbox.iai.uni-bonn.de/mailman/public/swi-prolog/2009/001707.html.
Kaarel
2010-02-01 13:57:47
A:
You are right. It is an infinite recursion. Do you know any way how to get rid of it?
I mean how to get from [9,8,7,6,**] to [9,8,7,6]. I tried different approaches but nothing has helped so far.
I get ** while using flatten/2.
Jan
2010-02-06 12:18:57
Open a new question explaining why do you want to get rid of the recursion, what have you tried so far, and what is the input list for flatten/2. Then delete this "answer" because this in not an answer but a question.
Kaarel
2010-02-07 22:02:52