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.
Solid state disks (SSDs) made a splash in consumer technology, and now the technology has its eyes on the enterprise storage market. Download this eBook to see what SSDs can do for your infrastructure and review the pros and cons of this potentially game-changing storage technology.
- 1Linux Top 3: Ubuntu 14.04, Debian Gives Squeeze More Life and Red Hat Goes Atomic
- 2Linux Top 3: CoreOS, Oracle Enterprise Linux 7 and Ubuntu 14.10
- 3Linux Top 3: Debian Dumps SPARC, Ubuntu Takes Over Linux 3.13 and the Core Infrastructure Initiative
- 4Linux Top 3: Fedora, Ubuntu and Gluster Lose Community Leaders
- 5Red Hat Enterprise Linux 7 Finally Hits the Big Time