Understanding this prolog implementation of head

Posted by dmindreader on Stack Overflow See other posts from Stack Overflow or by dmindreader
Published on 2010-04-06T22:27:47Z Indexed on 2010/04/06 22:33 UTC
Read the original article Hit count: 217

Filed under:

prolog

head([Y],Y):-!.

head([X|XS],X).

I understand that the head of the list is stored on the variable X.

What does the first clause mean? Is it a cut? Why?

Related posts about prolog

Prolog open source community, code repository,blogs,forums

as seen on Stack Overflow - Search for 'Stack Overflow'
I find useful groups.google.com/group/comp.lang.prolog/topics cs.cmu.edu/afs/cs/project/ai-repository/ai/areas/ google.com/Top/Computers/Programming/Languages/Prolog/Implementations/ allisons.org/ll/Logic/Prolog/Examples/ prolog.info/ Maybe there are else useful links? Please share it :-) >>> More
Prolog - ASSERT and RETRACT

as seen on Stack Overflow - Search for 'Stack Overflow'
I was wondering, I am aware you can use assert to add facts or rules or whatever if you have declared the predicate to be -:dynamic, but this only allows the changes that are made to be kept in that session only, e.g. if you close the prolog window then the database changes are lost. So I was wondering… >>> More
Prolog : Simple question

as seen on Stack Overflow - Search for 'Stack Overflow'
I want to add any strings user entered into a list run :- write('How many students you have: '),read(x),nl. enterNameOfStudents(x). enterNameOfStudents(x) :- for(A, 1, x, 1),write('Please enter the names of students'),read(A),??????,nl,fail. What do i put in the ?????? portion to ensure… >>> More
Real world Prolog usage

as seen on Stack Overflow - Search for 'Stack Overflow'
Many study Prolog in college, but I have personally not come in contact with it professionally. The traditional examples given are AI and expert system applications, but what have you used it for and what made Prolog a suitable language for the task? >>> More
Simple question - XSB Prolog

as seen on Stack Overflow - Search for 'Stack Overflow'
Hello! I'm diving into the world of prolog headfirst but I seem to have hit shallow water! I'm looking at database manipulation in prolog with regards to this tutorial:Learn Prolog Now! It states that I can see my database by entering listing So i tried it and it should basically output everything… >>> More

Developer IT

Understanding this prolog implementation of head - Developer IT

Understanding this prolog implementation of head

prolog

Related posts about prolog

Prolog open source community, code repository,blogs,forums

Prolog - ASSERT and RETRACT

Prolog : Simple question

Real world Prolog usage

Simple question - XSB Prolog

Categories cloud