leetcode-problemset/leetcode-cn/originData/timeout-cancellation.json

{
    "data": {
        "question": {
            "questionId": "2821",
            "questionFrontendId": "2715",
            "categoryTitle": "JavaScript",
            "boundTopicId": 2293968,
            "title": "Timeout Cancellation",
            "titleSlug": "timeout-cancellation",
            "content": "<p>Given a function <code>fn</code>, an array of&nbsp;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 <code>cancelTimeMs</code>, the returned cancel function <code>cancelFn</code> will be invoked.</p>\n\n<pre>\nsetTimeout(cancelFn, cancelTimeMs)\n</pre>\n\n<p>Initially, the execution of the function <code>fn</code> should be delayed by <code>t</code> milliseconds.</p>\n\n<p>If, before the delay of <code>t</code> milliseconds, the function <code>cancelFn</code> is invoked, it should cancel the delayed execution of <code>fn</code>. Otherwise, if <code>cancelFn</code> is not invoked within the specified delay <code>t</code>, <code>fn</code> should be executed with the provided <code>args</code> as arguments.</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\n<strong>Output:</strong> [{&quot;time&quot;: 20, &quot;returned&quot;: 10}]\n<strong>Explanation:</strong> \nconst cancelTimeMs = 50;\nconst cancelFn = cancellable((x) =&gt; x * 5, [2], 20);\nsetTimeout(cancelFn, cancelTimeMs);\n\nThe cancellation was scheduled to occur after a delay of cancelTimeMs (50ms), which happened after the execution of fn(2) at 20ms.\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\n<strong>Output:</strong> []\n<strong>Explanation:</strong> \nconst cancelTimeMs = 50;\nconst cancelFn = cancellable((x) =&gt; x**2, [2], 100);\nsetTimeout(cancelFn, cancelTimeMs);\n\nThe 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.\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\n<strong>Output:</strong> [{&quot;time&quot;: 30, &quot;returned&quot;: 8}]\n<strong>Explanation: \n</strong>const cancelTimeMs = 100;\nconst cancelFn = cancellable((x1, x2) =&gt; x1 * x2, [2,4], 30);\nsetTimeout(cancelFn, cancelTimeMs);\n\nThe cancellation was scheduled to occur after a delay of cancelTimeMs (100ms), which happened after the execution of fn(2,4) at 30ms.\n</pre>\n\n<p>&nbsp;</p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>fn</code> is a function</li>\n\t<li><code>args</code> is a valid JSON array</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;= cancelTimeMs &lt;= 1000</font></code></li>\n</ul>\n",
            "translatedTitle": "执行可取消的延迟函数",
            "translatedContent": "<p>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 <code>cancelTimeMs</code>&nbsp;的延迟后，返回的取消函数 <code>cancelFn</code> 将被调用。</p>\n\n<pre>\nsetTimeout(cancelFn, cancelTimeMs)\n</pre>\n\n<p>最初，函数 <code>fn</code> 的执行应该延迟 <code>t</code> 毫秒。</p>\n\n<p>如果在 <code>t</code> 毫秒的延迟之前调用了函数 <code>cancelFn</code>，它应该取消 <code>fn</code> 的延迟执行。否则，如果在指定的延迟 <code>t</code> 内没有调用 <code>cancelFn</code>，则应执行 <code>fn</code>，并使用提供的 <code>args</code> 作为参数。</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\n<b>输出：</b>[{\"time\": 20, \"returned\": 10}]\n<b>解释：</b>\nconst cancelTimeMs = 50;\nconst cancelFn = cancellable((x) =&gt; x * 5, [2], 20);\nsetTimeout(cancelFn, cancelTimeMs);\n\n取消操作被安排在延迟了 cancelTimeMs（50毫秒）后进行，这发生在 fn(2) 在20毫秒时执行之后。</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\n<b>输出：</b>[]\n<b>解释：</b>\nconst cancelTimeMs = 50;\nconst cancelFn = cancellable((x) =&gt; x**2, [2], 100);\nsetTimeout(cancelFn, cancelTimeMs);\n\n取消操作被安排在延迟了 cancelTimeMs（50毫秒）后进行，这发生在 fn(2) 在100毫秒时执行之前，导致 fn(2) 从未被调用。