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Define class, create and use instances of it
this example from a Well House Consultants training course
More on this [link]

This example is described in the following article(s):
   • Learning to program in Ruby - examples of the programming basics - [link]
   • Ruby - the second rung of learning the language - [link]

Source code: d2.10 Module: R102
# Define class, create and use instances of it

class Animal
        # Special case - the initialize method is called when you
        # set up an Animal with Animal.new ("The Constructor")
        def initialize(name,age,human_factor)
                # @ indicates there is a variable of this name foe
                # each and every animal
                @its_called = name
                @its_age = age
                @its_factor = human_factor
        def getname
                return @its_called
        def getage
                return @its_age
        def geteffage
                return @its_age * @its_factor

def about(which,piece_text)
        print "The #{piece_text} is known as #{which.getname}\n"
        print "The #{piece_text} is #{which.getage} years old\n"
        print "The #{piece_text} is (in human terms) #{which.geteffage} years old\n"

cat1 = Animal.new("Ronnie",5,6)
cat2 = Animal.new("Charlie",12,6)
hound = Animal.new("Gypsy",2,7)

about(cat1,"Katy's Cat")
about(cat2,"Graham's Cat")
about(hound,"Lisa's Dog")

#* Sample Output
#* WomanWithCat:r102 grahamellis$ ruby d2.10
#* The Katy's Cat is known as Ronnie
#* The Katy's Cat is 5 years old
#* The Katy's Cat is (in human terms) 30 years old
#* The Graham's Cat is known as Charlie
#* The Graham's Cat is 12 years old
#* The Graham's Cat is (in human terms) 72 years old
#* The Lisa's Dog is known as Gypsy
#* The Lisa's Dog is 2 years old
#* The Lisa's Dog is (in human ter
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