convert string to function

austinf · June 23rd, 2006, 12:14 AM

hi i have a var which takes a value based on a split, this value is nothing the but the name of a function to be called.

consider the code

Code:

var searchFn = "fnCallCal";

searchFn(name)

now the thing is the above will not work because it si a string so i need to know how to convert this from string to an function call.

thanks

joefawcett · June 23rd, 2006, 02:12 AM

If you code is in a browser then:

Code:

window[searchFn](name);

should do.
If not then use the Function object:

Code:

var fn = new Function("term", "return " + searchFn + "(term);");
fn(name);

--

Joe (Microsoft MVP - XML)

picrap · May 26th, 2007, 07:47 AM

Hi,

there is a simple way to do this:

Code:

var searchFn = "fnCallCal";

// searchFn(name)
// the eval() method returns a function objet, so you can use the result as a function

eval(searchFn)(name);

Cheers,
Pascal.

KM · September 19th, 2008, 03:25 AM

hi,
My requiremnet is same in QTP .
I need to call different functions based on the an input..means.. if input is x call functx(j) is input is y call functy(j) so i tried these methods..it would nt work

then i tried
"var searchFn = "fnCallCal";

// searchFn(name)
// the eval() method returns a function objet, so you can use the result as a function

eval(searchFn)(name);"

and it worked ... but when if you need to pass parameters it is not taking it the way wriiten in code..

here is wat i coded

searchfn= "test"&i&"(j)

eval(searchfn)

so it called test1(j)
test2(j)

..

thanks a lot fellas for this code..as i was in a real fix when i found this and it helped a lot... :)
hope this helps others too....:)

-KM