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array::diff

Array::Diff(3pm)					User Contributed Perl Documentation					  Array::Diff(3pm)

NAME

       Array::Diff - Find the differences between two arrays

SYNOPSIS

	   my @old = ( 'a', 'b', 'c' );
	   my @new = ( 'b', 'c', 'd' );

	   my $diff = Array::Diff->diff( @old, @new );

	   $diff->count   # 2
	   $diff->added   # [ 'd' ];
	   $diff->deleted # [ 'a' ];

DESCRIPTION

       This module compares two arrays and returns the added or deleted elements in two separate arrays.  It's a simple wrapper around
       Algorithm::Diff.

       And if you need more complex array tools, check Array::Compare.

METHODS

       new ()
	   Create a new "Array::Diff" object.

       diff ( OLD, NEW )
	   Compute the differences between two arrays.	The results are stored in the "added", "deleted", and "count" properties that may be
	   examined using the corresponding methods.

	   This method may be invoked as an object method, in which case it will recalculate the differences and repopulate the "count", "added",
	   and "removed" properties, or as a static method, in which case it will return a newly-created "Array::Diff" object with the properies
	   set appropriately.

       added ( [VALUES ] )
	   Get or set the elements present in the "NEW" array and absent in the "OLD" one at the comparison performed by the last "diff()"
	   invocation.

       deleted ( [VALUES] )
	   Get or set the elements present in the "OLD" array and absent in the "NEW" one at the comparison performed by the last "diff()"
	   invocation.

       count ( [VALUE] )
	   Get or set the total number of added or deleted elements at the comparison performed by the last "diff()" invocation.  This count
	   should be equal to the sum of the number of elements in the "added" and "deleted" properties.

SEE ALSO

       Algorithm::Diff

AUTHOR

       Daisuke Murase <typester@cpan.org>

COPYRIGHT AND LICENSE

       Copyright (c) 2009 by Daisuke Murase.

       This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

       The full text of the license can be found in the LICENSE file included with this module.

perl v5.10.1							    2010-10-08							  Array::Diff(3pm)