Ana Saiz García am Dienstag, 13. Februar 2007 13:02:
> On 12/02/07, D. Bolliger <[EMAIL PROTECTED]> wrote:
> > Ana Saiz García am Montag, 12. Februar 2007 22:26:
[snipp and following code stripped]
> > #!/usr/bin/perl
> >
> > # don't forget:
> > #
> > use strict;
> > use warnings;
> >
> > package A;
> > sub hello { print "hello from A\n" }
> >
> > package main;
> >
> > my $pkg='A';
> > my $sub=\&{$pkg.'::hello'};
> > $sub->();
> >
> > __END__
>
> Hi again and thanks for your help
>
> Don't I have to put "use" and the name of packages A and B anywhere on the
> main program?
Not if the package declarations are in the same file as the main package; in
most cases the modules are in separate files, and then 'use' is necessary to
read, and compile the files with the module (package) definitions.
See perldoc -f use.
Therein is explained that 'use Module' is equivalent to
BEGIN { require Module; import Module LIST; }
perldoc -f require
perldoc Exporter # defines the import() method mentioned above
'use' searches for modules in the paths defined in the @INC variable (see
perldoc perlvar) which can be modified directly or (preferred) via the lib
pragma:
use lib '/some/path'; # see: perldoc lib
regards,
Dani
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