Subroutine and object

[perlsyntax]

I don't understand the 3 rules start out a program. in the book call Object Oriented, I do understand rule 1.How do you create a method and write a subroutine? And how do you create an object? P.S rem take it easy on me i a newbie with perl.

[chromatic]

There's no difference in declaring a method and a subroutine. The only difference is how you call methods and what arguments they get.

sub some_function
{
   my ($first, $second) = @_;

   ...
}

sub some_method
{
   my ($self, $first, $second) = @_;

   ...
}

You need to call a method with a class name or an object:

SomeClass->some_method( $first, $second );

$some_object->some_method( $first, $second );

To create an object, call a constructor (a method called with a class name). A constructor uses the bless operator to associate a reference with a class name:

package SomeClass;

sub new
{
    my $class = shift;
    bless {}, $class;
}

...

my $some_object = SomeClass->new();

[perlsyntax]

Does it matter if we start out with a subroutine or object?

[chromatic]

I don't understand the question. Start out how, as in appearance in the code or in which you should use first to solve a problem?