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测试下摘要
2022-07-07 10:49:00 【社会瑞弟】
上篇介绍了数组的基本概念和一些简单的数组元素操作函数,实际上,数组提供的函数还有很多。
push、pop、shift和unshift是操作数组首尾两端的函数,上文已经讲过,本文不再赘述。
元素删除(对象方式)
上篇已经简单介绍过,数组就是一个特殊的对象,因此我们可以尝试使用对象的属性删除方法:delete。
举个例子:111111
let arr = [1,2,3,4,5];
delete arr[2];
console.log(arr);
1
2
3
代码执行结果如下:
注意观察图中标黄的位置,虽然元素被删除了,但是数组的长度仍然是5,而且删除掉的位置多了一个空。如果我们访问下标为2的元素,会得到如下的结果:
————————————————
版权声明:本文为CSDN博主「@魏大大」的原创文章,遵循CC 4.0 BY-SA版权协议,转载请附上原文出处链接及本声明。
原文链接:https://blog.csdn.net/weixin_43302112/article/details/1251053312222
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