JSON数组的foreach，语法 [英] foreach for JSON array , syntax

问题描述

我的脚本正在从php服务器端脚本获取一些数组.

my script is getting some array from php server side script.

result = jQuery.parseJSON(result);

现在我要检查数组的每个变量.

now I want to check each variable of the array.

if (result.a!='') { something.... }
if (result.b!='') { something.... }
....

还有什么更好的方法可以使其快速实现，例如php'foreach'，'while'或smth吗?

Is there any better way to make it quick like in php 'foreach' , 'while' or smth ?

更新

这段代码(感谢hvgotcodes)为我提供了数组内变量的值，但是我又如何获得变量名呢?

This code ( thanks to hvgotcodes ) gives me values of variables inside the array but how can I get the names of variables also ?

for(var k in result) {
   alert(result[k]);
}

更新2

这是php side的工作方式

This is how php side works

$json = json_encode(array("a" => "test", "b" => "test",  "c" => "test", "d" => "test"));

推荐答案

您可以做类似的事情

for(var k in result) {
   console.log(k, result[k]);
}

循环遍历返回的json中的所有键并输出值.但是，如果您有嵌套结构，则需要使用

which loops over all the keys in the returned json and prints the values. However, if you have a nested structure, you will need to use

typeof result[k] === "object"

确定是否必须遍历嵌套对象.我使用过的大多数API，开发人员都知道要返回的内容的结构，因此这是不必要的.但是，我认为这种期望可能不适用于所有情况.

to determine if you have to loop over the nested objects. Most APIs I have used, the developers know the structure of what is being returned, so this is unnecessary. However, I suppose it's possible that this expectation is not good for all cases.

这篇关于JSON数组的foreach，语法的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！