Clone - recursively copy Perl datatypes
use Clone clone; my $data = { set => [ 1 .. 50 ], foo => { answer => 42, object => SomeObject->new, }, }; my $cloned_data = clone($data); $cloned_data->{foo}{answer} = 1; print $cloned_data->{foo}{answer}; # 1 print $data->{foo}{answer}; # 42
You can also add it to your class:
package Foo; use parent Clone; sub new { bless {}, shift } package main; my $obj = Foo->new; my $copy = $obj->clone;
This module provides a clone() method which makes
recursive copies of nested hash, array, scalar and reference types,
including tied variables and objects.
clone() takes a scalar argument and duplicates it. To
duplicate lists, arrays or hashes, pass them in by reference, e.g.
my $copy = clone (\@array); # or my %copy = %{ clone (\%hash) };
Storable's dclone() is a flexible solution for cloning
variables, albeit slower for average-sized data structures. Simple and
naive benchmarks show that Clone is faster for data structures with 3 or
fewer levels, while dclone() can be faster for structures 4
or more levels deep.
Copyright 2001-2022 Ray Finch. All Rights Reserved.
This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
Ray Finch <rdf@cpan.org>
Breno G. de Oliveira <garu@cpan.org>, Nicolas
Rochelemagne <atoomic@cpan.org> and Florian Ragwitz
<rafl@debian.org> perform routine maintenance
releases since 2012.