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什么是高阶函数?
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#IAG9YG
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2024-07-29 16:12
<p>高阶函数(Higher-Order Function)是一种可以接受函数作为参数或返回函数的函数。这种函数能够对其他函数进行操作,包括执行它们、修改它们的结构以及将它们组合在一起。 下面是一个高阶函数的示例:</p> <pre><code class="language-javascript">function higherOrderFunction(callback) { // 执行回调函数 callback(); } function myFunction() { console.log("Hello, world!"); } higherOrderFunction(myFunction); // Output: Hello, world!</code></pre> <p>在这个例子中,<code>higherOrderFunction</code>就是一个高阶函数,它接受一个函数作为参数并执行它。</p><br><p>高阶函数的常见用法包括:</p> <ol> <li>函数作为参数传递,如<code>Array.prototype.map()</code>, <code>Array.prototype.filter()</code>等。</li> <li>函数作为返回值,如实现柯里化和装饰器模式。</li> <li>函数嵌套,如闭包。</li> </ol> <p>高阶函数可以使代码更加灵活、可复用,同时也提高了代码的抽象性和可读性。</p>
<p>高阶函数(Higher-Order Function)是一种可以接受函数作为参数或返回函数的函数。这种函数能够对其他函数进行操作,包括执行它们、修改它们的结构以及将它们组合在一起。 下面是一个高阶函数的示例:</p> <pre><code class="language-javascript">function higherOrderFunction(callback) { // 执行回调函数 callback(); } function myFunction() { console.log("Hello, world!"); } higherOrderFunction(myFunction); // Output: Hello, world!</code></pre> <p>在这个例子中,<code>higherOrderFunction</code>就是一个高阶函数,它接受一个函数作为参数并执行它。</p><br><p>高阶函数的常见用法包括:</p> <ol> <li>函数作为参数传递,如<code>Array.prototype.map()</code>, <code>Array.prototype.filter()</code>等。</li> <li>函数作为返回值,如实现柯里化和装饰器模式。</li> <li>函数嵌套,如闭包。</li> </ol> <p>高阶函数可以使代码更加灵活、可复用,同时也提高了代码的抽象性和可读性。</p>
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