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Pack logtalk -- logtalk-3.98.0/library/combinations/NOTES.md

This file is part of Logtalk https://logtalk.org/ SPDX-FileCopyrightText: 1998-2026 Paulo Moura <pmoura@logtalk.org> SPDX-License-Identifier: Apache-2.0

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

combinations

This library provides predicates for generating and querying combinations over lists. The following categories of predicates are provided:

  • Generation operations - Predicates for generating combinations, including combinations with replacement.
  • Ordering variants - Predicates that support an additional order argument (default, lexicographic, or shortlex) for controlling output order.
  • Distinct-value generation - Predicates for generating combinations while deduplicating equal-valued results.
  • Indexed access - Predicates for direct access to combinations at specific positions.
  • Counting operations - Predicates for counting combinations with and without replacement.
  • Random selection - Predicates for randomly selecting combinations. Dedicated subsequences and permutations libraries are also available for focused APIs on those operations.

API documentation

Open the [../../apis/library_index.html#combinations](../../apis/library_index.html#combinations) link in a web browser.

Loading

To load all entities in this library, load the loader.lgt file:

| ?- logtalk_load(combinations(loader)).

Testing

To test this library predicates, load the tester.lgt file:

| ?- logtalk_load(combinations(tester)).