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Full Discussion: Perl Methods Calling
Top Forums Shell Programming and Scripting Perl Methods Calling Post 302792909 by yadavricky on Thursday 11th of April 2013 09:59:13 AM
Old 04-11-2013
RedHat perl
Quote:
Originally Posted by adisky123
Hello
I am on my way to improve my wonderful Perl skills, I got an issue which I want to share with you all. I have a Perl module which looks like
Code:
package Cocoa;

 require Exporter;
@ISA = qw(Exporter);
 
 my $a='';
 my $b='';
 my $c='';
 
 sub new {
     my $this = shift;  # Create an anonymous hash, and #self points to it.
     my $class = ref($this) || $this; 
     my $this = {};
     bless $this,$class;       # Connect the hash to the package Cocoa.
     return $this;     # Return the reference to the hash.

     }
 1;
 
 sub doInitialization {
    $a="1";
     $b="1";
     $c="3";
 }

and I want to print the value of variables a, b and c. I am trying below but fails
Code:
 #!/usr/bin/perl
 use Cocoa;
$cup = new Cocoa;
$cup->doInitialization();
print "$cup->{$a}\n";

It does not print any thing. Also it does not throw any error..
Try to use printf

Code:
printf "output: %d\n",$cup->{a};
or
printf "output: %d\n",$cup->{$a};
or 
printf "output: %s\n",$cup->{a};
or 
printf "output: %s\n",$cup->{$a};

i do not have time to test but one them should work.

best of luck
 

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LEARN ABOUT CENTOS

perl::critic::policy::variables::prohibitlocalvars

Perl::Critic::Policy::Variables::ProhibitLocalVars(3)	User Contributed Perl Documentation  Perl::Critic::Policy::Variables::ProhibitLocalVars(3)

NAME

       Perl::Critic::Policy::Variables::ProhibitLocalVars - Use "my" instead of "local", except when you have to.

AFFILIATION

       This Policy is part of the core Perl::Critic distribution.

DESCRIPTION

       Since Perl 5, there are very few reasons to declare "local" variables.  The most common exceptions are Perl's magical global variables.	If
       you do need to modify one of those global variables, you should localize it first.  You should also use the English module to give those
       variables more meaningful names.

	   local $foo;	 #not ok
	   my $foo;	 #ok

	   use English qw(-no_match_vars);
	   local $INPUT_RECORD_SEPARATOR    #ok
	   local $RS			    #ok
	   local $/;			    #not ok

CONFIGURATION

       This Policy is not configurable except for the standard options.

NOTES

       If an external module uses package variables as its interface, then using "local" is actually a pretty sensible thing to do.  So
       Perl::Critic will not complain if you "local"-ize variables with a fully qualified name such as $Some::Package::foo.  However, if you're in
       a position to dictate the module's interface, I strongly suggest using accessor methods instead.

SEE ALSO

       Perl::Critic::Policy::Variables::ProhibitPunctuationVars

AUTHOR

       Jeffrey Ryan Thalhammer <jeff@imaginative-software.com>

COPYRIGHT

       Copyright (c) 2005-2011 Imaginative Software Systems.  All rights reserved.

       This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.  The full text of this license
       can be found in the LICENSE file included with this module.

perl v5.16.3							    2014-06-09		     Perl::Critic::Policy::Variables::ProhibitLocalVars(3)
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