creating variable names from parameters in javascript

Question

I was wondering if it is possible to create variable names from parameters passed to a function in javascript. Something like this:

function createVar(number) {
var "number" + number;
}
createVar(1)

I'm new to Stack Overflow and programming, so any help would be appreciated.

Answer 1

You could attach this to the window object, but note it will be global. For example:

function createVar(varName, value) {
    window[varName] = value;
}

createVar("test", "Hello World");
alert(test); // Outputs "Hello World".

Answer 2

It is possible to interpret Object as associative array where you specify index and get value by name of index ( hash ):

var x = Array();
x[number] = value;

Single variable name is for programmer, and the code would be hard to maintain and understand when you set variable dynamically in code.

Answer 3

Honestly, I don't see why this would ever be useful, because every time you want to use the variable you'd have to search for it with your number argument.

However, you can do it, albeit not the exact way you had described:

function createVar(number){
  eval("var number" + number.toString() + ";");
}

however, this variable will only be accessible within the function, to make it global assign to the window object:

function createVar(number){
  window["number" + number] = 15; // creates "global" variable
}

As I've stated before, however, I don't see this being useful, [i]ever[/i], if you want to stratify values by numbers you'd be much better off with an array.