SWI-Prolog -- ord_subtract/3

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Predicate ord_subtract/3

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Availability::- use_module(library(ordsets)).(can be autoloaded)

Source

[det]ord_subtract(+InOSet, +NotInOSet, -Diff)

Diff is the set holding all elements of InOSet that are not in NotInOSet.

History

Enhanced in 8.5.4 (👉dba2460) ord_subtract/3: use => rules to trap wrong calls and stop when the list of elements to be subtracted is exhausted.