Indeed, I must say that I am much
more interested in the //= operator than in threads. Defined-or is useful even for small, single-threaded applications, such as the ones I write every day. Sure, it's mostly syntax sugar (mostly), but it's very *nice* syntax sugar (and, yeah, there are also those few instances where you really don't want to evaluate the left side twice, but that's more of a special case even than threads).
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