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I find unit testing vital.
Several times I have tried the TDD but given up on it as sitting down with a piece of paper and drawing out a few diagrams first always seem more productive. As so many advocate the TDD I will keep trying.
I looked at this http://xprogramming.com/xpmag/sudoku5 (the last article of 5) but this seemed to highlight the difficulty I have with the approach.
Are there any good sample walkthroughs on the web based on a simple easily defined problem? This way I could try the approach again myself then compare with the sample. The sample would need to explain the thinking behind the approach.
I prefer to code in C# but have used Java.