We will look at how the contents of this array are constructed and can be manipulated to affect where the Perl interpreter will find module files. Default @INC The Perl interpreter is compiled with a specific default value for @INC. To find this value, run the command env -i perl -V (env -i ignores the … Read more
Let’s say I have a package MyPackage that uses @EXPORT. #this is MyPackage.pm package MyPackage; @EXPORT = qw(do_awesome_thing); sub do_awesome_thing { … } sub be_awesome { … } Now, when I use MyPackage in my code, #this is myscript.pl use MyPackage; do_awesome_thing(); #works be_awesome(); #doesn’t work MyPackage::be_awesome(); #works do_awesome_thing gets automatically exported to my code … Read more
If you have root, type in console (Debian/Ubuntu): sudo apt-get install libdbi-perl
This may happen when perl or perl modules are installed separately along side the official packages. Environment variable can be used to switch to a different perl installation. To find out if that is the case run: env | grep PERL Having PERL5LIB or PERL_LOCAL_LIB_ROOT in the output might cause the issue. Try unsetting the … Read more
On Linux Mint I had to type $ sudo apt-get install libswitch-perl
Because Perl modules are required to return a value to signal if the require directive must succeed (true value returned) or fail (false value returned; this can make sense if the module failed to initialize for some reason). If you don’t return anything, the interpreter cannot know if the require must succeed or fail; at … Read more
1 at the end of a module means that the module returns true to use/require statements. It can be used to tell if module initialization is successful. Otherwise, use/require will fail. $somevar is a variable which is accessable only inside the block. It is used to simulate “static” variables. Starting from Perl 5.10 you can … Read more
$ perl -MCPAN -e shell cpan shell — CPAN exploration and modules installation (v1.9402) Enter ‘h’ for help. cpan[1]> install Net::TCP::Server And it’s instructive to list the configuration with the o conf command.
You can still use ppm, but it is not recommended. 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.
You can check for a module’s installation path by: perldoc -l XML::Simple The problem with your one-liner is that, it is not recursively traversing directories/sub-directories. Hence, you get only pragmatic module names as output.