turn NodeJS EventEmitters into asynchronous generators that one can iterate over with for-loops
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JfEE (['dʒæfi], Generator from EventEmitter) provides a way to turn a NodeJS EventEmitter into an asynchronous generator, which is convenient in a lot of situations, such as when one wants to use an EventEmitter as the data source for pipelined data processing.
thx to https://stackoverflow.com/a/59347615/7568091
Seems to be working so far.
i.e. you create a dummy promise like in Khanh's solution so that you can wait for the first result, but then because many results might come in all at once, you push them into an array and reset the promise to wait for the result (or batch of results). It doesn't matter if this promise gets overwritten dozens of times before its ever awaited.
Then we can yield all the results at once with yield* and flush the array for the next batch.
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turn NodeJS EventEmitters into asynchronous generators that one can iterate over with for-loops
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