js !Array.isArray
时间: 2023-11-03 11:19:24 浏览: 156
cityArray.js
在JavaScript中,`!Array.isArray`是一个逻辑运算符,用于对`Array.isArray`的返回值取反。`Array.isArray`方法用于判断一个值是否为数组,返回一个布尔值。所以`!Array.isArray`就是判断一个值是否不是数组。如果值是数组,则返回`false`;如果值不是数组,则返回`true`。例如,对于数组`arr = [1, 2, 3]`,`!Array.isArray(arr)`的结果为`false`,因为`arr`是一个数组;而对于对象`obj = { name: 'Yee' }`,`!Array.isArray(obj)`的结果为`true`,因为`obj`不是一个数组。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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