an example ruby class

sample_app.rb

#!/usr/bin/env ruby

class Ghost
    attr_accessor :haunted
    
    def initialize (loc = "house")
        @locations = loc
        @haunted = 1
    end
    
    def bust ()
        if rand.round() == 0
            @haunted = 0
            puts "this place is clean"
        else
            puts "hehehehe"
        end
    end
    
    def boo ()
        # multiple places
        if @locations.respond_to?("each")
            @locations.each do |location|
                puts "the call is coming from inside the #{location}"
            end    
        else
            puts "ITS BEHIND YOU IN THE #{@locations}"
        end
    end

end # define Ghost

# main()
if __FILE__ == $0
    slimer = Ghost.new()
    slimer.boo()
    slimer.bust()
    
    mman = Ghost.new('hospital')
    mman.boo()
    mman.bust()
end