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This approach leverages the Promise.race() function to race between the original asynchronous function and a timeout promise. If the function executes within the time limit, it resolves with the function's result. Otherwise, the timeout promise rejects with "Time Limit Exceeded."
Time Complexity: O(1) — The best and worst case are consistent as it relies on how quickly the promise in fn resolves.
Space Complexity: O(1) — A constant amount of additional space is used.
1function timeLimit(fn, t) {
2 return async This code wraps the original function within an asynchronous function that introduces a race condition between the function and a timeout duration using Promise.race(). If fn completes within t milliseconds, its resolved value is returned; otherwise, it gets rejected.
This approach manually sets a timeout before invoking the asynchronous function and uses the result as a flag to determine if it has been reached. If the function attempt completes before the timeout, it clears the timeout; otherwise, it signals a reject using the timeout handler.
Time Complexity: O(1) — Performance does not vary significantly with time limit or function complexity.
Space Complexity: O(1) — Additional space is minimally affected by handling timeouts.
1function timeLimit(fn, t) {
2 return async function(...args) {
3 let timeoutId;
4 const timeoutPromise = new Promise((_, reject) => {
5 timeoutId = setTimeout(() => reject('Time Limit Exceeded'), t);
6 });
7 try {
8 const result = await Promise.race([fn(...args), timeoutPromise]);
9 clearTimeout(timeoutId);
10 return result;
11 } catch (error) {
12 clearTimeout(timeoutId);
13 throw error;
14 }
15 };
16}The code demonstrates a manual timeout mechanism coupled with Promise.race(). It introduces a timeout and clears it in finally to ensure the resource management is maintained cleanly. Upon completion of the main promise or timeout, it uses clearTimeout to avoid any further actions on the timer.
This approach utilizes Promise.race to handle the timeout. Promise.race allows us to race the original function's promise against a new promise that rejects after the specified duration t. If the original function resolves before the timeout, the new function resolves successfully. Otherwise, it rejects with a timeout error.
Time Complexity: O(1) — Relying on JavaScript's Promise system, where each promise has a negligible overhead.
Space Complexity: O(1) — Constant space used primarily for the setTimeout and the Promise itself.
1function timeLimit(fn, t) {
2 return async function(...args) {
3 return Promise.race([
4 fn(...args),
5 new Promise((_, reject) => setTimeout(() => reject('Time Limit Exceeded'), t))
6 ]);
7 };
8}The function timeLimit wraps the original asynchronous function fn. It returns an asynchronous function that races fn(...args) with a timeout promise. The timeout promise calls setTimeout, which rejects after t milliseconds. If fn(...args) resolves before the timeout, the Promise.race resolves; otherwise, it rejects.
This approach manually controls the timeout by creating a new promise that listens to both the resolution of fn and the timeout. By tracking which occurs first, we either resolve or reject appropriately. This approach sorts out through manual management of completion signals.
Time Complexity: O(1) — The complexity is based on the constant time operations, with the Promise system operation being negligible.
Space Complexity: O(1) — Uses constant space for the timeout tracking and signal flags.
1function timeLimit(fn, t) {
2 return async function(...args) {
3 return new Promise((resolve, reject) => {
4 let isResolved = false;
5
6 fn(...args)
7 .then(result => {
8 if (!isResolved) {
9 isResolved = true;
10 resolve(result);
11 }
12 })
13 .catch(err => reject(err));
14
15 setTimeout(() => {
16 if (!isResolved) {
17 isResolved = true;
18 reject('Time Limit Exceeded');
19 }
20 }, t);
21 });
22 };
23}The function timeLimit creates and returns a new promise containing the logic to handle both the execution of fn and the timeout. It uses a flag isResolved to ensure that only the first completion (either the resolution of the fn function or the setTimeout) is applied. If the fn function resolves or rejects before the timeout, it handles those outcomes. Otherwise, it eventually triggers the timeout rejection.