Call me crazy, but whenever I need a deep copy, I use freezethaw... just to be sure, 'cause data structures have a tendency to grow beyond their original intentions...
#!/usr/bin/perl -w
use strict;
use Data::Dumper;
use FreezeThaw qw/ thaw freeze /;
my $ds = { -foo => [ -bar => [0, 1], 3 ],
-ping => 1 };
$ds->{-zort} = \$ds;
my ($dsft) = thaw freeze $ds;
$dsft->{-ping} = 2;
print Dumper [$ds, $dsft];
See... $ds and $dsft are two different objects now! yay. And no matter how they change, the deep copy will work for ever and ever.
[admin@ensim admin]$ perl ./test.pl
$VAR1 = [
{
'-zort' => \$VAR1->[0],
'-ping' => 1,
'-foo' => [
'-bar',
[
0,
1
],
3
]
},
{
'-ping' => 2,
'-zort' => \$VAR1->[1],
'-foo' => [
'-bar',
[
'0',
'1'
],
'3'
]
}
];
[admin@ensim admin]$
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