Given a function fn, an array or arguments args, and a timeout t in milliseconds, return a cancel function cancelFn.
After a delay of t, fn should be called with args passed as parameters unless cancelFn was called first. In that case, fn should never be called.
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Example 1:
\n\n\nInput: fn = (x) => x * 5, args = [2], t = 20, cancelTime = 50\nOutput: [{"time": 20, "returned": 10}]\nExplanation: \nconst cancel = cancellable(fn, [2], 20); // fn(2) called at t=20ms\nsetTimeout(cancel, 50);\n\nthe cancelTime (50ms) is after the delay time (20ms), so fn(2) should be called at t=20ms. The value returned from fn is 10.\n\n\nExample 2:
\n\n\nInput: fn = (x) => x**2, args = [2], t = 100, cancelTime = 50\nOutput: []\nExplanation: fn(2) was never called because cancelTime (50ms) is before the delay time (100ms).\n\n\n
Example 3:
\n\n\nInput: fn = (x1, x2) => x1 * x2, args = [2,4], t = 30, cancelTime = 100\nOutput: [{"time": 30, "returned": 8}]\nExplanation: fn(2, 4) was called at t=30ms because cancelTime > t.\n\n\n\n
Constraints:
\n\nfn is a functionargs is a valid JSON array1 <= args.length <= 1020 <= t <= 100010 <= cancelT <= 1000现给定一个函数 fn ，一个参数数组 args 和一个以毫秒为单位的超时时间 t ，返回一个取消函数 cancelFn 。
在经过 t 毫秒的延迟后，除非 先调用 cancelFn ，否则 fn 应该以 args 作为参数被调用。并且在这种情况下，fn 不应该被调用。
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示例 1:
\n\n\n输入：fn = (x) => x * 5, args = [2], t = 20, cancelTime = 50\n输出：[{\"time\": 20, \"returned\": 10}]\n解释：\nconst cancel = cancellable(fn, [2], 20); // // 在 t=20ms 时调用 fn(2)\nsetTimeout(cancel, 50);\n\ncancelTime（50ms）在延迟时间（20ms）之后，所以 fn(2) 应该在 t=20ms 时调用。fn 的返回值是 10。\n\n\n示例 2：
\n\n\n输入：fn = (x) => x**2, args = [2], t = 100, cancelTime = 50\n输出：[]\n解释：fn(2) 从未被调用，因为 cancelTime（50ms）在延迟时间（100ms）之前。\n\n\n
示例 3：
\n\n\n输入：fn = (x1, x2) => x1 * x2, args = [2,4], t = 30, cancelTime = 100\n输出：[{\"time\": 30, \"returned\": 8}]\n解释：fn(2) 从未被调用，因为 cancelTime（50ms）在延迟时间（100ms）之前。\n\n\n\n\n
提示：
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