什么是除外。长度属性的JavaScript数组和对象之间的区别？ [英] What's the difference between JavaScript Array and Object except .length property?

问题描述

当我想到，JS数组只是一个哈希地图，只接受整数值作为重点。而物业。长度只返回最大索引+ 1。

As I think, JS array is just a hash-map which accepts only integral value as a key. And the .length property just return largest index + 1.

这是正确的？是否有任何其他区别？

Is this right? Is there any other differences?

推荐答案

的区别是：

Object.prototype.toString.call([]); // [object Array]
Object.prototype.toString.call({}); // [object Object]

编辑：

另外，看看从ECMAScript中规格本节，因为它precisely解释数组是什么： http://bclary.com/2004/11/07/#a-15.4

Also, have a look at this section from ECMAScript specifications as it precisely explains what an Array is: http://bclary.com/2004/11/07/#a-15.4

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