Web Reference: Jul 3, 2020 · These kinds of methods belong to the singleton class or eigenclass and are available exclusively for a single object, unlike the other methods which are available for all the instances of the class. Singleton methods are often used for elements of a graphic user interface (GUI), where different actions need to be taken when different buttons are pressed. Singleton methods are not unique to ruby, as they appear in CLOS, Dylan, etc. 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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