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.