Advanced Classes checkpoint

_notes

- Parent classes should be as generic as possible.
- Super calls the parent's initilize method!! (hope this is true!!).. and the child (calling super) can pass in whatever parameters make sense within the context of that child initialize method!!!

_output

```Bloc output - Inheritance
```

 Shape can_fit? should tell if a shape can fit inside another shape
 Shape color should be able to get and set color
 Rectangle initialize should take width, height
 Rectangle initialize should be able to set a color if given
 Rectangle initialize should be able to set the default color to Red
 Rectangle area should return correct area for large rectangle
 Rectangle area should return correct area for a small rectangle
 Square initialize should only take a side and color
 Square initialize should set a default color
 Square area should return right area
 Circle initialize should only take radius and color
 Circle initialize should set a default color
 Circle initialize should not respond to width or height
 Circle area returns the area of a small circle
 Circle area returns the area of a large circle

_questions

1. I'm a little confused on how to use the !(bang) in Ruby. For instance in this class, how is #{other.name}! working?:
  class Animal
  attr_accessor :name

  def initialize(name)
    @name = name
  end

  def eat(other)
    puts "#{@name} ate #{other.name}! #{self.noise}"
  end
end

2.In the Shape class example:
class Shape
attr_accessor :color
  def initialize(color = nil)
    @color = color || "Red"
  end
  
  def can_fit?(shapeInstance)
    if self.area >= shapeInstance.area
      true
    else
      false 
    end
  end
end

...why are we setting color = nil as the initialize argument?

3. What would really really really help me out would be to have an editor that caught typos - I just killed 2 hrs. because I misspelled something :(  ...help :)  for instance - I spelled "initialize" - "initilize"

Advanced Classes checkpoint

#Inheritance

class Shape
attr_accessor :color
  def initialize(color = nil)
    @color = color || "Red"
  end
  
  def can_fit?(shapeInstance)
    if self.area >= shapeInstance.area
      true
    else
      false 
    end
  end
end

class Rectangle < Shape
attr_accessor :width, :height
  def initialize(width, height, color = nil)
    @width, @height = width, height
    super(color)
  end 
  def area
    p @width * @height
  end
end

class Square < Rectangle
  def initialize(side, color = nil)
    super(side, side, color)
  end
end

class Circle < Shape
  attr_accessor :radius
  def initialize(radius, color = nil)
    @radius = radius
    super(color)
  end
  def area
    p Math::PI * (@radius * @radius)
  end
end