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6
votes
"Hello world!" in Prolog
Why fail at all? Isn't success better than failure? A shorter version is thus:
main :- writeln('Hello world!').
Also, why even have side effects? Isn't a declarative solution much better:
message( …
1
vote
Aggregate cost for a directed graph in Prolog
Using global variables is a sure sign that you are not working within the declarative paradigm. A declarative way to solve this is to keep track of the already visited variables via an argument of you …
3
votes
Accepted
Iterating towards a goal
Executive summary:
please_use_very_readable_names insteadOfUnreadableOneslikeInJava.
Use higher-order predicates.
Always consider using DCGs when describing lists. pass1 and pass2 can be simplified …
2
votes
Accepted
Implementing an open/close function in Prolog
Always try hard to avoid assert/1 and retract/1: Using these predicates makes it impossible to reason about your other predicates in isolation, and therefore make debugging and extending your code muc …
1
vote
Adding elements in two lists as numbers
When describing lists, always consider using DCGs. In this case, try for example:
sum(Xs0, Ys0, Ls) :-
reverse(Xs0, Xs),
reverse(Ys0, Ys),
phrase(sum(Xs, Ys, 0), Ls0),
reverse(Ls0, Ls …
2
votes
Accepted
Binary Digits to ASCII Characters
Your concerns about style and format are warranted, +1 for striving to make the code more elegant and declarative!
First of all, whatDoYouFindEasierToRead: mixed_caps_or_underscores?
For that reason …