Cat question

So one of my cats has thrown up actual food, twice in the last week. Usually she just has one furball (fur, not food) once a week. Pretty normal for long-furred cats. But this week, TWICE, actual food.

Should I take her to the vet? Is she sick with a virus?

Or should I just change her food? Is the food too rich for her or something? What is wrong with her?

Also, there is a small possibility that the "twice in one week" was really "one throw-up pile from each of the two cats" -- because I didn't actually witness the heaving.

SELF-referencing with Perl?

Hey Perl geeks, may I request your help?

You know how in PHP you can do, e.g.:

print "<FORM METHOD=\"GET\" ACTION=\"$PHP_SELF\">\n";

Is there a similar thing in Perl? Certainly it won't be called anything obvious like $PERL_SELF, now, will it?

Grrr. Argh.

Thanks in advance for any advice. I am STUPID! *head bashing into desk*