Javascript: pick only certain properties in Object

Question

I have configuration object for my features:

const features = {
    "feature1": {
        "value": 1,
        "description": ""
    },
    "feature2": {
        "value": 2,
        "description": ""
    }
}

How to transform it to feature/value format like

{"feature1": 1, "feature2": 2}

My variant is below, but I feel it's not elegant

let config = {};

config = Object.keys(features).map(
    k  => config[k] = flags[k]["value"]
);

Nenad Vracar · Accepted Answer · 2017-08-20 17:39:45Z

1

You can use ES6 spread syntax with Object.assign() and map().

const features = {"feature1":{"value":1,"description":""},"feature2":{"value":2,"description":""}}

var result = Object.assign({}, ...Object.keys(features).map(k => ({[k]: features[k].value})))
console.log(result)

Or you can use Object.keys() and reduce()

const features = {"feature1":{"value":1,"description":""},"feature2":{"value":2,"description":""}}

var result = Object.keys(features).reduce((r, e) => (r[e] = features[e].value, r), {})
console.log(result)

answered Aug 20, 2017 at 17:39

Nenad Vracar

122k16 gold badges160 silver badges184 bronze badges

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

1 Comment

Nadeem Over a year ago

Another handy way SelectQL.js is inspired by Structured Query Language (SQL) for accessing and manipulating Objects in an easy and familiar way. It supports complex Objects and Arrays using Builder Design Pattern. npmjs.com/package/selectql.js

Collectives™ on Stack Overflow

Javascript: pick only certain properties in Object

1 Answer 1

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related