Convert Boolean Value with true into an array in Angular4 (Typescript)

Question

I am getting a set of boolean values from my microservice.

   "mon": true,
   "tues": false,
   "wed": false,
   "thurs": true,
   "fri": false,
   "sat": true,
   "sun": false,

And I need to convert the values with boolean value true to an array like following:

options = ['mon', 'thurs', 'sat']

How can I do it?

Ankit Agarwal · Accepted Answer · 2018-12-20 08:49:31Z

2

You need to use filter on the object keys for those days key:

var day = {
  "mon": true,
  "tues": false,
  "wed": false,
  "thurs": true,
  "fri": false,
  "sat": true,
  "sun": false
};

var res = Object.keys(day).filter(key => day[key]);
console.log(res);

answered Dec 20, 2018 at 8:49

Ankit Agarwal

30.8k5 gold badges41 silver badges63 bronze badges

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

1 Comment

Ankit Agarwal Over a year ago

@ChanYoongHon glad to help. You can tick mark the answer if it was helpful to you

brunnerh · Accepted Answer · 2018-12-20 08:47:40Z

0

You can filter the keys:

const obj = {
    "mon": true,
    "tues": false,
    "wed": false,
    "thurs": true,
    "fri": false,
    "sat": true,
    "sun": false,
};
const options = Object.keys(obj).filter(key => obj[key]);

console.log(options);

answered Dec 20, 2018 at 8:47

brunnerh

188k30 gold badges362 silver badges434 bronze badges

Comments

General Grievance · Accepted Answer · 2024-12-12 17:10:27Z

0

Just another way with entries and array destructure

let day = {
  "mon": true,
  "tues": false,
  "wed": false,
  "thurs": true,
  "fri": false,
  "sat": true,
  "sun": false
};

let result = Object.entries(day).filter(([key, state]) =>state).map(([key]) => key);

console.log(result);

edited Dec 12, 2024 at 17:10

General Grievance

5,12039 gold badges39 silver badges60 bronze badges

answered Dec 20, 2018 at 9:14

Muhammed Albarmavi

24.5k9 gold badges72 silver badges92 bronze badges

Collectives™ on Stack Overflow

Convert Boolean Value with true into an array in Angular4 (Typescript)

3 Answers 3

1 Comment

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

1 Comment

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related