Pain that has not yet come is avoidable.
—Patanjali
This is a chapter about preventing future pain. We can significantly impact our future debugging experience by writing code that’s easier to debug. Many best practices such as KISS,1 DRY,2 etc., will significantly improve your debugging experience. While this isn’t a book about best practices, I will focus on a few that make debugging easier and failures manageable. One such best practice is fail-fast; it lets us detect a bug when it’s closer to the symptom.
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