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class MyClass                   #class declaration, notice the capital letter as this is a Constant
    attr_reader :readOnlyProperty, …        #shortcut to save writing a property getter
    attr_writer :writeOnlyProperty, …       #shortcut to save writing a property setter
    attr_accessor :readWriteProperty, …     #shortcut to save writing a property setter and getter

    def initialize              #class initialization method
        @instanceVar=1          #instance variable, available throughout an instance of the class.
        @readOnlyProperty=2    
        @writeOnlyProperty=3
        @readWriteProperty=4
    end

    def instanceVar             #property getter
        @instanceVar            #return the value of the instance variable
    end

    def instanceVar=(value)     #property setter
        @instanceVar = value    # set the instance variable to the passed in value
    end

    def instanceMethod          #instance method, available to all instances, this is the instance
    end

    def MyClass.classMethod     #class method, only accessible via the class, this is the class
    end

    CLASSCONSTANT = ["a","b","c"] #constant defined by the class accessible by all instances note its in uppercase

end