> there's no acceptable way to pass a function body to another in Python. There are sentences which are telling a huge incompetence about the person using these. This sounds the same story to me as "We used tech X, but X is shit/can't do something so we switched to Y, and Y is awesome and fast." Where the person switching was just incompetent with X but it would have been perfectly solvable and they just do a totally…
I really like chaining Promises in JavaScript. The Python way to do this doesn't seem as powerful (what if you want to inject a parallel set of async operations at some point in the chain?): https://stackoverflow.com/questions/43325501/how-do-i-write-... - JS also supports async/await but the advantage of JS is that you can return promises (or parallel combinations of multiple promises) from inside promises so any link in the promise chain can essentially inject new links in the chain in its own place (so the chain can change dynamically based on the results of previous async operations).
You can build really complex dynamic async chains in JS very easily because of this. It's hard to explain why it's so nice until you try it.
In JS, I can do something like:
Promise.resolve().then(() => {
let innerPromiseChain = serialOperation1()
.then(serialOperation2);
if (somethingIsTrue) {
// Only inject serialOperation3 at the end of the
// innerPromiseChain if somethingIsTrue
return innerPromiseChain.then(serialOperation3);
}
// else return the inner chain without serialOperation3
return innerPromiseChain;
// resultOfLastSerialOperation could be the result of
// either serialOperation2 or serialOperation3 depending
// on the value of somethingIsTrue
// parallelOperation1 and parallelOperation2 will be
// executed in parallel.
return Promise.all(parallelOperation1(), parallelOperation2());
// This will be called once the previous parallel
// operations have both finished (therefore the
// whole chain has been processed).