Web Reference: Singleton pattern in Ruby. Full code example in Ruby with detailed comments and explanation. Singleton is a creational design pattern, which ensures that only one object of its kind exists and provides a single point of access to it for any other code. Aug 3, 2025 · Singleton is a creational design pattern. it restricts the instantiation of a class to one single instance. Singleton pattern ensures that a class has only one instance. The idea of the singleton pattern is that you want a class with only one instance. Here’s how: 1. You make the newmethod private 2. You define a class method named instancethat returns the unique instance for the class Because this is a popular design pattern, the Ruby standard library comes with a Singletonmodule you can include in any class. It l...
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