* Jos I. Boumans ([EMAIL PROTECTED]) [09 Jun 2001 10:32]:
> and for some abbreviation:
> $ENV{'HTTP_REFERER'} : $previous = $ENV{'HTTP_REFERER'} ? $previous = "an
> unknown site";
[...]
> god bless one liners =)
Surely you mean:
$previous = $ENV{HTTP_REFERER} ? $ENV{HTTP_REFERER} : 'an unknown site';
Only one use of the variable name, thus easier to maintain =)
Of course, there is a sideeffect in both this, the original and the one
the original is based upon:
+ If there was no key 'HTTP_REFERER' in %ENV, then there is now
(albeit undefined).
Hence, you may really want:
$previous = exists($ENV{HTTP_REFERER}) && length($ENV{HTTP_REFERER})
? $ENV{HTTP_REFERER}
: 'an unknown site';
(Note: && has higher precedence than ?:, but when in doubt, use parens)
cheers,
--
iain. <http://eh.org/~koschei/>
Just don't compare it with a real language, or you'll be unhappy... :-)
-- Larry Wall in <[EMAIL PROTECTED]>
