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This approach leverages JavaScript's built-in setTimeout and clearTimeout functions. We schedule a timeout to execute the function fn after t milliseconds, and we return a cancelFn that, when called, cancels this scheduled timeout.
In C, without a standard set of functions for asynchronous timeouts, it's less about algorithmic complexity and more about the overhead of managing threads, which varies based on the implementation details.
1/* Similar to C, C++ requires external libraries or platform-specific APIs for handling async behavior akin to JavaScript setTimeout. Common solutions involve threads or async libraries. */Like C, C++ does not natively provide timeout and cancellation in its standard library without involving threading or asynchronous library support.
This alternative approach involves using Promises to manage asynchronous execution and potential cancelation. By wrapping the setTimeout within a Promise, we can have more control over its execution and cancelation by managing the Promise lifecycle.
Time Complexity and space complexity would depend on the specific threading mechanism and the use of synchronization primitives.
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This JavaScript approach utilizes Promise for handling asynchronous calls and providing a cancelation mechanism. The promise resolves either after the intended delay executing the function or canceling the timeout and resolving with a message if canceled.