Create new object from existing object with new values Angular / Ionic 3

Question

I am working on an Ionic 3 project,which uses Angular.

I have a JSON object like below called person. However, I have a Ionic toggle button which enables various sections based on whats returned from person.

person  = { name: "peter", job: "programmer", home: "somewhere"};

person_checked_values = {}

In order to update my toggles I need to pass a boolean. The keys are the same. How can I dynamically build a new object off of whats returned from person KEYs, but set the value as true so person_checked_values results like below?

person_checked_values  = { name: true, job: true, home: true};

I tried to foreach loop person and create a new object from that, but keep getting undefined and stumped. FWIW - I am using _lodash as well so if there is possibly someway to use help from that library its available.

user184994 · Accepted Answer · 2018-11-04 07:03:21Z

1

You can use Object.keys to get all of the keys. You can then combine that with the .reduce function of arrays to build an object.

let person = {
  name: "peter",
  job: "programmer",
  home: "somewhere"
};

let result = Object.keys(person).reduce((obj, key) => {
  obj[key] = true;
  return obj;
}, {})

console.log(result);

answered Nov 4, 2018 at 7:03

user184994

18.3k2 gold badges51 silver badges54 bronze badges

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

1 Comment

limit Over a year ago

Thanks, much appreciated. Works perfectly.

Collectives™ on Stack Overflow

Create new object from existing object with new values Angular / Ionic 3

1 Answer 1

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related