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#!/usr/bin/ruby
class Example
VAR1 = 100
VAR2 = 200
def show
puts "Value of first Constant is #{VAR1}"
puts "Value of second Constant is #{VAR2}"
end
end
# Create Objects
object = Example.new()
object.show
#!/usr/bin/ruby
$global_variable = 10
class Class1
def print_global
puts "Global variable in Class1 is #$global_variable"
end
end
class Class2
def print_global
puts "Global variable in Class2 is #$global_variable"
end
end
class1obj = Class1.new
class1obj.print_global
class2obj = Class2.new
class2obj.print_global
#!/usr/bin/ruby -w
# define a class
class Box
attr_accessor :width, :height
# constructor method
def initialize(w,h)
@width, @height = w, h
end
# instance method
def getArea
@width * @height
end
end
# create an object using new
box1 = Box.new(10, 20)
# create another object using allocate
box2 = Box.allocate
# call instance method using box1
a = box1.getArea()
puts "Area of the box is : #{a}"
# call instance method using box2
a = box2.getArea()
puts "Area of the box is : #{a}"
#!/usr/bin/ruby -w
# define a class
class Box
# constructor method
def initialize(w,h)
@width, @height = w, h
end
# accessor methods
def getWidth
@width
end
def getHeight
@height
end
# setter methods
def setWidth=(value)
@width = value
end
def setHeight=(value)
@height = value
end
end
# create an object
box = Box.new(10, 20)
# let us freez this object
box.freeze
if( box.frozen? )
puts "Box object is frozen object"
else
puts "Box object is normal object"
end
# now try using setter methods
box.setWidth = 30
box.setHeight = 50
# use accessor methods
x = box.getWidth()
y = box.getHeight()
puts "Width of the box is : #{x}"
puts "Height of the box is : #{y}"
#!/usr/bin/ruby -w
# define a class
class Box
# constructor method
def initialize(w,h)
@width, @height = w, h
end
# instance method
def getArea
@width * @height
end
end
# define a subclass
class BigBox < Box
# change existing getArea method as follows
def getArea
@area = @width * @height
puts "Big box area is : #@area"
end
end
# create an object
box = BigBox.new(10, 20)
# print the area using overriden method.
box.getArea()
#!/usr/bin/ruby -w
# define a class
class Box
# constructor method
def initialize(w,h)
@width, @height = w, h
end
# instance method
def getArea
@width * @height
end
end
# define a subclass
class BigBox < Box
# add a new instance method
def printArea
@area = @width * @height
puts "Big box area is : #@area"
end
end
# create an object
box = BigBox.new(10, 20)
# print the area
box.printArea()