Question

I need to create a variable from the value of another variable. As an example, this would be similar to how I would do this in VFP:

nameOfNextVar = "port_no_1";
eval(nameOfNextVar) = 7493

Then I will be able to say:

alert(port_no_1);

And the alert would give me 7493…

Is this possible in JavaScript???

TIA

Dennis

Answer 1

You can try something like this using JavaScript eval method. But using eval should be avoid if possible.

var nameOfNextVar = "port_no_1";
eval(nameOfNextVar + " = " + 7493);
alert(port_no_1)​;​

http://jsfiddle.net/ngTQf/

Other alternative is to define properties on the object or a current instance. You can also use window to define variables or properties.

var nameOfNextVar = "port_no_1";
this[nameOfNextVar] = 7493;
alert(this.port_no_1);

window[nameOfNextVar] = 7493
alert(window.port_no_1); 

http://jsfiddle.net/ngTQf/2/