arraysangulartypescriptboolean

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

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?

Solution

  • 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);