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

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            "questionId": "2862",
            "questionFrontendId": "2725",
            "categoryTitle": "JavaScript",
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            "title": "Interval Cancellation",
            "titleSlug": "interval-cancellation",
            "content": "Given a function <code>fn,</code> an array of arguments&nbsp;<code>args</code>, and&nbsp;an interval time <code>t</code>, return a cancel function <code>cancelFn</code>. The function <code>fn</code> should be called with <code>args</code> immediately and then called again every&nbsp;<code>t</code> milliseconds&nbsp;until <code>cancelFn</code> is called.\n<p>&nbsp;</p>\n<p><strong class=\"example\">Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> fn = (x) =&gt; x * 2, args = [4], t = 20, cancelT = 110\n<strong>Output:</strong> \n[\n   {&quot;time&quot;: 0, &quot;returned&quot;: 8},\n   {&quot;time&quot;: 20, &quot;returned&quot;: 8},\n   {&quot;time&quot;: 40, &quot;returned&quot;: 8},\n   {&quot;time&quot;: 60, &quot;returned&quot;: 8},\n   {&quot;time&quot;: 80, &quot;returned&quot;: 8},\n   {&quot;time&quot;: 100, &quot;returned&quot;: 8}\n]\n<strong>Explanation:</strong> Every 20ms, fn(4) is called. Until t=110ms, then it is cancelled.\n\nconst cancel = cancellable(x =&gt; x * 2, [4], 20);\nsetTimeout(cancel, 110);\n\n1st fn call is at 0ms. fn(4) returns 8.\n2nd fn call is at 20ms. fn(4) returns 8.\n3rd fn call is at 40ms. fn(4) returns 8.\n4th fn call is at&nbsp;60ms. fn(4) returns 8.\n5th fn call is at 80ms. fn(4) returns 8.\n6th fn call is at 100ms. fn(4) returns 8.\n</pre>\n\n<p><strong class=\"example\">Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> fn = (x1, x2) =&gt; (x1 * x2), args = [2, 5], t = 25, cancelT = 140\n<strong>Output:</strong> \n[\n   {&quot;time&quot;: 0, &quot;returned&quot;: 10},\n   {&quot;time&quot;: 25, &quot;returned&quot;: 10},\n   {&quot;time&quot;: 50, &quot;returned&quot;: 10},\n   {&quot;time&quot;: 75, &quot;returned&quot;: 10},\n   {&quot;time&quot;: 100, &quot;returned&quot;: 10},\n   {&quot;time&quot;: 125, &quot;returned&quot;: 10}\n]\n<strong>Explanation:</strong> Every 25ms, fn(2, 5) is called. Until t=140ms, then it is cancelled.\n1st fn call is at 0ms&nbsp;\n2nd fn call is at 25ms&nbsp;\n3rd fn call is at 50ms&nbsp;\n4th fn call is at&nbsp;75ms&nbsp;\n5th fn call is at 100ms&nbsp;\n6th fn call is at 125ms\nCancelled at 140ms\n</pre>\n\n<p><strong class=\"example\">Example 3:</strong></p>\n\n<pre>\n<strong>Input:</strong> fn = (x1, x2, x3) =&gt; (x1 + x2 + x3), args = [5, 1, 3], t = 50, cancelT = 180\n<strong>Output:</strong> \n[\n   {&quot;time&quot;: 0, &quot;returned&quot;: 9},\n   {&quot;time&quot;: 50, &quot;returned&quot;: 9},\n   {&quot;time&quot;: 100, &quot;returned&quot;: 9},\n   {&quot;time&quot;: 150, &quot;returned&quot;: 9}\n]\n<strong>Explanation:</strong> Every 50ms, fn(5, 1, 3) is called. Until t=180ms, then it is cancelled. \n1st fn call is at 0ms\n2nd fn call is at 50ms\n3rd fn call is at 100ms\n4th fn call is at&nbsp;150ms\nCancelled at 180ms\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": "间隔取消",
            "translatedContent": "现给定一个函数 <code>fn</code>，一个参数数组 <code>args</code> 和一个时间间隔 <code>t</code>，返回一个取消函数 <code>cancelFn</code>。函数 <code>fn</code> 应该立即使用 <code>args</code> 调用，并且在每个 <code>t</code> 毫秒内再次调用，直到调用 <code>cancelFn</code>。\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 * 2, args = [4], t = 20, cancelT = 110\n<b>输出：</b>\n[\n   {\"time\": 0, \"returned\": 8},\n   {\"time\": 20, \"returned\": 8},\n   {\"time\": 40, \"returned\": 8},\n   {\"time\": 60, \"returned\": 8},\n   {\"time\": 80, \"returned\": 8},\n   {\"time\": 100, \"returned\": 8}\n]\n<strong>解释：</strong> 每隔 20ms，调用 fn(4)。直到 t=110ms，然后取消。\nconst cancel = cancellable(x =&gt; x * 2, [4], 20);\nsetTimeout(cancel, 110);\n第一次调用 fn 是在 0ms。fn(4) 返回 8。\n第二次调用 fn 是在 20ms。fn(4) 返回 8。\n第三次调用 fn 是在 40ms。fn(4) 返回 8。\n第四次调用 fn 是在&nbsp;60ms。fn(4) 返回 8。\n第五次调用 fn 是在 80ms。fn(4) 返回 8。\n第六次调用 fn 是在 100ms。fn(4) 返回 8。</pre>\n\n<p><strong class=\"example\">示例 2：</strong></p>\n\n<pre>\n<b>输入：</b>fn = (x1, x2) =&gt; (x1 * x2), args = [2, 5], t = 25, cancelT = 140\n<strong>输出：</strong> \n[\n   {\"time\": 0, \"returned\": 10},\n   {\"time\": 25, \"returned\": 10},\n   {\"time\": 50, \"returned\": 10},\n   {\"time\": 75, \"returned\": 10},\n   {\"time\": 100, \"returned\": 10},\n   {\"time\": 125, \"returned\": 10}\n]\n<strong>解释：</strong>每隔 25ms，调用 fn(2, 5)。直到 t=140ms，然后取消。\n第一次调用 fn 是在 0ms\n第二次调用 fn 是在 25ms\n第三次调用 fn 是在 50ms\n第四次调用 fn 是在&nbsp;75ms\n第五次调用 fn 是在 100ms\n第六次调用 fn 是在 125ms\n在 140ms 取消\n</pre>\n\n<p><strong class=\"example\">示例 3：</strong></p>\n\n<pre>\n<b>输入：</b>fn = (x1, x2, x3) =&gt; (x1 + x2 + x3), args = [5, 1, 3], t = 50, cancelT = 180\n<b>输出：</b>\n[\n   {\"time\": 0, \"returned\": 9},\n   {\"time\": 50, \"returned\": 9},\n   {\"time\": 100, \"returned\": 9},\n   {\"time\": 150, \"returned\": 9}\n]\n<b>解释：</b>每隔 50ms，调用 fn(5, 1, 3)。直到 t=180ms，然后取消。\n第一次调用 fn 是在 0ms\n第二次调用 fn 是在 50ms\n第三次调用 fn 是在 100ms\n第四次调用 fn 是在&nbsp;150ms\n在 180ms 取消\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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