ScriptdrillRetry a failing call
A JavaScript exercise from Scriptdrill. Solve it with a code editor in your browser that runs your function against example and hidden tests, and it is checked the moment you submit.
The task
Call `fn()` until it succeeds, at most `attempts` times, and resolve with its result. `fn` may return a Promise or a plain value, and it may throw or reject. If every attempt fails, reject with the error from the last attempt.
What this exercise teaches
await inside try catches both a rejected Promise and an error thrown synchronously by fn. Returning inside the loop stops at the first success, and the error kept from the final attempt is the one thrown.
A hint if you get stuck
An `async` function with a `for` loop and `try { return await fn(); } catch (e) { last = e; }` covers sync throws and rejections alike. Throw `last` after the loop.
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