ScriptdrillRun tasks in sequence
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
`tasks` is an array of functions; each returns a Promise or a plain value. Run them one at a time, in order, starting each only after the previous one has finished, and resolve with the array of their results. If a task fails, reject and do not start the remaining tasks. Tests run on a fake clock: `setTimeout`, `clearTimeout` and `Date.now` are simulated, so waits are instant and exact.
What this exercise teaches
await inside a for...of loop pauses the loop until each task is done, so tasks never overlap and the total time is the sum of their times. A rejection throws out of the loop before the next task starts.
A hint if you get stuck
In an `async` function, loop with `for...of` and `await task()` inside the loop. `Promise.all(tasks.map(...))` would start them all at once.
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