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| Current File : //usr/share/doc/libvariable-magic-perl/examples/synopsis.pl |
#!/usr/bin/perl
use strict;
use warnings;
use Variable::Magic qw<wizard cast VMG_OP_INFO_NAME>;
{
my $wiz = wizard set => sub { print "now set to ${$_[0]}!\n" },
free => sub { print "destroyed!\n" };
my $a = 1;
cast $a, $wiz;
$a = 2; # "now set to 2!"
} # "destroyed!"
{
my $wiz = wizard data => sub { $_[1] },
fetch => sub { $_[2] = $_[1] unless exists $_[0]->{$_[2]}; () },
store => sub { print "key $_[2] stored in $_[-1]\n" },
copy_key => 1,
op_info => VMG_OP_INFO_NAME;
my %h = (_default => 0, apple => 2);
cast %h, $wiz, '_default';
print $h{banana}, "\n"; # "0", because the 'banana' key doesn't exist in %h
$h{pear} = 1; # "key pear stored in helem"
}
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