author - Lars Buitinck add_to_heap (+Heap0, +Priority, ?Key, -Heap) is semidet Adds Key with priority Priority to Heap0, constructing a new Merging both in constant time, deletion of the minimum in logarithmicĪmortized time (though delete-min, i.e., get_from_heap/3, takes linear time The current version implements pairing heaps. Them in between heap operations may change the ordering. The portray_heap/1 predicateĪlthough the data items can be arbitrary Prolog data, keys/priorities mustīe ordered by Be careful when using variables as keys, since binding Singleton_heap/3 are SWI-specific extension. The SICStus Prolog library module of the same name. This module implements min-heaps, meaning that items are retrieved inĪscending order of key/priority. Such as best-first/A* search and Kruskal's minimum-spanning-tree algorithm. This makes them the data structure ofĬhoice for implementing priority queues, a central element of algorithms Heaps are data structures that return the entries inserted into them in an
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