在 Javascript 中构建 JSON
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Constructing JSON in Javascript
提问by NitZRobotKoder
I am trying to construct JSON object in js. There are couple of posts already about this topic in stack overflow itself. Referred to How do i build JSON dynamically in javascript?. Have to construct JSON exactly something like mentioned in the post.
我正在尝试在 js 中构造 JSON 对象。在堆栈溢出本身中已经有几篇关于这个主题的帖子。参考如何在 javascript 中动态构建 JSON？. 必须完全像帖子中提到的那样构造 JSON。
{
"privilege": {
"accesstype": "VIEW",
"attribute": [
{
"code": "contenttype",
"displayname": "Content type",
"value": {
"valcode": "book_article",
"valdisplayName": "Book Article"
}
},
{
"code": "mime",
"displayname": "Mime type",
"value": {
"valcode": "xml",
"valdisplayName": "Xml"
}
}
]
}
}
Follwed the answers in the post and tried this,
按照帖子中的答案进行尝试，
var privilege = {};
privilege.attribute[0].code = "contenttype";
privilege.attribute[0].displayname = "Content type";
privilege.attribute[0].value.valcode = "book_article";
privilege.attribute[0].value.valdisplayName = "Book Article";
But getting error as privilege.attribute undefined.
但是由于未定义特权.属性而出错。
I am not able to figure out where I am going wrong. Assuming there must be some declaration problems. Any light on it would be of great help.
我无法弄清楚我哪里出错了。假设肯定存在一些声明问题。任何关于它的灯都会有很大帮助。
回答by devOp
Try this:
试试这个：
var privilege = {};
privilege.attribute = [];
privilege.attribute[0] = {};
privilege.attribute[0].code="contenttype";
privilege.attribute[0].displayname="Content type";
privilege.attribute[0].value = {};
privilege.attribute[0].value.valcode="book_article";
privilege.attribute[0].value.valdisplayName="Book Article";
Have a look at Javascript Object. There is a lot of stuff out there. E.g http://mckoss.com/jscript/object.htm
看看 Javascript 对象。那里有很多东西。例如http://mckoss.com/jscript/object.htm
Edit: Initialized privilege.attribute[0] = {};after hint in comment.
编辑：privilege.attribute[0] = {};在评论提示后初始化。
回答by Jim Blackler
Why not just do
为什么不做
var privilege = {
"accesstype": "VIEW",
"attribute": [{
"code": "contenttype",
"displayname": "Content type",
"value": {
"valcode": "book_article",
"valdisplayName": "Book Article"
}
}, {
"code": "mime",
"displayname": "Mime type",
"value": {
"valcode": "xml",
"valdisplayName": "Xml"
}
}]
}
... in fact, you don't need the keys to be strings, you could write...
...事实上，你不需要键是字符串，你可以写...
var privilege = {
accesstype: "VIEW",
attribute: [{
code: "contenttype",
displayname: "Content type",
value: {
valcode: "book_article",
valdisplayName: "Book Article"
}
}, {
code: "mime",
displayname: "Mime type",
value: {
valcode: "xml",
valdisplayName: "Xml"
}
}]
}
回答by Salman
Try this
试试这个
privilege.attribute = [];
privilege.attribute.push({});
privilege.attribute[0].code="contenttype";
privilege.attribute[0].displayname="Content type";
privilege.attribute[0].value.valcode="book_article";
privilege.attribute[0].value.valdisplayName="Book Article";
