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by 1-more
1888 days ago
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> you are doing a simple integer calculation and define that the negative numbers will be used as error codes to deal with side-effects I had to come back to this because this kind of in-band signaling is how I've introduced bugs many-a-time in my old life. In FP it's so cheap to just make this function that can fail in some way return a wrapped up value that tells you what failed and how and _prevents_ you from doing math with what should be an error code (for instance). |
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