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Not everyone has the possibility of working on Greenfield projects or doing TDD or BDD. Many of us often end up having to work with legacy code bases that have little notion of what SOLID design principles are and unit tests are non-existent.
It can be daunting to have to maintain these types of systems. However, with a little bit of effort, we can try and make the best of the situation. By applying a series of patterns, techniques and principles, we can gradually refactor legacy systems to produce a better, friendlier and more sustainable design. Come and find out how!
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