In Perl, functions and subroutines can return different values based on the context of the caller (scalar, array or void). A nice feature of the Perl debugger is the r command, which tells you what ...

If you’ve been thinking along OOP lines, you probably have a subroutine for initializing your dataset already. Teaching Perl to treat your hashref as an object is quite simple.

Nothing instills more fear in the average Perl programmer than working with XS, Perl's technology for interfacing with eXternal Subroutines in other languages, most notably C. Calling C libraries from ...