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[web] Javascript: Variable's Variable

General and Gameplay Programming Programming

Started by ENEX August 16, 2005 07:20 AM

2 comments, last by Fuzztrek 18 years, 8 months ago

ENEX

199

Author

August 16, 2005 07:20 AM

I have no idea on how to put a variable in a variable's name, tried something like var1+var2 = 'something' and some other combinations. Please help!

Current Project: Espion Online

benryves

2,001

August 16, 2005 08:19 AM

eval() might be what you're looking for - it allows you to execute a string as if it was a piece of JavaScript. For example:

var test_var = 'Hello'; // Our test variablevar var_name = 'test_var'; // Set var_name to equal the name of our test variableeval(var_name+"='Goodbye'"); // "eval()" some code that changes the value in our test variablealert(test_var);

displays a message box that says 'Goodbye' on it.

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ENEX

199

Author

August 16, 2005 09:21 AM

Thanks! Just did eval("pInfo"+part_num+"='hi'"); and it worked perfectly!

Current Project: Espion Online

Fuzztrek

572

August 16, 2005 01:18 PM

Eval is pretty inefficient, though, so if you can find any other way to do what you want, use that instead. I'm not sure of the context of your code, but you could probably get by using an array (where the key is the part number).