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https://gitee.com/coder-xiaomo/leetcode-problemset
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59 lines
13 KiB
JSON
59 lines
13 KiB
JSON
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"boundTopicId": 2300584,
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"title": "Interval Cancellation",
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"titleSlug": "interval-cancellation",
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"content": "Given a function <code>fn,</code> an array of arguments <code>args</code>, and 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 <code>t</code> milliseconds until <code>cancelFn</code> is called.\n<p> </p>\n<p><strong class=\"example\">Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> fn = (x) => x * 2, args = [4], t = 20, cancelT = 110\n<strong>Output:</strong> \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>Explanation:</strong> Every 20ms, fn(4) is called. Until t=110ms, then it is cancelled.\n\nconst cancel = cancellable(x => 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 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) => (x1 * x2), args = [2, 5], t = 25, cancelT = 140\n<strong>Output:</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>Explanation:</strong> Every 25ms, fn(2, 5) is called. Until t=140ms, then it is cancelled.\n1st fn call is at 0ms \n2nd fn call is at 25ms \n3rd fn call is at 50ms \n4th fn call is at 75ms \n5th fn call is at 100ms \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) => (x1 + x2 + x3), args = [5, 1, 3], t = 50, cancelT = 180\n<strong>Output:</strong> \n[\n {"time": 0, "returned": 9},\n {"time": 50, "returned": 9},\n {"time": 100, "returned": 9},\n {"time": 150, "returned": 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 150ms\nCancelled at 180ms\n</pre>\n\n<p> </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 <= args.length <= 10</code></li>\n\t<li><code><font face=\"monospace\">20 <= t <= 1000</font></code></li>\n\t<li><code><font face=\"monospace\">10 <= cancelT <= 1000</font></code></li>\n</ul>\n",
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"translatedTitle": "间隔取消",
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"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> </p>\n\n<p><strong class=\"example\">示例 1：</strong></p>\n\n<pre>\n<b>输入：</b>fn = (x) => 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 => 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 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) => (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 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) => (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 150ms\n在 180ms 取消\n</pre>\n\n<p> </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 <= args.length <= 10</code></li>\n\t<li><code><font face=\"monospace\">20 <= t <= 1000</font></code></li>\n\t<li><code><font face=\"monospace\">10 <= cancelT <= 1000</font></code></li>\n</ul>\n",
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