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Refactoring: Improving the Design of Existing Code Don Roberts, John Brant, Kent Beck, Martin Fowler, William Opdyke
Publisher: Addison-Wesley Professional

Refactoring: Improving the Design of Existing Code; Design Patterns, Gang of Four; Test Driven Development: By Example; The Art of Unit Testing: With Examples in .NET. Design is hard; so improving design of existing code must be hard, as well, right? And you can be right saying that I've just read Refactoring: Improving. I think people see refactoring as a difficult process. Refactoring: Improving the Design of Existing Code, by Fowler et al, Addison-Wesley, 1999. Image by seizethedave via Flickr You may say I've been reading a lot recently. Site: SourceMaking's Refactorings Catalog. Http://lens.cos.ufrj.br/sugarloafplop/2002/download/refactoring-tutorial.pdf. Refactoring is the process of changing a software system in such a way that it does not alter the external behavior of the code yet improve its internal structure. Http://sourcemaking.com/refactoring. The basic approach involved improving your code's running time by limiting the amount of memory space the program uses.