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Define and use a class
this example from a Well House Consultants training course
More on this [link]

This example is described in the following article(s):
   • Clear, concise examples - Ruby classes and objects. - [link]

Source code: obrub1.rb Module: R102
# Define and use a class

class Train
        def initialize (origin, length, stockType)
                @origin = origin
                @mylength = length # @ => variable within the current (train) object
                @mystock = stockType
        end
        def getseats
                return @mylength * 73 # @ - so the variable within the current (train) object
        end
        def getstart
                return @origin
        end
        def strengthen (extra)
                @mylength = @mylength + extra
        end
end

# ------------ Here is my test application!
# Write this first to get the API spec right!

# set up some trains ... "call the constructor" to do so
morning = Train.new "Gloucester",3,"150"
evening = Train.new "Cheltenham Spa",2,"158"

puts morning # demo to show it's an object of class train
puts evening

morning.strengthen 2

amseats = morning.getseats
pmseats = evening.getseats

puts "We can carry away #{amseats} on the train from #{morning.getstart} at 06:38"
puts "We can carry away #{pmseats} on the train from #{evening.getstart} at 19:11"

__END__

Sample Output

WomanWithCat:r102 grahamellis$ ruby obrub1.rb
#<Train:0x007fde2a8813b8>
#<Train:0x007fde2a881340>
We can carry away 365 on the train from Gloucester at 06:38
We can carry away 146 on the train from Cheltenham Spa at 19:11
WomanWithCat:r102 grahamellis$


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