Thanks, that cleared it up a bit for me. A few months back I wrote this article on Callback Hell but I didn’t fully understand at that time which came first async/coroutine/ etc. At work now we use yield / call / Node.js and recently I discovered you can even pack them into an array and then call. This helps when you need to make sure that several calls are finished executing regardless of their order before moving on to the next call.

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