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//usr/share/doc/perl-Clone/README.md

Clone - recursively copy Perl datatypes
=======================================

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This module provides a `clone()` method which makes recursive
copies of nested hash, array, scalar and reference types,
including tied variables and objects.

```perl
    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:

```perl
    package Foo;
    use parent 'Clone';
    sub new { bless {}, shift }

package main;

my $obj = Foo->new;
    my $copy = $obj->clone;
```

`clone()` takes a scalar argument and duplicates it. To duplicate lists,
arrays or hashes, pass them in by reference, e.g.

```perl
    my $copy = clone (\@array);

# or

my %copy = %{ clone (\%hash) };
```