| Extracted from Pike v7.8 release 700 at 2013-06-08.

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ADT
ADT.Relation
ADT.Relation.Binary

# Method ADT.Relation.Binary()->filter()

Method filter

  `object filter(function f)`

Description

  Filters the entries in the relation, and returns a relation with all those entries for which the filtering function f returned true. The function f gets two arguments: the left and the right value for every entry in the relation.