node.js 从 Node .js 中的 JSON 数组读取值
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Read a value from JSON array in Node .js
提问by Fox
I need to access the "State" value from the following array --
我需要从以下数组访问“状态”值——
data =
{
Images:
[
{
ProductCodes: [],
BlockDeviceMappings: [Object],
Tags: [],
ImageId: 'ami-75301c',
ImageLocation: '54696560/Test Image 3',
State: 'available',
VirtualizationType: 'pavirtul',
Hypervisor: 'xen'
}
],
requestId: '2eb809d3-7f82-4142-b5d1-6af3'
}
When I try data.Images["State"]or data.Images.StateI get undefined.
当我尝试data.Images["State"]或data.Images.State未定义时。
Thanks
谢谢
回答by abu
Images maps to an array which stores objects, so you have to specify the index of the item you want. Try data.images[0]["State"].
图像映射到存储对象的数组，因此您必须指定所需项目的索引。试试 data.images[0]["State"]。
回答by Mahmudul Mannan
You can access like this:
您可以这样访问：
data.Images[0].State
Or even:
甚至：
data.Images[0]['State']
回答by naveen kumar
Access the state with data.image[0].state. Your method was wrong because inside the image, you need an index within the two square bracket, the image property is an array.
使用 访问状态data.image[0].state。你的方法是错误的，因为在 里面image，你需要在两个方括号内有一个索引，图像属性是一个数组。
