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Programming-Idioms

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Idiom #311 Deep copy an object

Create the new object y by cloning the all the contents of x, recursively.

classes
var
  x,y: TPersistent;
...
  y.assign(x);
...
let y = structuredClone(x);
use v5.7.3;
use Storable qw(dclone);
my $x = [ 1, 2, [ 'a' ], { x => [3,4] } ];

my $y = dclone $x;
import copy
y = copy.deepcopy(x)
y = Marshal.load(Marshal.dump(x))
New implementation...
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programming-idioms.org 
var
  x,y: TPersistent;
...
  y.assign(x);
...
let y = structuredClone(x);
my $x = [ 1, 2, [ 'a' ], { x => [3,4] } ];

my $y = dclone $x;
y = copy.deepcopy(x)
y = Marshal.load(Marshal.dump(x))