Array笔记.md

1. Array-like Object

   定义:

   • objects with a length property and indexed elements.
   • which are Object representations of Arrays with a length property.(另一种定义)
   • 听了那么多次Array-like Object,今天才知道它的确切定义，好丢人啊。

   示例：

    ```
    var realArray = ['a', 'b', 'c'];
    var arrayLike = {
      0: 'a',
      1: 'b',
      2: 'c',
      length: 3
    };
    ```
   

   包含：

   arguments HTMLCollection NodeList