is it possible to divide JavaScript variable?

Question

Like, I've a condition like this:

var a="avar", b=3;
var a+b="some value";
// expecting to make, avar3="some value";

Is it possible somehow? Or any alternative way?

What are you trying to achieve with this? Why don't you just `var avar3`? — Aleksei Zabrodskii, Aug 29 '13 at 06:41
What is the purpose of this? You can always use objects as dictionaries and add properties that way. You can also do that with the global object (`window` in the browser). There's generally little reason to do that, however. — JayC, Aug 29 '13 at 06:46

score 5 · Accepted Answer · answered Aug 29 '13 at 06:40

5

You can do:

var a="avar", b=3;
window[a+b]="some value";

This will declare a global variable avar3 with value "some value"

answered Aug 29 '13 at 06:40

omma2289

2

It's important to note that here, `window` refers to the global object. In a browser, it is `window`, but the same might not necessarily carry over to other JavaScript applications (e.g., Node.js). – Matt Patenaude Aug 29 '13 at 06:42
Just what I wanted :) thanks – Aritra Hazra Aug 29 '13 at 06:52

score 2 · Answer 2 · answered Aug 29 '13 at 06:45

2

This:

function ns() { return this; }

var a="avar", b=3;
ns()[a+b] = "some value";

alert(avar3);

will create variable with the name "avar3" in current namespace.

answered Aug 29 '13 at 06:45

c-smile

score 1 · Answer 3 · answered Aug 29 '13 at 06:43

1

No Doesn't work like that.

i dont know if this if what you're trying to do but:

var c=a+b; c="some value";

answered Aug 29 '13 at 06:43

JohnnyHunter

score 0 · Answer 4 · answered Aug 29 '13 at 06:42

0

you can use object properties for something like this

 var obj = { a: 'avar', b:'3'};
 obj[obj.a+obj.b]='some value';
 console.log(obj.avar3);  //the output is 'some value'

answered Aug 29 '13 at 06:42

4 Answers4