Use an obscure feature of Ruby integers to efficiently store large matrices of boolean data.
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Don't be so hasty to jump straight into prototyping with code...
In this long-requested episode, guest chef Justin Weiss returns to teach you how to integrate the Whole Value pattern into Rails applications.
Ruby's backtick operator is great for quick-and-dirty output capture, but what do you use when you need more power?
Treat your objects as disposable to cut down on mutable-state-based bugs.
Learn the nuances of Ruby's Process.wait, Process.wait2, and Process.waitall system calls, and how to choose between them based on your use case.
Don't let your Ruby subprocesses become zombies!
Learn a robust, cross-platform way to throw away unwanted output in Ruby programs.
Learn the twin pillars at the root of the UNIX process-spawning architecture!