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From: Josh Cheek on 9 Aug 2010 00:56 [Note: parts of this message were removed to make it a legal post.] Thought you guys might enjoy "Expressive Languages for the JVM", a Google Tech Talk by Charles Oliver Nutter, from Engine Yard. http://www.youtube.com/watch?v=WlsD2FiBIbg The first half is on JRuby and talks about threading, JVM optimizations, scaling Rails, had a couple demos, and gives a Ruboto demo (Jruby on Android). The second half talks about Mirah (the language formerly known as Duby). I don't have experience with it, but it seems to be Java with Ruby based syntax (I think they actually use Ruby's parser) and some added features. But unlike JRuby, which requires you to load and run additional files, Mirah compiles to pure Java / Bytecode, so you don't need to carry anything around with you, like the JRuby runtime. In other words, you get Java performance and portability, but ruby aesthetics, and some additions like closures, mixins, and optional arguments. They also showed an Android app written in Mirah, and a web framework for App Engine called dubious that is very very strongly patterned after Rails.
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