Your comment about list comprehensions reminded me of an old, interesting Perl book, "High-Order Perl", which explores functional programming techniques in Perl

Your comment about list comprehensions reminded me of an old, interesting Perl book, "High-Order Perl", which explores functional programming techniques in Perl. One of the chapters implements a lazy map - which, turns out, is actually quite easy to implement in a few loc, since Perl supports closures and high-order, first-class functions. http://hop.perl.plover.com/ http://hop.perl.plover.com/