On a project at work we've started to use environment variables to toggle features on and off in the application. We're just getting into feature toggling, and this seemed to be the best lightest-weight way to get started.
Since environment variables are strings, and some of our values will be objects of other types, we needed a way to convert these strings into Ruby objects. A preliminary search yielded many options that utilized complicated regular expressions and other gymnastics. There had to be a better way.
YAML. It supports serializing the types we needed:
irb(main):001:0> require 'yaml' => true irb(main):002:0> YAML.load('true') => true irb(main):003:0> YAML.load('108') => 108 irb(main):004:0> YAML.load('just a string') => "just a string"