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We've expanded our Perl news coverage and improved our search! Search for all things Perl across O'Reilly! Perl Resources | Topic: Text Tools disjoin disjoin -- the contrary of a database %22join%22. It is useful for performing set operations on text database files; it is especially useful (for example!) for administrating passwd files (for instance when you want to remove some entries from the passwd file without deleting them, but storing them in a different file for backup). It allows to do set complement and set difference extremely easily on this kind of files.
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