如何使用Ruby中的Singleton设计模式创建一个Class？ [英] How do I create a Class using the Singleton Design Pattern in Ruby?

问题描述

单例模式是用于将类的实例化限制为一个对象实例的设计模式。虽然我知道如何用C ++和Java编写单例模式，但我想知道有没有人知道如何在Ruby中实现它？

The singleton pattern is a design pattern that is used to restrict instantiation of a class to one object instance. Although I know how to code the singleton pattern in C++ and Java, I was wondering if anyone know how to implement it in Ruby?

推荐答案

p>其实上面的答案是不完全正确的。

Actually, the above answer was not completely correct.

require 'singleton'

class Example
  include Singleton
end

您还需要包含require'singleton'陈述。

You also need to include the require 'singleton' statement.

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