This is my code

var data={};

data={stdId:"101"};
data={empId:"102"};
data={deptId:"201"};

I have a data object getting data from services with one key only. but key names are different like stdId or empId ,etc.
I want to assign empty value to stdId or empId ,etc. like data={stdId:""} .
The key names are changed dynamically based on services.

This is my code

var data={};

data={stdId:"101"};
data={empId:"102"};
data={deptId:"201"};

I have a data object getting data from services with one key only. but key names are different like stdId or empId ,etc.
I want to assign empty value to stdId or empId ,etc. like data={stdId:""} .
The key names are changed dynamically based on services.

• javascript
• angularjs

• How are you planning to use this kind data in your application even if you achieve just to make key value as null? – Dhiren Commented Mar 8, 2016 at 14:00

4 Answers 4

Not entirely sure what you are trying to achieve, but if you know the name of the property you could use:

data['stdId'] = '';

or

data.stdId = '';

If you do not know the property name, but you still want to keep the property names on the object you could use:

for(var prop in data) {
  if(data.hasOwnProperty(prop)) {
    data[prop] = '';
  }
}

You can use for..in loop to iterate over data object using key.

for(var key in data){
  if(data.hasOwnProperty(key)){
     data[key] = '';
  }
}

Note: This will set every property of data object to ''

data.stdId = null;

or

data.stdId = '';

or

data = { stdId };

Have you tried those?

As I understand your question, you won't know the name of the key in each object and there is only ever one. To solve your problem:

data[Object.keys(data)[0]] = ''

This will assign the value of the key to null.