存量题库数据更新

leetcode/problem/timeout-cancellation.html

@@ -1,51 +1,74 @@
 <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>
 
-<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 invoked before the delay of <code>t</code> milliseconds elapses, specifically at <code>cancelT</code>&nbsp;ms.&nbsp;In that case,&nbsp;<code>fn</code> should never be called.</p>
+<p>After a delay of <code>cancelTimeMs</code>, the returned cancel function <code>cancelFn</code> will be invoked.</p>
+
+<pre>
+setTimeout(cancelFn, cancelTimeMs)
+</pre>
+
+<p>Initially, the execution of the function <code>fn</code> should be delayed by <code>t</code> milliseconds.</p>
+
+<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>
 
 <p>&nbsp;</p>
 <p><strong class="example">Example 1:</strong></p>
 
 <pre>
-<strong>Input:</strong> fn = (x) =&gt; x * 5, args = [2], t = 20, cancelT = 50
+<strong>Input:</strong> fn = (x) =&gt; x * 5, args = [2], t = 20
 <strong>Output:</strong> [{&quot;time&quot;: 20, &quot;returned&quot;: 10}]
 <strong>Explanation:</strong> 
-const cancel = cancellable((x) =&gt; x * 5, [2], 20); // fn(2) called at t=20ms
-setTimeout(cancel, 50);
+const cancelTimeMs = 50;
+const result = [];
 
-The cancellation was scheduled to occur after a delay of cancelT (50ms), which happened after the execution of fn(2) at 20ms.
+const fn = (x) =&gt; x * 5;
+
+const start = performance.now();
+
+const log = (...argsArr) =&gt; {
+    const diff = Math.floor(performance.now() - start);
+    result.push({&quot;time&quot;: diff, &quot;returned&quot;: fn(...argsArr)});
+}
+ &nbsp; &nbsp;&nbsp;
+const cancel = cancellable(log, [2], 20);
+
+const maxT = Math.max(t, 50);
+&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;
+setTimeout(cancel, cancelTimeMs);
+
+setTimeout(() =&gt; {
+ &nbsp; &nbsp; console.log(result); // [{&quot;time&quot;:20,&quot;returned&quot;:10}]
+}, maxT + 15);
+
+The cancellation was scheduled to occur after a delay of cancelTimeMs (50ms), which happened after the execution of fn(2) at 20ms.
 </pre>
 
 <p><strong class="example">Example 2:</strong></p>
 
 <pre>
-<strong>Input:</strong> fn = (x) =&gt; x**2, args = [2], t = 100, cancelT = 50 
+<strong>Input:</strong> fn = (x) =&gt; x**2, args = [2], t = 100
 <strong>Output:</strong> []
 <strong>Explanation:</strong> 
-const cancel = cancellable((x) =&gt; x**2, [2], 100); // fn(2) not called
-setTimeout(cancel, 50);
-
-The cancellation was scheduled to occur after a delay of cancelT (50ms), which happened before the execution of fn(2) at 100ms, resulting in fn(2) never being called.
+const cancelTimeMs = 50;
+The 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.
 </pre>
 
 <p><strong class="example">Example 3:</strong></p>
 
 <pre>
-<strong>Input:</strong> fn = (x1, x2) =&gt; x1 * x2, args = [2,4], t = 30, cancelT = 100
+<strong>Input:</strong> fn = (x1, x2) =&gt; x1 * x2, args = [2,4], t = 30
 <strong>Output:</strong> [{&quot;time&quot;: 30, &quot;returned&quot;: 8}]
-<strong>Explanation:</strong>
-const cancel = cancellable((x1, x2) =&gt; x1 * x2, [2,4], 30); // fn(2,4) called at t=30ms
-setTimeout(cancel, 100);
-
-The cancellation was scheduled to occur after a delay of cancelT (100ms), which happened after the execution of fn(2,4) at 30ms.
+<strong>Explanation: 
+</strong>const cancelTimeMs = 100;
+The cancellation was scheduled to occur after a delay of cancelTimeMs (100ms), which happened after the execution of fn(2,4) at 30ms.
 </pre>
 
 <p>&nbsp;</p>
 <p><strong>Constraints:</strong></p>
 
 <ul>
-	<li><code>fn is a function</code></li>
-	<li><code>args is a valid JSON array</code></li>
+	<li><code>fn</code> is a function</li>
+	<li><code>args</code> is a valid JSON array</li>
 	<li><code>1 &lt;= args.length &lt;= 10</code></li>
 	<li><code><font face="monospace">20 &lt;= t &lt;= 1000</font></code></li>
-	<li><code><font face="monospace">10 &lt;= cancelT &lt;= 1000</font></code></li>
+	<li><code><font face="monospace">10 &lt;= cancelTimeMs &lt;= 1000</font></code></li>
 </ul>