I concur that Higher Order Perl is a great resource and that learning to program in a suitably different language like Haskell can also be very useful.

I've found a nice little book that works through lots of Computer Science/Discrete Math stuff while introducing Haskell. It's The Haskell Road to Logic, Maths and Programming by Doets and van Eijk. A very nice little intro to functional programming and haskell, and a very nice companion to HOP, IMHO. Sort of kills two birds with one stone (intro to discrete math, functional programming, and another programming language)... wait that's three birds... oh well!

In reply to Re^3: Recommendations for a self-taught Perl programmer by geekondemand
in thread Recommendations for a self-taught Perl programmer by silent11

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