Hello
SergioQ,
Your question is not very clear to me. What do you mean with: "messy blessed text messes"? I searched for something in your recent posts, quickly, I cant find something relevant.
You got good replies (see LanX's one). As he said bless is used to add something like a flag to a reference. The flag says: I'm not from here. I come from Whatever::Package so see there to see how I behave. When some method of this blessed reference is called (a method is simple sub) the first parameter received will be the object itself, generally named $self but just as convention.
A full minimalist example
use strict;
use warnings;
# usually this is defined inside a perl module
# at ./Whatever/Package.pm
package Whatever::Package;
# this is the constructor. generally called new but is not a rule
sub new{
# we will receive the class name as first argument
my $class = shift;
# and just need to return a reference (an anonymous hash {} in thi
+s case) blessed into $class
return bless {}, $class;
}
sub first {
my $self = shift;
print "We are inside package ",__PACKAGE__,
" we received \$self because it is blessed into ",ref $sel
+f,"\n";
}
# usually this is defined inside a perl module
# at ./Another/Example/Package.pm
package Another::Example::Package;
# note the same NAME for the sub
sub first {
my $self = shift;
print "This method will no be called unless the object is blessed
+into Another::Example::Package";
}
# usually the script will use Whatever::Package (defined inside a perl
+ module ./Whatever/Package.pm)
# but we can merely switch back to the default package 'main'
package main;
# again a sub with the same name
sub first{
print "We are inside package ",__PACKAGE__," I'm not a method but
+a bare lone sub\n";
}
# test the local sub
first();
# let 'instanciate' an object of the Whatever::Package class
my $obj = Whatever::Package->new();
print "\$obj is now a blessed reference. It is blessed into ",ref $obj
+,"\n";
# above we have 3 subs named first. Which one will be called?
$obj->first();
Start with the standard documentation. See package too.
If you can get a copy of the old but valid Perl CookBook read:
Chapter 11: References and Records
Chapter 12: Packages, Libraries, and Modules
Chapter 13: Classes, Objects, and Ties
L*
There are no rules, there are no thumbs..
Reinvent the wheel, then learn The Wheel; may be one day you reinvent one of THE WHEELS.
-
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.