This article shows off a Ruby gem which has the power to overwrite a Ruby binary in memory while it is running to allow your code to execute in place of internal VM functions. This is useful if you’d like to hook all object allocation functions to build a memory profiler.

The recent release of JRuby 1.4 already ships as as an OSGi bundle. I’ve never mixed Ruby with Java before, so I took it as an opportunity to learn more. This blog explains how to write a Twitter Search UI for Eclipse, using Ruby’s http and JSON libraries to talk to twitter.com. Read on to learn how to install JRuby on your system, make it work with Equinox and mix Java with Ruby code.