[SOLVED] Perl can't find readonly.pm

MTK358 · 05-18-2010, 07:36 PM

I am following a gtk2-perl tutorial, so I wrote the test program, installed gtk2-perl, and got this error:

Code:

Can't locate readonly.pm in @INC (@INC contains: /usr/lib/perl5/site_perl/5.10.1 /usr/share/perl5/site_perl/5.10.1 /usr/lib/perl5/vendor_perl /usr/share/perl5/vendor_perl /usr/share/perl5/vendor_perl /usr/lib/perl5/core_perl /usr/share/perl5/core_perl /usr/lib/perl5/current /usr/lib/perl5/site_perl/current .) at ./test.pl line 7.
BEGIN failed--compilation aborted at ./test.pl line 7.

I googled readonly.pm, and figured out it's part of some Readonly module.

But how do I install it?

Preferably using the Arch package manager?

Sergei Steshenko · 05-18-2010, 07:38 PM

Quote:

Originally Posted by MTK358

I am following a gtk2-perl tutorial, so I wrote the test program, installed gtk2-perl, and got this error:

Code:

Can't locate readonly.pm in @INC (@INC contains: /usr/lib/perl5/site_perl/5.10.1 /usr/share/perl5/site_perl/5.10.1 /usr/lib/perl5/vendor_perl /usr/share/perl5/vendor_perl /usr/share/perl5/vendor_perl /usr/lib/perl5/core_perl /usr/share/perl5/core_perl /usr/lib/perl5/current /usr/lib/perl5/site_perl/current .) at ./test.pl line 7.
BEGIN failed--compilation aborted at ./test.pl line 7.

I googled readonly.pm, and figured out it's part of some Readonly module.

But how do I install it?

Preferably using the Arch package manager?

Publish the source code you've tried to compile.

Sergei Steshenko · 05-18-2010, 07:40 PM

Quick CPAN search shows:

http://search.cpan.org/~roode/Readonly-1.03/Readonly.pm
.

I.e. capital R in "readonly". Is this the module ? Is small rather than capital 'R' the problem ?

MTK358 · 05-18-2010, 07:46 PM

Quote:

Originally Posted by Sergei Steshenko

Quick CPAN search shows:

http://search.cpan.org/~roode/Readonly-1.03/Readonly.pm
.

I.e. capital R in "readonly". Is this the module ? Is small rather than capital 'R' the problem ?

OK, how do I install it?

Sergei Steshenko · 05-18-2010, 07:55 PM

Quote:

Originally Posted by MTK358

OK, how do I install it?

The generic way is using 'cpan' utility which comes with Perl. I.e. you begin from

perldoc cpan
.

Since ArchLinux is a build from source distro, probably using 'cpan' is the ArchLinux way.

Running 'cpan' for the first time takes time - it needs to download some data common for all the modules, to create caches, etc.

MTK358 · 05-18-2010, 08:04 PM

In cpan, I typed:

Code:

install Readonly

but my code still doesn't work!

Code:

#!/usr/bin/perl

use warnings;
use strict;

use Gtk2 '-init';
use readonly true => 1;
use readonly false => 0;

my $window = Gtk2::Window->new;
$window->set_title('Gtk2-Perl Test');
$window->signal_connect(delete_event => sub { Gtk2->main_quit; true });

my $button = Gtk2::Button->new('Click Me');
$button->signal_connect(clicked => sub { print "Pressed!\n"; });
$window->add($button);

$window->show_all;
Gtk2->main;

Sergei Steshenko · 05-18-2010, 08:29 PM

Quote:

Originally Posted by MTK358

In cpan, I typed:

Code:

install Readonly

but my code still doesn't work!

Code:

#!/usr/bin/perl

use warnings;
use strict;

use Gtk2 '-init';
use readonly true => 1;
use readonly false => 0;

my $window = Gtk2::Window->new;
$window->set_title('Gtk2-Perl Test');
$window->signal_connect(delete_event => sub { Gtk2->main_quit; true });

my $button = Gtk2::Button->new('Click Me');
$button->signal_connect(clicked => sub { print "Pressed!\n"; });
$window->add($button);

$window->show_all;
Gtk2->main;

You appear to have great difficulties differentiating small and capital 'R' letters.

grail · 05-18-2010, 09:04 PM

+1 to Sergei's observation that you have installed Readonly but only referred to readonly in your script.

Sergei Steshenko · 05-18-2010, 09:34 PM

Quote:

Originally Posted by grail

+1 to Sergei's observation that you have installed Readonly but only referred to readonly in your script.

And the relationship between module and file names is mandated by Perl documentation (perldoc perlmod).

PMP · 05-19-2010, 02:13 AM

You picked this script from somewhere?

If the intention is to make true and false as 1 and 0 respectively.
Please have a look at

Code:

use constant true => 1
use constant false => 0

And in case Readonly is the only option. Please see the usage for Readonly.pm on CPAN

MTK358 · 05-19-2010, 07:10 AM

Quote:

Originally Posted by Sergei Steshenko

You appear to have great difficulties differentiating small and capital 'R' letters.

I didn't know that that had to do with the Readonly module.

It's just that in the tutorial I was following, it (appearently wrongly) said "readonly" (beginning with a lowercase letter) in the code.

Quote:

Originally Posted by PMP

You picked this script from somewhere?

If the intention is to make true and false as 1 and 0 respectively.
Please have a look at

Code:

use constant true => 1
use constant false => 0

That works!

EDIT: This is the tutorial I was following:

http://www.google.com/url?sa=t&sourc...dfloJ6GKgbi73A