Set all Object keys to false

Question

Lets say I have an object

  filter: {
    \"ID\": false,
    \"Name\": true,
    \"Role\": false,
    \"Sector\": true,
    \"Code\": false
  }

Answer 1

If you don't want to modify the array, here's an ES6 alternative that returns a new one:

Object.fromEntries(Object.keys(filter).map((key) => [key, false]))

Explanation:

Object.keys returns the object's keys:

Object.keys({ a: 1, b: 2 }) // returns ["a", "b"]

Then we map the result ["a", "b"] to [key, false]:

["a", "b"].map((key) => [key, false]) // returns [['a', false], ['b', false]]

And finally we call Object.fromEntries that maps an array of arrays with the form [key, value] to an Object:

Object.fromEntries([['a', false], ['b', false]]) // returns { a: false, b: false }