How to Solve Timeout Cancellation Problem
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Timeout Cancellation
Given a function fn, an array of arguments args, and a timeout t in milliseconds, return a cancel function cancelFn. After a delay of cancelTimeMs, the returned cancel function cancelFn will be invoke...
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Understanding the Timeout Cancellation Problem
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Problem Statement
Given a function fn, an array of arguments args, and a timeout t in milliseconds, return a cancel function cancelFn. After a delay of cancelTimeMs, the returned cancel function cancelFn will be invoked. setTimeout(cancelFn, cancelTimeMs) Initially, the execution of the function fn should be delayed by t milliseconds. If, before the delay of t milliseconds, the function cancelFn is invoked, it should cancel the delayed execution of fn. Otherwise, if cancelFn is not invoked within the specified delay t, fn should be executed with the provided args as arguments.
Timeout Cancellation
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Examples
fn = (x) => x * 5, args = [2], t = 20[{"time": 20, "returned": 10}]const cancelTimeMs = 50; const cancelFn = cancellable((x) => x * 5, [2], 20); setTimeout(cancelFn, cancelTimeMs); The cancellation was scheduled to occur after a delay of cancelTimeMs (50ms), which happened after the execution of fn(2) at 20ms.
fn = (x) => x**2, args = [2], t = 100[]const cancelTimeMs = 50; const cancelFn = cancellable((x) => x**2, [2], 100); setTimeout(cancelFn, cancelTimeMs); The cancellation was scheduled to occur after a delay of cancelTimeMs (50ms), which happened before the execution of fn(2) at 100ms, resulting in fn(2) never being called.
fn = (x1, x2) => x1 * x2, args = [2,4], t = 30[{"time": 30, "returned": 8}]const cancelTimeMs = 100; const cancelFn = cancellable((x1, x2) => x1 * x2, [2,4], 30); setTimeout(cancelFn, cancelTimeMs); The cancellation was scheduled to occur after a delay of cancelTimeMs (100ms), which happened after the execution of fn(2,4) at 30ms.
Constraints
fn is a functionargs is a valid JSON array1 <= args.length <= 1020 <= t <= 100010 <= cancelTimeMs <= 1000How Interview Coder Helps with Leetcode Problems
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