Convert object key into variable

Question

I know how to use objects, but I wonder... Is it possible to convert object key like this:

{"fname":"peter", "lastname":"parker"}

Into this?

var fname = "peter";
var lname = "parker";

Why would you do this? Simply access to the object property? Like this: var fname = yourobject.fname; var lname = yourobject.lastname; — briosheje
– briosheje, Commented Aug 4, 2014 at 7:14
You can create global variables from the above by attaching properties into the window object (if you are on a browser based execution environment). You cannot possibly introduce dynamically named function scoped (local) variables. — techfoobar
– techfoobar, Commented Aug 4, 2014 at 7:14
While this is possible, I would strongly suggest instead assigning the object to a variable with a short name and then doing o.fname instead of fname. — user2357112
– user2357112, Commented Aug 4, 2014 at 7:14
The only solution that may come to my mind involve creating a closure with manually written argument names - nothing really usable. It's not that we all never thought about it, mind you. But in the end it's not just worth the effort. — MaxArt
– MaxArt, Commented Aug 4, 2014 at 7:17

J.S.R - Silicornio · Accepted Answer · 2020-02-13 15:06:42Z

5

I know it is old question but a method you could use is:

const obj = {"fname":"peter", "lastname":"parker"};
const { fname, lastname } = obj;
console.log(fname); // prints "peter"
console.log(lastname); // prints "parker"

Maybe it helps to someone.

answered Feb 13, 2020 at 15:06

J.S.R - Silicornio

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Comments

Malekai · Accepted Answer · 2023-08-22 22:06:29Z

-1

Try this to fetch the keys of an object:

var keys = Object.keys({
  fname: "peter",
  lastname: "parker"
});

It returns an array with a length of 2, which looks like this:

// keys[0] === "fname";
// keys[1] === "lastname";

edited Aug 22, 2023 at 22:06

Malekai

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answered Aug 4, 2014 at 7:18

Super Hornet

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