Ruby Constructors

•  1. Ruby supports constructors.
•  2. They are declared with the method initialize.
•  3. Initialize method is called automatically when the object is created.

Example:

class Cons
    def initialize(name,email,password)
      @name=name
      @email=email
      @password=password
    end
  end

• In this example we have provided the initialize method with three arguments i.e name , email and password.
•   Then we created the instance variables and assigned them with the values of name ,email and password.
•   The initialize method is called automatically when we create an object of Cons class i.e Cons.new.

Setter And Getter Methods:

These methods can be automatically created by using the attr_accessor method or can be created manually.

Example:

class Student
  attr_accessor :name , :percentage
end

  stu = Student.new

  stu.percentage = 60%
  =>60%

  stu.name = "Rahul"
  =>"Rahul"

  puts stu.name , stu.percentage

Output:
  Rahul
  60%

We can also write this code by definig the setter and getter methods on our own.

Example:

class Student
    def name          #getter method
      @name
    end

    def name = (name)   #setter method
      @name = name
    end

    def age
      @percentage
    end

    def percentage = (percentage)
      @percentage
    end
end