3-arg open is considered more secure than 2-arg open,
as perl won't be looking to change it's behavior based
upon any special characters (such as
< > |)
(update: in the filename).
Since 3-arg open has no default (you can't leave the second
arg undefined), you must explicitly indicate "open for read-only".
Finally, some people simply like to be explicit.
Why would you write
foreach my $apple (qw(McIntosh Empire Gala)){ $apple }
When this would do just fine
foreach (qw(McIntosh Empire Gala)){ $_ }
--
I'm not belgian but I play one on TV.
