RVM is a nice tool that manages multiple installations of Ruby, JRuby, gems, etc. It's very useful if you're working on both Ruby and JRuby projects.
http://rvm.beginrescueend.com/
Citrus is a fun parser generator for Ruby. It lets you mix small bits of Ruby code in with your parser grammar.
http://mjijackson.com/citrus/
Invoking a method with a ampersand-parameter:
http://blog.jayfields.com/2007/01/ruby-invoking-method-with.html
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Topic revision: r2 - 15 Sep 2010 - TobyCabot
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