\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\n<b>输出：</b>[{\"time\": 30, \"returned\": 8}]\n<b>解释：</b>\nconst cancelTimeMs = 100;\nconst cancelFn = cancellable((x1, x2) =&gt; x1 * x2, [2,4], 30);\nsetTimeout(cancelFn, cancelTimeMs);\n\n取消操作被安排在延迟了 cancelTimeMs（100毫秒）后进行，这发生在 fn(2,4) 在30毫秒时执行之后。\n</pre>\n\n<p>&nbsp;</p>\n\n<p><strong>提示：</strong></p>\n\n<ul>\n\t<li><code>fn</code> 是一个函数</li>\n\t<li><code>args</code> 是一个有效的 JSON 数组</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;= cancelTimeMs&nbsp;&lt;= 1000</font></code></li>\n</ul>\n",
            "isPaidOnly": false,
            "difficulty": "Easy",
            "likes": 6,
            "dislikes": 0,
            "isLiked": null,
            "similarQuestions": "[]",
            "contributors": [],
            "langToValidPlayground": "{\"cpp\": true, \"java\": true, \"python\": true, \"python3\": true, \"mysql\": false, \"mssql\": false, \"oraclesql\": false, \"c\": false, \"csharp\": false, \"javascript\": false, \"typescript\": false, \"bash\": false, \"php\": false, \"swift\": false, \"kotlin\": false, \"dart\": false, \"golang\": false, \"ruby\": false, \"scala\": false, \"html\": false, \"pythonml\": false, \"rust\": false, \"racket\": false, \"erlang\": false, \"elixir\": false, \"pythondata\": false, \"react\": false, \"vanillajs\": false, \"postgresql\": false, \"cangjie\": false}",
            "topicTags": [],
            "companyTagStats": null,
            "codeSnippets": [
                {
                    "lang": "JavaScript",
                    "langSlug": "javascript",
                    "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, cancelTimeMs = 50;\n *\n *  const start = performance.now();\n *\n *  const log = (...argsArr) => {\n *      const diff = Math.floor(performance.now() - start);\n *      result.push({\"time\": diff, \"returned\": fn(...argsArr)});\n *  }\n *       \n *  const cancel = cancellable(log, args, t);\n *\n *  const maxT = Math.max(t, cancelTimeMs);\n *           \n *  setTimeout(cancel, cancelTimeMs);\n *\n *  setTimeout(() => {\n *      console.log(result); // [{\"time\":20,\"returned\":10}]\n *  }, maxT + 15)\n */",
                    "__typename": "CodeSnippetNode"
                },
                {
                    "lang": "TypeScript",
                    "langSlug": "typescript",
                    "code": "type JSONValue = null | boolean | number | string | JSONValue[] | { [key: string]: JSONValue };\ntype Fn = (...args: JSONValue[]) => void\n\nfunction cancellable(fn: Fn, args: JSONValue[], t: number): Function {\n    \n};\n\n/**\n *  const result = [];\n *\n *  const fn = (x) => x * 5;\n *  const args = [2], t = 20, cancelTimeMs = 50;\n *\n *  const start = performance.now();\n *\n *  const log = (...argsArr) => {\n *      const diff = Math.floor(performance.now() - start);\n *      result.push({\"time\": diff, \"returned\": fn(...argsArr)});\n *  }\n *       \n *  const cancel = cancellable(log, args, t);\n *\n *  const maxT = Math.max(t, cancelTimeMs);\n *           \n *  setTimeout(cancel, cancelTimeMs);\n *\n *  setTimeout(() => {\n *      console.log(result); // [{\"time\":20,\"returned\":10}]\n *  }, maxT + 15)\n */",
                    "__typename": "CodeSnippetNode"
                }
            ],
