Help!

Data Structure Use this category if you need help with a specific data structure or trying to find a data structure, e.g. Association lists or Ordered Sets Tools Use when needing help with tools such as Emacs as opposed to needing help with coding. Algorithm Use this category when you need help implementing an algorithm. If you need help with a single predicate then use the Help - Predicate category instead. Predicate When you are not sure which SWI-Prolog base or library predicate, combination of predicates, or options for a predicate(s) to use.

Topic	Replies	Views	Activity
About the Help! category Help!	2	131	December 9, 2019
Get Value from browser element in XPCE prolog Help!	1	8	July 4, 2020
Problem with saved state and http_server at Win10 Help!	4	20	July 4, 2020
Refactor of doom: inter-module issue regarding caller / callee Help!	15	79	July 3, 2020
Building a port scanner Help!	47	169	July 3, 2020
- string_codes/2 with escape sequences \xXX for CR with LF Predicate	4	24	July 3, 2020
SWI-Prolog manual comment section of DCG page can be cleaned up too Tools	1	21	July 1, 2020
Incrementally tabling a predicate that uses rdf Help!	4	50	June 30, 2020
An existential version of maplist? Predicate	4	98	June 30, 2020
Ordering residual goals in query answers Help! discussion	11	132	June 28, 2020
How to write POSIX text files under Windows? Help! how-to	3	36	June 26, 2020
Curve25519 in library crypto Algorithm	13	87	June 26, 2020
What's the rationale for `must_be/2` to throw on type mismatch? Help! discussion	16	211	June 25, 2020
Regression logistics please help Help!	4	61	June 25, 2020
C style block -- is it a bad idea Help!	13	175	June 24, 2020
Problem with redefining operators for propositional logic Help!	2	58	June 24, 2020
Exported module predicate and alternate goal expansion Help!	2	50	June 22, 2020
Open dif/2 constraint not being printed - may be expected Predicate discussion	3	45	June 21, 2020
Why can't I add chr constraints in declaratives when reading a file? Help!	5	45	June 20, 2020
Interval arithmetic (just a few functions) Help! how-to	6	81	June 20, 2020
Swipl-win, 8.3.2, invoke goals at startup Predicate bug	3	50	June 19, 2020
Global variables and threads Help!	18	184	June 19, 2020
Module clashing with apply:include/3 Help!	7	61	June 17, 2020
Dif/2 call as implication premiss: is the implication's else part run? Should it be? Help! discussion	29	227	June 17, 2020
How to shut down a multithreaded program (not necessarily gracefully) Help!	4	63	June 17, 2020
Distinct people sharing a birthday Algorithm	4	54	June 16, 2020
Config font names, nothing happens Help!	5	63	June 14, 2020
Execution time of Prolog program always increases Help! bug	3	61	June 14, 2020
On Ubuntu 19.10: /usr/bin/ld: cannot find -llibswipl collect2: error: ld returned 1 exit status Help!	6	46	June 14, 2020
Undefined reference to `WinMain@16' for external predicate example for swipl-ld Help!	4	37	June 14, 2020