Imagine you were flying out of New York and you stopped a cab. What would you tell the driver right after you are in the cab? Will you say “Can you go faster, I have to catch a flight” or will you say “Can you go faster, I have to catch an airport?”

REPLACE TYPE CODE WITH SUBCLASSES

As you start working with more complex system you will find yourself end up with classes which has type-code and then logic around it. Like the following example

These are some of my notes I took while reading Martin Fowler’s Refactoring. Improving THE Design of Existing Code. It will be a multi part series and will cover a few basic refactoring techniques.