Tie::Cycle - Online Linux Manual PageSection : 3
Updated : 2022-01-21
Source : perl v5.34.0
Note : User Contributed Perl Documentation
NAMETie::Cycle − Cycle through a list of values via a scalar.
SYNOPSIS​ use v5.10; ​ use Tie::Cycle; ​ ​ tie my $cycle, 'Tie::Cycle', [ qw( FFFFFF 000000 FFFF00 ) ]; ​ ​ say $cycle; # FFFFFF ​ say $cycle; # 000000 ​ say $cycle; # FFFF00 ​ say $cycle; # FFFFFF back to the beginning ​ ​ (tied $cycle)−>reset; # back to the beginning
DESCRIPTIONYou use Tie::Cycle to go through a list over and over again. Once you get to the end of the list, you go back to the beginning. You don't have to worry about any of this since the magic of tie does that for you. The tie takes an array reference as its third argument. The tie should succeed unless the argument is not an array reference. Previous versions required you to use an array that had more than one element (what's the pointing of looping otherwise?), but I've removed that restriction since the number of elements you want to use may change depending on the situation. During the tie, this module makes a shallow copy of the array reference. If the array reference contains references, and those references are changed after the tie, the elements of the cycle will change as well. See the included test.pl script for an example of this effect.
OBJECT METHODSYou can call methods on the underlying object (which you access with tied() ). reset Roll the iterator back to the starting position. The next access will give the first element in the list. previous Give the previous element. This does not affect the current position. next Give the next element. This does not affect the current position. You can peek at the next element if you like.
SOURCE AVAILABILITYThis module is on Github: ​ https://github.com/briandfoy/tie−cycle
AUTHORbrian d foy, <bdfoy@cpan.org>
COPYRIGHT AND LICENSECopyright © 2000−2022, brian d foy <bdfoy@cpan.org>. All rights reserved. This software is available under the Artistic License 2.0. 0
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