这段代码意味着什么？ （JavaScript）的 [英] What does this piece of code means? (Javascript)

问题描述

var chatRoom = {
    'all': []
};

我是编程新手，我必须经历一些代码。我有一些Java知识，但不是JavaScript。请原谅我提出愚蠢的问题。谢谢！



我的尝试：



没什么尝试。我只需要一些解释。

I'm absolutely new to programming and I have to go through some code. I've some knowledge of Java, but not JavaScript. Pardon me for asking silly questions. Thank you!

What I have tried:

Nothing much to try. I just need some explanation.

推荐答案

它是JSON，它创建了一个名为chatRoom的对象，其中包含一个名为all的属性，该属性的值为[]，这意味着一个空数组。所以一旦定义你可以操作数组作为普通的js数组

It's JSON and it creates an object called chatRoom with a property called "all" and the value of that property is [] which means an empty array. So once defined you can manipulate the array as a normal js array

var chatRoom = {
    'all': []
};

chatRoom.all.push('Hello');
chatRoom.all.push('World');

for (var i = 0; i < chatRoom.all.length; i++)
{
    alert(chatRoom.all[i]);
}

请参阅 JavaScript教程 [ ^ ]。

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