Greetings, I have enjoyed using the `await` keyword tremendously in async code. One point I notice in using it is that it is ideal in terms of clarity and composability but limited in a sense to sequential composition. That is, I cannot easily use `await` (by itself) to do parallel calculations.
A few times, I have myself hit a bug where I return (without thinking) an Array of Promise only to find that none will resolve using `await` on the Array. I noticed others have similar bugs. [1,2] I frequently wind up wrapping them in one of two ways: a) occasionally a for loop that awaits each in sequence, but b) more often a `Promise.all`. I think the current `await` syntax makes every kind of sequential composition quite simple to read, write, and maintain, but the fact that we have to introduce `Promise.all` for each case of parallel (overlapping) execution seems to be a common cause of bugs and a minor aesthetic issue to me as well as perhaps maintenance. It occurs to me that for my cases, and indeed perhaps others, a useful rule would be that all `await` on `Array` behave as if the Array were wrapped in `Promise.all`. Then we can have a nice parallel composition syntax built into the language with the keyword using Array and lists can become idiomatic and concise parallel composition operators. I feel like this could improve the readability, power, and real time responsiveness of the language without necessarily sacrificing quality nor clarity. await on an Array value v acts as await Promise.all(v) Weighing against this idea seems to be the usual: operator tricks are unsearchable via keywords compared to `Promise.all`. So there is a style question however with the latest addition of the great new optional-chaining and pipeline ideas I thought it might be a good time to give this idea a try. What does the group think about this await enhancement proposal? Best regards, Rudi Cilibrasi [1]: https://stackoverflow.com/questions/38694958/javascript-async-await-for-promises-inside-array-map [2]: https://stackoverflow.com/questions/37360567/how-do-i-await-a-list-of-promises-in-javascript-typescript -- Happy to Code with Integrity : Software Engineering Code of Ethics and Professional Practice <http://www.acm.org/about/about/se-code>
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