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小墨
2023-12-09 18:42:21 +08:00
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leetcode/problem/promise-time-limit.html
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@@ -1,6 +1,11 @@
<p>Given an&nbsp;asyncronous function&nbsp;<code>fn</code>&nbsp;and a time <code>t</code>&nbsp;in milliseconds, return&nbsp;a new&nbsp;<strong>time limited</strong>&nbsp;version of the input function.</p>
<p>Given an&nbsp;asynchronous function&nbsp;<code>fn</code>&nbsp;and a time <code>t</code>&nbsp;in milliseconds, return&nbsp;a new&nbsp;<strong>time limited</strong>&nbsp;version of the input function. <code>fn</code> takes arguments provided to the&nbsp;<strong>time limited&nbsp;</strong>function.</p>
<p>A&nbsp;<strong>time limited</strong>&nbsp;function is a function that is identical to the original unless it takes longer than&nbsp;<code>t</code>&nbsp;milliseconds to fullfill. In that case, it will reject with&nbsp;<code>&quot;Time Limit Exceeded&quot;</code>.&nbsp; Note that it should reject with a string, not an&nbsp;<code>Error</code>.</p>
<p>The <strong>time limited</strong> function should follow these rules:</p>
<ul>
<li>If the <code>fn</code> completes within the time limit of <code>t</code> milliseconds, the <strong>time limited</strong> function should&nbsp;resolve with the result.</li>
<li>If the execution of the <code>fn</code> exceeds the time limit, the <strong>time limited</strong> function should reject with the string <code>&quot;Time Limit Exceeded&quot;</code>.</li>
</ul>
<p>&nbsp;</p>
<p><strong class="example">Example 1:</strong></p>
@@ -15,6 +20,17 @@ inputs = [5]
t = 50
<strong>Output:</strong> {&quot;rejected&quot;:&quot;Time Limit Exceeded&quot;,&quot;time&quot;:50}
<strong>Explanation:</strong>
const limited = timeLimit(fn, t)
const start = performance.now()
let result;
try {
&nbsp; &nbsp;const res = await limited(...inputs)
&nbsp; &nbsp;result = {&quot;resolved&quot;: res, &quot;time&quot;: Math.floor(performance.now() - start)};
} catch (err) {
&nbsp; result = {&quot;rejected&quot;: err, &quot;time&quot;: Math.floor(performance.now() - start)};
}
console.log(result) // Output
The provided function is set to resolve after 100ms. However, the time limit is set to 50ms. It rejects at t=50ms because the time limit was reached.
</pre>
@@ -45,7 +61,7 @@ inputs = [5,10]
t = 150
<strong>Output:</strong> {&quot;resolved&quot;:15,&quot;time&quot;:120}
<strong>Explanation:</strong>
The function resolved 5 + 10 = 15 at t=120ms. The time limit is never reached.
​​​​The function resolved 5 + 10 = 15 at t=120ms. The time limit is never reached.
</pre>
<p><strong class="example">Example 4:</strong></p>
@@ -67,5 +83,5 @@ The function immediately throws an error.</pre>
<ul>
<li><code>0 &lt;= inputs.length &lt;= 10</code></li>
<li><code>0 &lt;= t &lt;= 1000</code></li>
<li><code>fn returns a promise</code></li>
<li><code>fn</code> returns a promise</li>
</ul>