How do I use Perl modules?

Perl provides three ways to use modules: do, require, and use.

  1. do looks for the module file by searching the @INC path.
  2. require loads the module file once.
  3. use is similar to require except that Perl applies it before the program starts.

How do I install CPAN modules in Strawberry Perl?

Run CPAN client from the Strawberry Perl or Strawberry Perl (64-bit), sub folder Tools, entry in the Start menu. Type install Module::Name there.

How do I install Perl modules in CPAN?

To install Perl modules using CPAN, you need to use the cpan command-line utility. You can either run cpan with arguments from the command-line interface, for example, to install a module (e.g Geo::IP) use the -i flag as shown.

How do I install Perl modules in Linux?

For each of the modules that you downloaded, complete the following steps:

  1. Unpack it into a writable directory.
  2. Run the Perl configure command: perl Makefile.pl .
  3. Run the make command.
  4. Run the make test command. Do not proceed until this command completes successfully.
  5. Run the make install command.

How do I open a JSON file in Perl?

#/usr/lib/perl use lib qw( ..); use LWP::Simple; use JSON; my $filename = ‘/file. txt’; my $data; if (open (my $json_str, $filename)) { local $/ = undef; my $json = JSON->new; $data = $json->decode(<$json_str>); close($json_stream); } print $data->{name};

How do you call a Perl module?

A module can be loaded by calling the use function. #!/usr/bin/perl use Foo; bar( “a” ); blat( “b” );

Where does Perl look for modules?

Perl interpreter (which runs your perl program) will use a special array called @INC to search for a file containing the module. Each value in the @INC array is a directory name (but see note below); Perl will search within those directories in a loop using the rules specified below.

Where does Perl install Cpanm?

By default, it installs to the site_perl directory that belongs to your perl.

How do I know if a Perl module is installed?

Installing the perl module

  1. Verify if the perl module is installed; you have two options for verification (using the perl command or find): perl -e “use Date:: module name ”
  2. Install the perl module, using the following command: cpan -i module name.

What is Perl modules in Linux?

The Perl module packages (also referred to as Distributions, because each can contain multiple modules) add useful objects to the Perl language. The packages listed on this page are required or recommended for other packages in the book.