extract fields from object

Question

If I have this:

var myObj = [
  { name: 'A', number: 'b1',level: 0 },
  { name: 'B', number: 'b2',level: 0 },
];

How can I extract all the names like:

"names": {
  'A',
  'B'
}

The desired result isn't a valid object. You'd probably have to manually build that representation as a string. It's not really clear what you're actually trying to accomplish here. — David
– David, Commented Jun 10, 2016 at 16:17
Besides you can't have just names: { 'Mike', 'Rik', 'Tom' }, as all values inside names would become key, and they need to have values. — Don
– Don, Commented Jun 10, 2016 at 16:19
Seconding what @David said, an object in javascript is like a map in java, meaning there has to be a value mapped to a key. what you want is not a valid object. — Rahul Sharma
– Rahul Sharma, Commented Jun 10, 2016 at 16:19
Objects are key-value pairs. So for each key ('Mike', 'Rik', 'Tom') you need a matching value ('Mike': 'C'). If you just want a list of "keys" with no matching values, then you want an array. — Mike Cluck
– Mike Cluck, Commented Jun 10, 2016 at 16:25

trincot · Accepted Answer · 2016-06-10 19:31:18Z

0

You could use this function to get an array of values, not object properties (which are not suited for that):

function getColumn(arr, column) {
    return arr.map(function (rec) { return rec[column] });
}

// Sample data
var myObj = [
  { name: 'A', number: 'b1',level: 0 },
  { name: 'B', number: 'b2',level: 0 },
];

// Get names
var names = getColumn(myObj, 'name');

// Output
console.log(names);

answered Jun 10, 2016 at 19:31

trincot

357k38 gold badges282 silver badges338 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

extract fields from object

1 Answer 1

Comments

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Linked

Related