g2701_2800.s2725_interval_cancellation.solution.ts Maven / Gradle / Ivy

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// #Easy #2023_09_19_Time_51_ms_(98.87%)_Space_43.3_MB_(30.92%)

function cancellable(fn: Function, args: any[], t: number): Function {
    fn(...args)
    const timer = setInterval(() => {
        fn(...args)
    }, t)

    return () => clearTimeout(timer)
}

/*
 *  const result = []
 *
 *  const fn = (x) => x * 2
 *  const args = [4], t = 20, cancelT = 110
 *
 *  const start = performance.now()
 *
 *  const log = (...argsArr) => {
 *      const diff = Math.floor(performance.now() - start)
 *      result.push({"time": diff, "returned": fn(...argsArr)})
 *  }
 *
 *  const cancel = cancellable(log, args, t);
 *
 *  setTimeout(() => {
 *     cancel()
 *  }, cancelT)
 *
 *  setTimeout(() => {
 *    console.log(result)  // [
 *                         //      {"time":0,"returned":8},
 *                         //      {"time":20,"returned":8},
 *                         //      {"time":40,"returned":8},
 *                         //      {"time":60,"returned":8},
 *                         //      {"time":80,"returned":8},
 *                         //      {"time":100,"returned":8}
 *                         //  ]
 *  }, cancelT + t + 15)
 */

export { cancellable }