Ruby Singleton Pattern
Singleton is perhaps the most hated of all programming patterns. You can read some of the reasons for this in Why Singletons are Evil. But, I think it has some good usages. I will start by describing what a singleton pattern is, walk through different ways of implementing it in Ruby, and point to how it’s used in Rails. Singleton is a design pattern that restricts instantiation of a class to only
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Watch: Writing a Play Card Game with Ruby? — SitePoint
