Clone(3) User Contributed Perl Documentation Clone(3)
NAME
Clone - recursively copy Perl datatypes
SYNOPSIS
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;
DESCRIPTION
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) };
SEE ALSO
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
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.
AUTHOR
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.
perl v5.34.1 2022-10-18 Clone(3)
clone 0.460.0 - Generated Thu Oct 20 08:16:39 CDT 2022