leetcode-problemset/leetcode-cn/originData/execute-cancellable-function-with-delay.json

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        "question": {
            "questionId": "2821",
            "questionFrontendId": "2715",
            "categoryTitle": "JavaScript",
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            "title": "Execute Cancellable Function With Delay",
            "titleSlug": "execute-cancellable-function-with-delay",
            "content": "<p>Given a function <code>fn</code>, an array or arguments&nbsp;<code>args</code>, and a timeout&nbsp;<code>t</code>&nbsp;in milliseconds, return a cancel function <code>cancelFn</code>.</p>\n\n<p>After a delay of&nbsp;<code>t</code>,&nbsp;<code>fn</code>&nbsp;should be called with <code>args</code> passed as parameters <strong>unless</strong> <code>cancelFn</code> was called first. In that case,&nbsp;<code>fn</code> should never be called.</p>\n\n<p>&nbsp;</p>\n<p><strong class=\"example\">Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> fn = (x) =&gt; x * 5, args = [2], t = 20, cancelTime = 50\n<strong>Output:</strong> [{&quot;time&quot;: 20, &quot;returned&quot;: 10}]\n<strong>Explanation:</strong> \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</pre>\n\n<p><strong class=\"example\">Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> fn = (x) =&gt; x**2, args = [2], t = 100, cancelTime = 50\n<strong>Output:</strong> []\n<strong>Explanation:</strong> fn(2) was never called because cancelTime (50ms) is before the delay time (100ms).\n</pre>\n\n<p><strong class=\"example\">Example 3:</strong></p>\n\n<pre>\n<strong>Input:</strong> fn = (x1, x2) =&gt; x1 * x2, args = [2,4], t = 30, cancelTime = 100\n<strong>Output:</strong> [{&quot;time&quot;: 30, &quot;returned&quot;: 8}]\n<strong>Explanation:</strong> fn(2, 4) was called at t=30ms because cancelTime &gt; t.\n</pre>\n\n<p>&nbsp;</p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>fn is a function</code></li>\n\t<li><code>args is a valid JSON array</code></li>\n\t<li><code>1 &lt;= args.length &lt;= 10</code></li>\n\t<li><code><font face=\"monospace\">20 &lt;= t &lt;= 1000</font></code></li>\n\t<li><code><font face=\"monospace\">10 &lt;= cancelT &lt;= 1000</font></code></li>\n</ul>\n",
            "translatedTitle": "执行可取消的延迟函数",
            "translatedContent": "<p>现给定一个函数 <code>fn</code>&nbsp;，一个参数数组 <code>args</code> 和一个以毫秒为单位的超时时间 <code>t</code> ，返回一个取消函数 <code>cancelFn</code> 。</p>\n\n<p>在经过 <code>t</code> 毫秒的延迟后，<strong>除非</strong> 先调用 <code>cancelFn</code> ，否则&nbsp;<code>fn</code> 应该以 <code>args</code> 作为参数被调用。并且在这种情况下，<code>fn</code> 不应该被调用。</p>\n\n<p>&nbsp;</p>\n\n<p><strong class=\"example\">示例 1:</strong></p>\n\n<pre>\n<b>输入：</b>fn = (x) =&gt; x * 5, args = [2], t = 20, cancelTime = 50\n<b>输出：</b>[{\"time\": 20, \"returned\": 10}]\n<b>解释：</b>\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</pre>\n\n<p><strong class=\"example\">示例 2：</strong></p>\n\n<pre>\n<b>输入：</b>fn = (x) =&gt; x**2, args = [2], t = 100, cancelTime = 50\n<b>输出：</b>[]\n<b>解释：</b>fn(2) 从未被调用，因为 cancelTime（50ms）在延迟时间（100ms）之前。\n</pre>\n\n<p><strong class=\"example\">示例 3：</strong></p>\n\n<pre>\n<b>输入：</b>fn = (x1, x2) =&gt; x1 * x2, args = [2,4], t = 30, cancelTime = 100\n<b>输出：</b>[{\"time\": 30, \"returned\": 8}]\n<b>解释：</b>fn(2) 从未被调用，因为 cancelTime（50ms）在延迟时间（100ms）之前。\n</pre>\n\n<p>&nbsp;</p>\n\n<p><strong>提示：</strong></p>\n\n<ul>\n\t<li><code>fn 是一个函数</code></li>\n\t<li><code>args 是一个有效的 JSON 数组</code></li>\n\t<li><code>1 &lt;= args.length &lt;= 10</code></li>\n\t<li><code><font face=\"monospace\">20 &lt;= t &lt;= 1000</font></code></li>\n\t<li><code><font face=\"monospace\">10 &lt;= cancelT &lt;= 1000</font></code></li>\n</ul>\n",
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                    "code": "/**\n * @param {Function} fn\n * @param {Array} args\n * @param {number} t\n * @return {Function}\n */\nvar cancellable = function(fn, args, t) {\n    \n};\n\n/**\n *  const result = []\n *\n *  const fn = (x) => x * 5\n *  const args = [2], t = 20, cancelT = 50\n *\n *  const log = (...argsArr) => {\n *      result.push(fn(...argsArr))\n *  }\n *       \n *  const cancel = cancellable(fn, args, t);\n *           \n *  setTimeout(() => {\n *     cancel()\n *     console.log(result) // [{\"time\":20,\"returned\":10}]\n *  }, cancelT)\n */",
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