Invert object values javascript

Question

lets say I have an object that looks like this.

{
    source : 1,
    target : 0
}

The object is generated on the fly as part of some data that drives a d3.js visualisation. The object indicates the link between 2 data sets in another object.

I have a filter in my visualisation that shows the data as if it were coming from a different source, so basically the link data needs to invert. Sources become targets and targets become sources so it would need to look like this,

{
    source : 0,
    target : 1
}

Is there a better way of doing then looping through my object and on each interation getting the source and target storing them in variables and then reassigning them?

You mean something like this, temp=a; a=b; b=temp; if so then this is the only way you can swap values — GraveyardQueen, Nov 15 '16 at 08:59
http://stackoverflow.com/questions/23013573/swap-key-with-value-json look at this. — Dhaval Soni, Nov 15 '16 at 09:11
d3 doesn't allow you to add an extra translate step where you could do this conversion? Any chance you could show more about how/where you are manipulating the data, and where you make the current transform/translations? — Icepickle, Nov 15 '16 at 09:41

score 0 · Answer 1 · answered Nov 15 '16 at 09:22

You could get the keys and swap the values wit the help of a temp variable.

var object = { source: 1, target: 0 },
    temp,
    keys = Object.keys(object);

temp = object[keys[0]];
object[keys[0]] = object[keys[1]];
object[keys[1]] = temp;

console.log(object);

ES6 with destructuring

var object = { source: 1, target: 0 },
    keys = Object.keys(object);

[object[keys[0]], object[keys[1]]] = [object[keys[1]], object[keys[0]]];

console.log(object);

Invert object values javascript

1 Answers1