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JSON从数据中获取数组键(JSON get array key from data)

 我正在尝试从parseJSON函数获取数组键。 我可以得到错误消息 - 努力找到获取数组键的方法。  
 代码是：  
var result = jQuery.parseJSON(response);

console.log(result['error']);
console.log(result);
 
 我只发送一个密钥，输出看起来像这样：  
Object {error: "Please enter a name"}

I'm trying to get the array key from a parseJSON function. I can get the error message just fine - struggling to find a way to get the array key. 
code is: 
var result = jQuery.parseJSON(response);

console.log(result['error']);
console.log(result);
 
I am only sending one key through and the output looks like this: 
Object {error: "Please enter a name"}

原文：https://stackoverflow.com/questions/28997426

更新时间：2022-07-23 17:07

最满意答案

 动态生成HTML的优点  
 在您的简单示例中，您使用的两个选项中的哪一个实际上并不重要。 但是，如果要创建动态内容，则需要使用像ERB这样的模板系统，如下例所示：  
<%= image_tag(@user.logged_in? ? "logged_in.png" : "not_logged_in.png", :class => "login_status") %>
 
 您不能使用静态HTML执行此操作。  
 性能  
 在提供HTML之前动态生成这样的HTML显然比服务静态HTML需要更长的时间。 但是，Rails内置了缓存 ，因此您可以轻松控制其影响。 

Advantage of dynamically generated HTML 
In your simple example, it's actually not important which one of your two options you use. Having a templating system like ERB is however necessary if as you want to create dynamic content, like in this example: 
<%= image_tag(@user.logged_in? ? "logged_in.png" : "not_logged_in.png", :class => "login_status") %>
 
You cannot do this with static HTML. 
Performance 
Dynamically generating the HTML like this before serving it will obviously take a bit longer than serving static HTML. Rails has caching built in, however, so you can easily control the impact of this.

JSON从数据中获取数组键(JSON get array key from data)

最满意答案

动态生成HTML的优点

性能

Advantage of dynamically generated HTML

Performance

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