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    Are they common? I'm producing my fair share of bugs, but off-by-one errors are very rarely among them. Perhaps because I mostly use Python, i.e. use iterators instead of juggling with indices? (And: What does that tell us? ;) ) Commented Feb 2, 2011 at 18:16
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    The less you have to think about, the more productive you are? Commented Feb 2, 2011 at 18:20
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    @delnan: I agree. Off-by-one errors are usually the first to be caught when I'm coding (before I even move to an official "testing phase"). Commented Feb 2, 2011 at 18:24
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    I almost answered the previous question by mistake... Commented Feb 2, 2011 at 19:07
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    > What can we do to prevent falling prey to the off by one errors? Use an iterator. Commented Feb 3, 2011 at 0:14