Fitzpatrick: Back when I was doing Perl-even for people that knew Perl really well-I would recommend MJD's Higher-Order Per!. The book is really fun in that it starts somewhat simple and you're like, "Yeah, yeah, I know what a closure is." And then it just continues to fuck with your head. By the end of the book, you're just blown away.
Peter Seibel, Coders at Work
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