A complete working sample using
Data::Dumper where an object having a
DateTime reference can be printed in short and long versions depending on
$Data::Dumper::Freezer:
# Foo.pm
package Foo;
use strict;
use warnings;
use DateTime;
sub new {
my $class = shift;
my $self = { _timevalue => DateTime->now, };
bless( $self, $class );
return $self;
}
# Modify _timevalue and return blessed reference
sub _dumper_hook {
$_[0] = bless {
%{ $_[0] },
_timevalue => $_[0]->{_timevalue}->ymd . q{ }
. $_[0]->{_timevalue}->hms,
},
ref( $_[0] );
}
1;
__END__
Test:
# Foo.t:
use strict;
use warnings;
use Data::Dumper;
use Test::More;
plan tests => 2;
use Foo;
my $f = Foo::->new;
{
local $Data::Dumper::Freezer = '_dumper_hook';
like(
Dumper($f),
qr/\d{4}-\d{2}-\d{2}\s\d{2}:\d{2}:\d{2}/,
q{prints short version}
);
}
unlike(
Dumper($f),
qr/\d{4}-\d{2}-\d{2}\s\d{2}:\d{2}:\d{2}/,
q{prints long version}
);
__END__
Run:
$ perl Foo.t
1..2
ok 1 - prints short version
ok 2 - prints long version
$
--
No matter how great and destructive your problems may seem now, remember, you've probably only seen the tip of them. [1]
-
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.