If you focus on refactoring the system under development, and do only the minimal amount of refactoring of tests, your system will be harder to change than it needs to be. You put a lot of effort into giving your system the best design you can; if you neglect to update your tests, it will leave your system harder to change, riskier to extend, more difficult...   Read Article.

There are many issues that make application integration complicated. This chapter from "Enterprise Integration Patterns" explores multiple integration approaches that can help overcome these challenges. n...   Read Article.

The Facade pattern puts up a new interface mdash; that is, a facade mdash; in front of the original system. In this sample book chapter, you'll learn when to apply it, and how to do so....   Read Article.

Refactoring software by hand can be a real pain. So why not just automate the process? In this chapter, Joshua Kerievsky explains the whys and hows of refactoring, and why you shouldn't trust that automated refactoring program....   Read Article.

This is 218 page pdf book with code samples. Design Patterns is a catalog of 23 generally useful patterns forwriting object-oriented software. It is written as a catalog with short examples and substantial discussions of how the patterns can be constructed and applied. Most of its examples are in C++, with a few in Smalltalk. The Smalltalk Companion...   Read Article.

Data Structures and Algorithms with Object-Oriented Design Patterns in Java: This book was motivated by my experience in teaching the course ECE 250: Algorithms and Data Structures in the Computer Engineering program at the University of Waterloo. I have observed that the advent of object-oriented methods and the emergence of object-oriented design...   Read Article.

Data Structures and Algorithms with Object-Oriented Design Patterns in C#: This book was motivated by my experience in teaching the course ECE 250: Algorithms and Data Structures in the Computer Engineering program at the University of Waterloo. I have observed that the advent of object-oriented methods and the emergence of object-oriented design patterns...   Read Article.

Data Structures and Algorithms with Object-Oriented Design Patterns in Python: This book was motivated by my experience in teaching the course ECE 250: Algorithms and Data Structures in the Computer Engineering program at the University of Waterloo. I have observed that the advent of object-oriented methods and the emergence of object-oriented design...   Read Article.

Data Structures and Algorithms with Object-Oriented Design Patterns in Ruby: This book was motivated by my experience in teaching the course ECE 250: Algorithms and Data Structures in the Computer Engineering program at the University of Waterloo. I have observed that the advent of object-oriented methods and the emergence of object-oriented design...   Read Article.