访问嵌套json对象时的值替换

Question

This is my json object

{
  "a1": {
    "b1": {
      "name": "Tim",
      "status": "Completed"
     }
     "c1" {
       "field1": "name",
       "field2": "status"
     }
  }

I need to access the value Tim by getting the field key within c1. For example, I need to get the value of a1.c1.field1 which gives me the value name1 , then I need to access the value tim by a1.b1.(value of a1.c1.field1) I do not know how to do this. Can someone give the possible ways to accomplish this?

Answer 1

Your JSON is a little off, so it's corrected below. This is an example of how to retrieve the value of field1 in the c1 object (in the a1 object)

$(document).ready(function () {
    var json = {
        "a1":
        {
            "b1":
            {
                "name": "Tim",
                "status": "Completed"
            },
            "c1":
            {
                "field1": "name",
                "field2": "status"
            }
        }
    };


console.log(json.a1.b1.name); // returns Tim
// or
console.log(json["a1"]["b1"]["name"]); // returns Tim

});

Is this what you're looking for?

Answer 2

You can access using square brackets. With the data you provided,

var data = {
        "a1": {
            "b1": {
                "name": "Tim",
                "status": "Completed"
            },
            "c1":{
                "field1": "name",
                "field2": "status"
            }
    }
};

You can achieve your requirement by accessing.

data.a1.b1[data.a1.c1.field1]

Answer 3

The obvious way is to use a1.c1.field1 as a property accessor using the bracket notation.

var obj = {
    "a1": {
        "b1": {
            "name": "Tim",
            "status": "Completed"
        },

        "c1": {
            "field1": "name",
            "field2": "status"
        }
    }
};

console.log(obj.a1.c1.field1); // 'name'
console.log(obj.a1.b1[obj.a1.c1.field1]); // 'Tim'

or, more legibly,

var key = obj.a1.c1.field1;
var value = obj.a1.b1[key];
console.log(value); // 'Tim'

Answer 4

var a1 = 
{
    "b1":
    {
        "name": "Tim",
        "status": "Completed"
    },
    "c1":
    {
        "field1": "name",
        "field2": "status"
    }
};
console.log(a1.b1[a1.c1.field1]);

Do fix the error in your json too ;)