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On debugging

My favorite advice on debugging is from Professor Norman Matloff:

Finding your bug is a process of confirming the many things that you believe are true – until you find one that is not true.


I would add to this my own observation:

You are not truly “debugging” until you (temporarily) remove all desire to fix the problem. Investigation must be entirely devoted to finding and seeing the problem.

Categories: Opinion Tutorials

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Data Scientist and trainer at Win Vector LLC. One of the authors of Practical Data Science with R.