javascript 从嵌套的 json 中获取键的值
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Get value of key from a nested json
提问by Okky
I have a (nested) data structure containing objects and arrays. How can I extract the information, i.e. access a specific or multiple values with help of a known key?
我有一个包含对象和数组的（嵌套）数据结构。如何提取信息，即在已知密钥的帮助下访问特定或多个值？
For example:
例如：
var data = {
code: 42,
items: [{
id: 1,
category: [{
cId: 1,
prodname: 'foo',
quality: [{
qId: 012,
testName: 'micro'
}, {
qId: 013,
testName: 'nano'
}]
}, {
id: 2,
prodname: 'bar'
}]
}]
};
How could I access the value of key quality?
我怎样才能访问 key 的值quality？
Note: This is a sample JSON object the object is dynamically generated; it is of unknown depth.
注意：这是一个示例 JSON 对象，该对象是动态生成的；它的深度未知。
采纳答案by oleq
That way is correct:
这种方式是正确的：
data.items[ 0 ].category[ 0 ].quality;
> [ Object, Object ]
