Which of these forms is least bad? https://gist.github.com/sgrif/38f5e9dc49fed32bc300d7a374a144ba …
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Yeah, that's why I ended up voting for "Mutable State". Either way, it seems like a choice that you can easily change in the future if e.g. there's a third variable you need to assign, or something. In that case, I go with mutable state without question.
I probably should have had a fourth option that was immutable bindings with explicit assignments for each to `None` in one of the branches.