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Retrieve all keys of a blackboard.
bb_keys(+Board, -Vector)
bb_keys/2 retrieves all keys from the key/value tuples in the blackboard Board and stores them in a newly created term vector. Vector will be unified with the resulting term vector. The order in which the elements are stored in the term vector is not defined.
Arguments
Board blackboard Vector variable
Examples
bb_create(Board),
bb_put(Board, one, 1),
bb_put(Board, two, 2),
bb_put(Board, three, 3),
bb_keys(Board, Vector),
tv_list(Vector, L)
->
L = [two, one, three]
Standard
This predicate is not part of the ISO-Prolog Standard.
See also
term vector. bb_clear/1, bb_clear_2/2, bb_create/1, bb_contains/2, bb_contains_key/2, bb_get/3, bb_get_4/4, bb_put/3, bb_put_4/4, bb_remove/2. bb_keys/2. bb_elements/2.| document: http://www.ifcomputer.co.jp/MINERVA/Manual/Reference/Predicates/blackboard/bb_keys/print_en.html published 2008/11/17 update 2001/2/7 (c) 1996-2006 IF Computer Japan | ||||||||
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