            "stats": "{\"totalAccepted\": \"5.1K\", \"totalSubmission\": \"6.1K\", \"totalAcceptedRaw\": 5069, \"totalSubmissionRaw\": 6110, \"acRate\": \"83.0%\"}",
            "hints": [],
            "solution": null,
            "status": null,
            "sampleTestCase": "(x) => x * 5\n[2]\n20\n50",
            "metaData": "{\n  \"name\": \"cancellable\",\n  \"params\": [\n    {\n      \"name\": \"fn\",\n      \"type\": \"string\"\n    },\n    {\n      \"type\": \"string\",\n      \"name\": \"args\"\n    },\n    {\n      \"type\": \"integer\",\n      \"name\": \"t\"\n    },\n    {\n      \"type\": \"integer\",\n      \"name\": \"cancelTimeMs\"\n    }\n  ],\n  \"return\": {\n    \"type\": \"integer\"\n  },\n  \"languages\": [\n    \"javascript\",\n    \"typescript\"\n  ],\n  \"manual\": true\n}",
            "judgerAvailable": true,
            "judgeType": "large",
            "mysqlSchemas": [],
            "enableRunCode": true,
            "envInfo": "{\"javascript\":[\"JavaScript\",\"<p>\\u7248\\u672c\\uff1a<code>Node.js 20.10.0<\\/code><\\/p>\\r\\n\\r\\n<p>\\u60a8\\u7684\\u4ee3\\u7801\\u5728\\u6267\\u884c\\u65f6\\u5c06\\u5e26\\u4e0a <code>--harmony<\\/code> \\u6807\\u8bb0\\u6765\\u5f00\\u542f <a href=\\\"http:\\/\\/node.green\\/\\\" target=\\\"_blank\\\">\\u65b0\\u7248ES6\\u7279\\u6027<\\/a>\\u3002<\\/p>\\r\\n\\r\\n<p><a href=\\\"https:\\/\\/lodash.com\\\" target=\\\"_blank\\\">lodash.js<\\/a> \\u5e93\\u5df2\\u7ecf\\u9ed8\\u8ba4\\u88ab\\u5305\\u542b\\u3002<\\/p>\\r\\n\\r\\n<p> \\u5982\\u9700\\u4f7f\\u7528\\u961f\\u5217\\/\\u4f18\\u5148\\u961f\\u5217\\uff0c\\u60a8\\u53ef\\u4f7f\\u7528 <a href=\\\"https:\\/\\/github.com\\/datastructures-js\\/priority-queue\\/blob\\/v5\\/README.md\\\" target=\\\"_blank\\\"> datastructures-js\\/priority-queue@5.4.0<\\/a>\\uff0c<a href=\\\"https:\\/\\/github.com\\/datastructures-js\\/queue\\/tree\\/v4.2.3\\\" target=\\\"_blank\\\"> datastructures-js\\/queue@4.2.3<\\/a> \\u4ee5\\u53ca <a href=\\\"https:\\/\\/github.com\\/datastructures-js\\/deque\\/tree\\/v1.0.4\\\" target=\\\"_blank\\\"> datastructures-js\\/deque@1.0.4<\\/a>\\u3002<\\/p>\"],\"typescript\":[\"TypeScript\",\"<p>TypeScript 5.1.6<\\/p>\\r\\n\\r\\n<p>Compile Options: --alwaysStrict --strictBindCallApply --strictFunctionTypes --target ES2022<\\/p>\\r\\n\\r\\n<p><a href=\\\"https:\\/\\/lodash.com\\\" target=\\\"_blank\\\">lodash.js<\\/a> \\u5e93\\u5df2\\u7ecf\\u9ed8\\u8ba4\\u88ab\\u5305\\u542b\\u3002<\\/p>\\r\\n\\r\\n<p> \\u5982\\u9700\\u4f7f\\u7528\\u961f\\u5217\\/\\u4f18\\u5148\\u961f\\u5217\\uff0c\\u60a8\\u53ef\\u4f7f\\u7528 <a href=\\\"https:\\/\\/github.com\\/datastructures-js\\/priority-queue\\/blob\\/v5\\/README.md\\\" target=\\\"_blank\\\"> datastructures-js\\/priority-queue@5.4.0<\\/a>\\uff0c<a href=\\\"https:\\/\\/github.com\\/datastructures-js\\/queue\\/tree\\/v4.2.3\\\" target=\\\"_blank\\\"> datastructures-js\\/queue@4.2.3<\\/a> \\u4ee5\\u53ca <a href=\\\"https:\\/\\/github.com\\/datastructures-js\\/deque\\/tree\\/v1.0.4\\\" target=\\\"_blank\\\"> datastructures-js\\/deque@1.0.4<\\/a>\\u3002<\\/p>\"]}",
            "book": null,
            "isSubscribed": false,
            "isDailyQuestion": false,
            "dailyRecordStatus": null,
            "editorType": "CKEDITOR",
            "ugcQuestionId": null,
            "style": "LEETCODE",
            "exampleTestcases": "(x) => x * 5\n[2]\n20\n50\n(x) => x**2\n[2]\n100\n50\n(x1, x2) => x1 * x2\n[2,4]\n30\n100",
            "__typename": "QuestionNode"
        }
    }
}