CODEWITHSUNDEEP
javascript
Matteo Pagliazzi
Matteo Pagliazzi

Reputation: 5260

Javascript: give a variable a name made of 2 variables

I want to create a new variable in javascript but it's name should made of a stale part and a variable one like this:

tab_counter = 1;
var editor + tab_counter = blabla

well i want the new variable name to be in this case editor1, is this possible?

Upvotes: 1

Views: 2151

Answers (4)

sky-dev
sky-dev

Reputation: 6258

It seems like you may want to consider using a Dictionary for something like this. This link which references this link describes your options there.

Upvotes: 0

Birey
Birey

Reputation: 1802

It is possible

var tab_counter=1;
eval("var editor"+tab_counter+"='blah'")
alert(editor1);
eval("var editor"+tab_counter+1+";")
editor2='blahblah';
alert(editor2);

http://jsfiddle.net/5ZLYe/

Upvotes: 2

El Ronnoco
El Ronnoco

Reputation: 11922

You can do the eval method used by Birey or you can create a custom property of an object such as...

obj[editor + tab_counter] = blabla;

But it sounds like you're going about doing whatever you're doing in a particularly horrible way. If you just want to store multiple items which you can index into use an array...

var array = [];
array[0]  = blabla;
array[1]  = blabla2;

alert(array[0]); //shows value of blabla
alert(array[1]); //shows value of blabla2

Upvotes: 1

Pointy
Pointy

Reputation: 413737

You cannot create a stand-alone variable name that way (except as a global) (edit or except with eval()), but you can create an object property:

var tab_counter = 1;
var someObject = {};
someObject['editor' + tab_counter] = "bla bla";

You can create globals as "window" properties like that, but you probably shouldn't because global variables make kittens cry.

(Now, if you're really just indexing by an increasing counter, you might consider just using an array.)

edit also see @Birey's somewhat disturbing but completely correct observation that you can use "eval()" to do what you want.

Upvotes: 6

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