How to automate this object using JavaScript to set one key on each iteration as null?

Javascript Web Development Front End Technology Object Oriented Programming

For this, use Object.keys() and set one key on each iteration as null using a for loop..

Example

Following is the code −

var objectValues =
{
   "name1": "John",
   "name2": "David",
   "address1": "US",
   "address2": "UK"
}
for (var tempKey of Object.keys(objectValues)) {
   var inEachIterationSetOneFieldValueWithNull = {
      ...objectValues,
       [tempKey]: null
   };
   console.log(inEachIterationSetOneFieldValueWithNull);
}

To run the above program, you need to use the following command −

node fileName.js.

Here, my file name is demo294.js.

Output

This will produce the following output on console −

PS C:\Users\Amit\javascript-code> node demo294.js
{ name1: null, name2: 'David', address1: 'US', address2: 'UK' }
{ name1: 'John', name2: null, address1: 'US', address2: 'UK' }
{ name1: 'John', name2: 'David', address1: null, address2: 'UK' }
{ name1: 'John', name2: 'David', address1: 'US', address2: null }

AmitDiwan

Published on 09-Nov-2020 09:03:13

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