Hidden Gems of Ruby 1.9
summary
Title promises gems but delivers specifics: Ruby 1.9 / Ruby 192 features in the standard library rather than third‑party gems, concrete examples and caveats. Shows standard library only, demonstrates minitest behaviors — minitest: skip, refute, randomized seed and spec-like syntax and test timing/seed debugging; inspects memory and VM with objectspace methods and memsize_of; uses fiddle wrapping lib ffi and shows fiddle closures testable in Ruby; uses Psych for evented and streaming YAML/JSON; shows Coverage.start/results output; notes JRuby availability caveats.
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