Чем отличается Promise.any от Promise.race?
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* The function takes an array of promises (assumed non-empty) and returns a promise. * If any of the passed promises resolve (successfully complete), then the returned promise resolves with that value. * If multiple promises are successfully fulfilled, then the returned promise resolves * with the first successful value, regardless of the order of promises in the array. * If all passed promises reject, then the returned promise rejects with an AggregateError, which groups all errors, considering the order of promises. * An AggregateError can be created as follows: new AggregateError(errors, 'No Promise in any was resolved') function any(promises) { // your code here }
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Why can't errors in the 'any' function be added via push, and why should they be assigned by index?
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What will happen if no promises are passed to the sumPromises function?
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What is the difference between Promise.all and Promise.allSettled?
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What happens if you pass an empty list of functions to compose?
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What will happen if one of the promises is rejected in the sumPromises function?
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Implement a function sumPromises that takes promises as arguments and returns the sum of their resolved results. The function can accept any number of arguments. You may use any Promise APIs.
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Implement a function isMonotonic that takes an array of numbers and determines if it is monotonic (non-increasing or non-decreasing). Return true if it is monotonic, otherwise false. Implement with linear complexity O(n).
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Why might the apply method be needed in the implementation of runOnce?
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Implement a function compose that takes a variable number of functions and returns a new function. The result of each function is passed to the next.
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Implement a runOnce wrapper function that takes a function and returns a new function. The new function can only be called once, all subsequent calls return undefined. The wrapped function can take arguments and return a result.
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Do you know about the pipe pattern? How does it differ from compose?
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Which option will be faster: using Promise.all or using a loop with await at each step? Why?
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Why is the rejectedCount counter needed? Why can't we just look at the length of the errors array?
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