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Symmetry
A blog about software development and programming.
That can get you from the report of the bug to the actual flaw in the code in a few minutes, with a fairly low cognitive effort. It takes a lot of cognitive effort to hypothesize about any sort of behavior, and then you have to focus in on as little as possible, just to figure out how to alter it in a way that hopefully is better. Spending the time to find and enhance symmetry saves a huge amount of grief later with quality issues.
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