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by tumbling_stone 4048 days ago
The most comprehensive and foolproof way is to grab the spec, read the algorithm and fiddle around a day. Sadly this is the only way of fully understand promises, promises already put a lot of cognitive load on your brain when you're using them, so having any other abstractions of your own (for remembering how promises work) is bad idea. IMO you're better off investing a large continuous block of time for understanding promises rather than reading some article here and there.