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Chapter 15 The Nine Theorems of Debugging
Readable code is debuggable code.
- The only thing worse than getting an error message is not getting an error message.
- You must always be 100% sure that the code you are running
is the code you think you are running.
- Error messages tell you where the problem was discovered,
not where it was caused.
- The best kind of debugging is the kind you don’t have to do.
- The worst bugs aren’t in your code; they are in your head.
- The best way to avoid a bug is to make it impossible.
- Error messages sometimes tell you what’s wrong, but they
seldom tell you what to do (and when they try, they’re usually
- Finding a hard bug requires reading, running, ruminating,
and sometimes retreating. If you get stuck on one of these
activities, try the others.
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