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 PlDoc When you need help with PlDoc (SWI-Prolog documentation), e.g. writing declaration headers, creating output, etc. Pack Use this when you need help with a Pack. Predicate When you are not sure which SWI-Prolog base or library predicate, combination of predicates, or options for a predicate(s) to use. 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.

Topic	Replies	Views	Activity
About the Help! category Help!	1	702	December 9, 2019
Unclear use of timeout in unit tests Help!	5	420	March 27, 2025
Some small omissions in prolog_read_source_term/4? Predicate	1	22	March 27, 2025
Using trace in pengine server, any way to send the output trace to the client? Help! pengines , debugging	0	21	March 24, 2025
Is it possible to serialise PCE Classes? Predicate	3	36	March 22, 2025
Wasm vs swish and others Tools	20	191	March 19, 2025
Choice points with lists Help!	4	51	March 14, 2025
Janus: py_call(1 + 2, Sum) PlDoc	8	70	March 13, 2025
Swipl-bundle.js not working Help! bug , how-to , wasm	4	49	March 9, 2025
Switching away from DFS: yet another beginner mystified Help!	21	207	March 7, 2025
Docs on XPCE keybinding events? Data Structure	2	36	March 4, 2025
Abusing "dynamic" predicates Help!	3	72	February 21, 2025
How to interpret the comma separated coverage data? Help!	1	47	February 15, 2025
^D not longer working after importing pac Help!	7	63	February 6, 2025
How to embed Python into Prolog on MacOS? Pack how-to	2	37	February 3, 2025
How to replace empty atoms with fresh variables in a dict? Predicate	1	43	February 3, 2025
Found a bug: it involves a variable in a single branch and a lambda Help!	12	105	February 3, 2025
Goal Evaluation with Timeouts Help!	14	1485	January 24, 2025
PL_get_integer returns false even with confirmed integer term_t Help! ffi	10	84	January 24, 2025
Serializing terms with the foreign language interface PlDoc	1	25	January 24, 2025
A little benchmark shows a slow first access to tabled predicates Help!	0	42	January 23, 2025
Want to get minimal term_expansion example working Help! macro	3	39	January 21, 2025
Source_sink dtd does not exist Help!	6	49	January 21, 2025
Arrow up/down keys do not work across terminal sessions Tools	2	48	January 20, 2025
Exit on Option keystroke - MacOS Intel only builds Help!	5	37	January 15, 2025
I encounter different behaviour on abort Help!	3	36	January 13, 2025
Modules - explicit `reexport` of operators Help!	4	50	January 12, 2025
Swipl pack publish Data Structure bug	5	46	January 12, 2025
Misleading documentation of sort/4 PlDoc	2	59	January 5, 2025
Two-way deterministic zero-padding of a list Algorithm	16	129	December 26, 2024