jQuery 和 JSON：按名称获取元素
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jQuery and JSON: getting an element by name
提问by Chetan
I have the following JSON:
我有以下 JSON：
var json = { "system" : { "world" : { "actions" : { "hello" : { "src" : "hello world/hello world.js", "command" : "helloWorld" } } } } }
var json = { "system" : { "world" : { "actions" : { "hello" : { "src": "hello world/hello world.js", "command": "helloWorld" } } } } }
I have the following javascript:
我有以下 javascript：
var x = "system";
// get the contents of system by doing something like json.getElementByName(x)
var x = "系统";
// 通过执行类似 json.getElementByName(x) 的操作来获取系统的内容
How do I get the contents of system using jsonand xin jQuery?
如何在 jQuery 中使用json和获取系统内容x？
回答by Doug Neiner
Just use:
只需使用：
var x = "system";
json[x];
It is a key/valuesystem of retrieval, and doesn't need a function call to use it.
它是一个key/value检索系统，不需要函数调用来使用它。
回答by Pointy
Well to my knowledge jQuery doesn't navigate arbitrary objects like that - just the DOM. You could write a little function to do it:
就我所知，jQuery 不会像那样导航任意对象 - 只是 DOM。你可以写一个小函数来做到这一点：
function findSomething(object, name) {
if (name in object) return object[name];
for (key in object) {
if ((typeof (object[key])) == 'object') {
var t = findSomething(object[key], name);
if (t) return t;
}
}
return null;
}
It should be obvious that I haven't put that function through an elaborate QA process.
很明显，我还没有通过精心设计的 QA 流程来完成该功能。
