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difference between packages and module

by Anonymous Monk
on Jun 21, 2005 at 05:35 UTC ( #468563=perlquestion: print w/ replies, xml ) Need Help??
Anonymous Monk has asked for the wisdom of the Perl Monks concerning the following question:

hai monks,
I refer so many books and sites, but they didn't explain clearly or I cannot understand correctly.
So I need clear explanation with small example.
Thanks in advance

Comment on difference between packages and module
Re: difference between packages and module
by ysth (Canon) on Jun 21, 2005 at 05:40 UTC
    A package is a division of the global namespace; that means you can have a global variable $foo and/or a sub named foo in one package and a different global variable $foo and different sub named foo in a different package.

    A "module" is a file named according to the package it contains, so module Foo::Bar would be in a file named Foo/Bar.pm. There's no need for packages to be modules or for a module to contain only that one package.

    The term "module distribution" refers to a collection of one or more modules that get built/installed together. Sometimes the "distribution" part is left off and it's just called "module", but it's really a different idea than a single module.

Re: difference between packages and module
by displeaser (Hermit) on Jun 21, 2005 at 07:08 UTC
    See also the perlmod doc that probably came with your perl distribution.

    perldoc perlmod

    Should bring it up for you locally.

    It is also available on the Internet here: perlmod.

Re: difference between packages and module
by davidrw (Prior) on Jun 21, 2005 at 12:43 UTC
Re: difference between packages and module
by tlm (Prior) on Jun 21, 2005 at 12:51 UTC

    Here are a few small examples, roughly ordered from most to least typical.

    the lowliest monk

Re: difference between packages and module
by vinoth.ree (Vicar) on Mar 12, 2009 at 05:10 UTC

    * Packages are perl files with .pm extn and is considered a separate namespace. So a package is nothing but group of related scalars,arrays,hashes and subroutines for a specific purpose.

    Once a package is included in a .pl file (using "use") and you want to call one of the subroutines of the package, you may have to use the scope resolution operator &package::subroutine1

    * Modules are packages but which has the capabilities of exporting selective subroutines/scalars/arrays/hashes of the package to the namespace of the main package itself. So for the interpreter these look as though the subroutines are part of the main package itself and so there is no need to use the scope resolution operator while calling them.

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