Beefy Boxes and Bandwidth Generously Provided by pair Networks
Keep It Simple, Stupid
 
PerlMonks  

comment on

( #3333=superdoc: print w/replies, xml ) Need Help??
I tried to implement my solution with tying, too. The difference to your solution is there's no need to indicate what value you want: Perl just does what you mean, as usually:
#!/usr/bin/perl use warnings; use strict; { package MagicScalar; use Tie::Scalar; use parent qw( -norequire Tie::StdScalar ); use overload nomethod => \&stringify; sub TIESCALAR { my $class = shift; bless [], $class } sub STORE { my ($self, $value) = @_; $self->[0] = $value; } sub FETCH { my $self = shift; return $self } sub stringify { my $self = shift; return $self->[0] } } { package MagicHash; use Tie::Hash; use parent qw( -norequire Tie::StdHash ); sub STORE { my ($self, $key, $value) = @_; my $previous = $self->{$key}; if (ref $previous and $previous->isa('MagicScalar')) { $previous->STORE($value); } else { $self->{$key} = $value } } } tie my $test, 'MagicScalar'; $test = 'test'; tie my %hash, 'MagicHash'; %hash = (t => $test); print "Before $hash{t} $test\n"; my $change = 'changed'; $hash{t} = $change; print "After $hash{t} $test\n";
لսႽ ᥲᥒ⚪⟊Ⴙᘓᖇ Ꮅᘓᖇ⎱ Ⴙᥲ𝇋ƙᘓᖇ

In reply to Re^3: Changing a variable which is a value of a hash by choroba
in thread Changing a variable which is a value of a hash by benedicth

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":



  • Are you posting in the right place? Check out Where do I post X? to know for sure.
  • Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
    <code> <a> <b> <big> <blockquote> <br /> <dd> <dl> <dt> <em> <font> <h1> <h2> <h3> <h4> <h5> <h6> <hr /> <i> <li> <nbsp> <ol> <p> <small> <strike> <strong> <sub> <sup> <table> <td> <th> <tr> <tt> <u> <ul>
  • Snippets of code should be wrapped in <code> tags not <pre> tags. In fact, <pre> tags should generally be avoided. If they must be used, extreme care should be taken to ensure that their contents do not have long lines (<70 chars), in order to prevent horizontal scrolling (and possible janitor intervention).
  • Want more info? How to link or How to display code and escape characters are good places to start.
Log In?
Username:
Password:

What's my password?
Create A New User
Domain Nodelet?
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others rifling through the Monastery: (3)
As of 2023-09-22 23:59 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    No recent polls found

    Notices?