How to resolve the algorithm Singleton step by step in the Ruby programming language
How to resolve the algorithm Singleton step by step in the Ruby programming language
Table of Contents
Problem Statement
A Global Singleton is a class of which only one instance exists within a program. Any attempt to use non-static members of the class involves performing operations on this one instance.
Let's start with the solution:
Step by Step solution about How to resolve the algorithm Singleton step by step in the Ruby programming language
The code is creating a Singleton class in Ruby using the Singleton module.
A Singleton class is a class that can only be instantiated once, and it provides a global point of access to that instance.
In this case, the class MySingleton
is defined as a Singleton by including the Singleton
module, which provides the instance
method.
The instance
method is used to get the instance of the Singleton class, and if the instance has not been created yet, it will create it.
In the example, two variables, a
and b
, are assigned to the instance of the MySingleton
class.
Then, the equal?
method is used to check if the two variables are equal, and it outputs "true" because they are both references to the same instance of the MySingleton
class.
Source code in the ruby programming language
require 'singleton'
class MySingleton
include Singleton
# constructor and/or methods go here
end
a = MySingleton.instance # instance is only created the first time it is requested
b = MySingleton.instance
puts a.equal?(b) # outputs "true"
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