Just to clarify this, I would combine KISS and LAW, such that fgrep would simply return a flat array in wantarray mode. Hardly any work on my part and it's very simple to remember. And then I'd include the example of building up a hash using fdo, if so desired.

(Gah, KISS and LAW, what is this, the Ally McBeal School of Programming?? ;-)

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Dr. Michael K. Neylon - mneylon-pm@masemware.com || "You've left the lens cap of your mind on again, Pinky" - The Brain
"I can see my house from here!"
It's not what you know, but knowing how to find it if you don't know that's important