Scripting Best Practices - page 2
Treat Your Variables Right
A perl-specific tip: the single most helpful thing you can do for yourself is to use these lines in every script:
#!/usr/bin/perl -w use strict;The -w flag turns on warnings. This means that if perl sees something that it thinks looks dubious (e.g. variables mentioned only once), it'll tell you so.
use strict requires you to declare all your variables before (or at least at) their first use. Thus,
my $newvar; // some stuff $newvar = 3;will be AOK, as would my $newvar = 3. But $newvar = 3 without the declaration (or a local declaration) will cause an error. This is fantastic for avoiding typos or variable name brain-blips: if you declared $newvar and then use $newcar a few lines down, you'll be warned.
Sponsored by BlackBerry
BlackBerry® Enterprise Server Express enables businesses of any size to quickly and easily get started with the BlackBerry solution. It provides advanced BlackBerry smartphone features with no additional software or user license fees, and works with any Internet-enabled BlackBerry data plan or a BlackBerry enterprise data plan. Download now!