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Re^4: package vs module? (zentara package/module tutorial)

by Anonymous Monk
on Mar 27, 2014 at 11:19 UTC ( #1079904=note: print w/replies, xml ) Need Help??


in reply to Re^3: package vs module?
in thread package vs module?

...Mea Culpa, Mea Culpa, Mea Maxima Culpa!. :-)

I quite liked you description :)

So here is the

zentara package/module tutorial

a package (ZenTara) is inlined with the main source code

zen-pack.pl

#!/usr/bin/perl -- use strict; use warnings; ZenTara::hello(); ZenTara::goodbye(); exit( 0 ); package ZenTara; sub hello { print "\nHello\n"; } sub ZenTara::goodbye { print "\nGoodbye\n" }

a module is when you put the package into a separate file

ZenTara.pm , save in current directory or in ... site/lib/ZenTara.pm

package ZenTara; use strict; use warnings; sub hello { print "\nHello\n"; } sub ZenTara::goodbye { print "\nGoodbye\n" } 1; ## return true

zen-mod.pl is the perl program that does not inline but instead uses ZenTara

#!/usr/bin/perl -- use strict; use warnings; use ZenTara; ZenTara::hello(); ZenTara::goodbye(); exit( 0 );

less typing by importing functions from ZenTaraE; also making objects

zen-mod-exp.pl imports hello/goodbye from ZenTaraE, also creates an object

#!/usr/bin/perl -- use strict; use warnings; use ZenTaraE; hello(); ZenTaraE->new( name => "Bob" )->goodbye(); exit( 0 );

ZenTaraE.pm uses Exporter to export hello/goodbye by default, and has object constructor "new"

package ZenTaraE; use strict; use warnings; require Exporter; our @ISA = qw/ Exporter /; our @EXPORT = qw/ hello goodbye /; # exported by default sub new { my $class = shift; return bless { @_ }, $class; } sub hello { print "\nHello\n"; } sub goodbye { my( $self ) = @_; my $name = eval { $self->{name} } || ''; print "\nGoodbye $name\n" } 1; ## return true

rip modules apart and insert them directly into your script

zen-mod-exp-inlined.pl inlining comes first before main program with %INC trick to make ZenTaraEI useable

#!/usr/bin/perl -- BEGIN { $INC{'ZenTaraEI.pm'} = __FILE__; package ZenTaraEI; use strict; use warnings; require Exporter; our @ISA = qw/ Exporter /; our @EXPORT = qw/ hello goodbye /; # exported by default sub new { my $class = shift; return bless { @_ }, $class; } sub hello { print "\nHello\n"; } sub goodbye { my( $self ) = @_; my $name = eval { $self->{name} } || ''; print "\nGoodbye $name\n" } 1; ## return true }########## use strict; use warnings; use ZenTaraEI; hello(); ZenTaraEI->new( name => "Bob" )->goodbye(); exit( 0 ); exit( 0 );

See how they run

$ perl zen-pack.pl Hello Goodbye $ perl zen-mod.pl Hello Goodbye $ perl zen-mod-exp.pl Hello Goodbye Bob $ perl zen-mod-exp-inlined.pl Hello Goodbye Bob $

For more info see Simple Module Tutorial and perlmod

Replies are listed 'Best First'.
Re^5: package vs module? (zentara package/module tutorial)
by zentara (Archbishop) on Mar 27, 2014 at 14:17 UTC
    Gee, thanks for writing out that code. I feel like Tom Sawyer, thanks for whitewashing the fence. :-)

    I'm not really a human, but I play one on earth.
    Old Perl Programmer Haiku ................... flash japh

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