Iterating object objects correctly in JavaScript

Question

var obj = {a: 1, b: 2, c:3}    

Object.keys(obj).forEach(function(x){
    console.log(obj[x])
})

This gives: 1 2 3

so how can I make it to work give me 1 4 9 (e.g. times by itself) I thought this would work

Object.keys(obj).forEach(function(x){
    console.log(obj[x*x])
})

that would try to take the ninth value, try something like `obj[x]*obj[x]` — iHasCodeForU, Dec 16 '16 at 15:49
use [Math.pow](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/pow) `console.log(Math.pow(obj[x], 2));` — Shubh, Dec 16 '16 at 15:51
Possible duplicate of [Iterating over objects in Javascript](http://stackoverflow.com/questions/8389148/iterating-over-objects-in-javascript) — Heretic Monkey, Dec 16 '16 at 17:01

BenG · Accepted Answer · 2016-12-16T15:51:46.803

3

you need to multiply the values.

you have x*x which would be 'a'*'a' results in NaN.

obj[NaN] = undefined

var obj = {a: 1, b: 2, c:3}

Object.keys(obj).forEach(function(x){
    console.log(obj[x] * obj[x])
})

edited Dec 16 '16 at 15:51

answered Dec 16 '16 at 15:49

BenG

score 0 · Answer 2 · answered Dec 16 '16 at 15:51

0

You're almost there. this one does the job:

Object.keys(obj).forEach(function(x){
    console.log(obj[x]*obj[x])
 })

answered Dec 16 '16 at 15:51

score 0 · Answer 3 · answered Dec 16 '16 at 16:56

0

you can use Object.values in ES2016

Object.values(obj).forEach(function(x){
   console.log(x*x);
})

answered Dec 16 '16 at 16:56

Darshan

score 0 · Answer 4 · answered Dec 16 '16 at 16:58

0

var obj = {a: 1, b: 2, c:3}

Object.keys(obj).forEach(function(x){
    console.log(Math.pow(obj[x], 2));
})

Math.pow (x,y) => xxx*...y times...*x

answered Dec 16 '16 at 16:58

LellisMoon

4 Answers4