Add value in array object

Question

I have this array

var labels = ["Hat", "Chair", "Pen"];

and I want the output

var output = {"Hat": true, "Chair": true, "Pen": true};

how to convert this in javascript

Thanks

The second `labels` output should be object, right? It's invalid array now. — Derek Wang, Oct 29 '20 at 13:42
[Duplicate](https://www.google.com/search?q=site%3Astackoverflow.com+js+convert+array+to+object+of+boolean+properties) of [Convert an array into object boolean](https://stackoverflow.com/q/51003654/4642212). — Sebastian Simon, Oct 29 '20 at 13:54
``` var output = labels.reduce((output, label) => { output[label] = true; return output}, {}) ``` — A.DUPONCHEL, Oct 29 '20 at 13:56
@A.DUPONCHEL That’s not how reducer functions work. You’re not returning the aggregator object. — Sebastian Simon, Oct 29 '20 at 13:57

Majed Badawi · Answer 1 · 2020-10-29T13:51:30.190

1

You can use .reduce:

var labels = ["Hat", "Chair", "Pen"];

const obj = labels.reduce((acc,e) => {
  acc[e] = true;
  return acc;
}, {});

console.log(obj);

edited Oct 29 '20 at 13:51

answered Oct 29 '20 at 13:45

Majed Badawi

score 0 · Accepted Answer · answered Oct 29 '20 at 13:44

0

var labels = ["Hat", "Chair", "Pen"];
let labelsObject = {};
labels.forEach(label => {
  labelsObject[label] = true;
})

console.log(labelsObject)

answered Oct 29 '20 at 13:44

Bulent

2 Answers2