in reply to Writing my first module

> I am going to write "use MyPackage;" in my perl program, and then myPackage.pm will be placed in my Perl's INC directory.

Just a nitpick: the case is important. On some systems (e.g. linux), MyPackage.pm and myPackage.pm can be two files coexisting in the same directory.

map{substr$_->[0],$_->[1]||0,1}[\*||{},3],[[]],[ref qr-1,-,-1],[{}],[sub{}^*ARGV,3]

In Section Seekers of Perl Wisdom