Use parameter in the key object

Question

I have something like that:

add(messenger) {
  switch (messenger) {
    case 'skype':
      this.messengers = _.assign(this.messengers, {skype: ''})
      break
    case 'telegram':
       this.messengers = _.assign(this.messengers, {telegram: ''})
       break
  }
}

But are there ways to make it shorter? Like this:

add(messenger) {
  this.messengers = _.assign(this.messengers, {messenger: ''})
},

Use bracket notation: `_.assign(this.messengers, {[messenger]: ''})`. — CRice, Sep 13 '18 at 20:22
Maybe: Possible duplicate of [Add a property to a JavaScript object using a variable as the name?](https://stackoverflow.com/questions/695050/add-a-property-to-a-javascript-object-using-a-variable-as-the-name) — CRice, Sep 13 '18 at 20:24

score 1 · Accepted Answer · answered Sep 13 '18 at 20:22

1

using ES6, you can do this.

add(messenger) {
    this.messengers = _.assign(this.messengers, { [messenger]: '' });
}

answered Sep 13 '18 at 20:22

oosniss

440
1
7
14

score 0 · Answer 2 · answered Sep 13 '18 at 20:22

0

Yup, you can set a key to a variable value using square brackets, like so:

this.messengers = _.assign(this.messengers, {[messenger]: ''})

answered Sep 13 '18 at 20:22

Steve Archer

641
4
10

Use parameter in the key object

2 Answers2