Extracted from Pike v7.4 release 341 at 2005-11-21.
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predef::
ADT
ADT.Relation
ADT.Relation.Binary

Method ADT.Relation.Binary()->`<=()


Method `<=

mixed `<=(object rel)

Description

The expression `rel1 <= rel2' returns true if every relation entry in rel1 is also present in rel2.