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Last year, my team was knee-deep in a project for with strict constraints on working environment. No GitHub, GitLab, or Bitbucket to set up version control. Just a lot of versions of the same code and a lot of paranoia & frustrations. Read more
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If you’ve ever used None to represent “missing” or “default” values in Python, you’ve likely run into a subtle problem: what if None is a valid input for your function or data structure? For example, a caching function might need to distinguish between a cached None value and the absence of a cached value altogether. Using None for both cases creates ambiguity and bugs that are hard to trace.
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