Philosophy

Focus is on the programmer rather than the machine. i.e. maximize programmer efficiency.
Principle of least astonishment - behave in such a way that minimized the confusion of experienced Ruby programmers.
Ruby is an object-oriented scripting language.
Multi paradigm :
- Scripting : automate tasks within some environment
- Imperative : traditional control structures
- Object oriented : everything is an object
- Functional : Also exists. Computation proceeds via the evaluation of functions that depend only on their input, not program state.

Classes and Inheritance

class MyClass
   @boo #instance variable
   def my_method
     @foo = 2 #instance variable
   end
end

mc = MyClass.new #create a myclass object
mc.my_method     #calls the method
mc.boo           #error, not allowed to access variable