Update JSON object using string search

Question

I have a JSON object and need to update this object by searching the required node using a string 'locator' and then modify its value

e.g.

var jsonObj = {
  "School":{
    "Name":"ABC School",
    "City":"Chicago",
    "Zip":"53896"
  },
  "Students":[
    {"Name":"Student1",
     "Age": "12",
     "Gender":"Male"
    },
    {"Name":"Student2",
     "Age": "10",
     "Gender":"Female"
    },
    {"Name":"Student3",
     "Age": "15",
     "Gender":"Female"
    }
    ]
}

Action to be performed - Create a function to Search the object using locator string 'School.Name' and update value to 'ZYZ School' or Search the object using locator string 'School.Students.1.Age' and update value to '18'

function updateJSON(jsonObj, 'School.Name', 'ZYZ School' ){}

you may have a look here: stackoverflow.com/questions/40131843/… — Nina Scholz
– Nina Scholz, Commented Aug 2, 2017 at 17:09

Boopesh · Accepted Answer · 2017-08-02 17:19:11Z

1

This should work

function updateJSON(jsonObj, locator, value) {
   var path = locator.split('.');
   if (!path.length) return;
   for (var i = 0; i < path.length - 1; ++i) {
        jsonObj = jsonObj[path[i]];
   }
   jsonObj[path[path.length - 1]] = value;  
}

answered Aug 2, 2017 at 17:19

Boopesh

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