Array::Diff - Find the differences between two arrays
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' ];
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.
Create a new Array::Diff object.
Array::Diff
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.
added
deleted
count
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 properties set appropriately.
removed
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.
NEW
OLD
diff()
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.
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.
Algorithm::Diff
Daisuke Murase <typester@cpan.org>
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.
To install Array::Diff, copy and paste the appropriate command in to your terminal.
cpanm
cpanm Array::Diff
CPAN shell
perl -MCPAN -e shell install Array::Diff
For more information on module installation, please visit the detailed CPAN module installation guide.