How do you convert a string into a variable/function reference?

JavaScript
1

Suppose I pass a string as an argument to a function, but I want that string to represent a variable or a function (assume no scope issues).

How can I accomplish this?

2

Can you post some code so we can see a little more clearer? :slight_smile:

3

eval(“blah”) or window[“blah”] for globals.

4

eval(“xyz(” + i + “)”);

assuming i = 10, this is equivalent to
xyz(10);

5

I knew of eval, will that also work for function names?

Say I pass “Math.sin” to a function argument of myFunc.

Would: eval(myFunc(Math.PI)); give me 0 as it should?

Also, what about this situation:

var a = 123;
var b = 456;
function testFunc(var1, var2) {

}

If I pass “a” or “b” as var1 or var2, how can I get them to point to the variables of the same name and not be strings? I could put everything in an object and handle it that way, but I’d rather not. I’ve also used a switch with a third variable:

switch(var1) {
case “a”: value = 123;
case “b”: value = 456;
}

value being the extra variable.
Is there a more efficient way to accomplish that?

Thanks,
Shane