Ruby - Using Super classes

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Description

Using Super classes

Demo

class Thing  
    def initialize( aName, aDescription ) 
        @name = aName #  www .j a  v a 2  s .c o m
        @description = aDescription 
        puts("Thing.initialize: #{self.inspect}\n\n") 
    end 
                         
    def aMethod( aNewName ) 
        @name = aNewName 
        puts("Thing.aMethod: #{self.inspect}\n\n") 
    end 
end 


class Thing2 < Thing 
    def initialize( aName, aDescription )         
        super 
        @fulldescription = "This is #{@name}, which is #{@description}" 
        puts("Thing2.initialize: #{self.inspect}\n\n") 
    end 
                         
    def aMethod( aNewName, aNewDescription ) 
        super( aNewName )         
        puts("Thing2.aMethod: #{self.inspect}\n\n") 
    end 
end 

class Thing3 < Thing2 
    def initialize( aName, aDescription, aValue ) 
        super( aName, aDescription ) 
        @value = aValue 
        puts("Thing3.initialize: #{self.inspect}\n\n") 
    end 

    def aMethod( aNewName, aNewDescription, aNewValue ) 
        super( aNewName, aNewDescription ) 
        @value = aNewValue         
        puts("Thing3.aMethod: #{self.inspect}\n\n") 
    end 
end     


class Thing4 < Thing3 
    def aMethod 
        puts("Thing4.aMethod: #{self.inspect}\n\n") 
    end 
end 

class Thing5 < Thing4 
end

The Thing class has two instance variables, @name and @description.

Thing2 defines @fulldescription.

Thing3 adds another variable, @value.

These three classes each contain an initialize method.

Thing2 and Thing3, both use the super keyword in their methods.

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