promise time limit leetcode 2637 javascript 30 day challenge

certainly! the leetcode problem 2637 titled "promise time limit" involves creating a function that takes a promise and a time limit. if the promise resolves within the time limit, it should return the resolved value. if it doesn't, it should reject with a timeout error.

problem statement

you are given a function called `promisetimelimit` that takes in two parameters: a promise (which is an async function) and a time limit (in milliseconds). your task is to return a promise that resolves with the value of the input promise if it resolves within the specified time limit. if the input promise does not resolve within the time limit, you should reject the promise with an error message indicating a timeout.

example

explanation of the code

1. **create a new promise**: we start by creating a new promise inside the `promisetimelimit` function. this promise will eventually resolve or reject based on the input promise and the time limit.

2. **set a timeout**: we set a timeout using `settimeout`, which will reject the promise with the message "promise timed out" if it exceeds the specified limit.

3. **handle the original promise**:
- when the original promise resolves, we clear the timeout using `cleartimeout(timer)` to prevent it from rejecting the outer promise. then we resolve our promise with the value obtained from the original promise.
- if the original promise rejects, we also clear the timeout and reject our promise with the error from the original promise.

4. **return the new promise**: finally, the function returns the new promise that wraps the behavior of the original promise with the time limit.

usage example

here's how you can use the `promisetimelimit` function:

summary

the `promisetimelimit` function is a useful utility to handle promises with a time constraint. it ensures that your application can gracefully handle promises that may take too long to resolve, thus preventing potential hangs or unresponsiveness in your application.

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Promise
time limit
LeetCode
2637
JavaScript
30 day challenge
asynchronous
coding challenge
web development
programming
concurrency
promise handling
time management
algorithm
performance optimization