How to get function parameter names/values dynamically?

Question

Is there a way to get the function parameter names of a function dynamically?

Let’s say my function looks like this:

function doSomething(param1, par         


        

Answer 1

Whatever the solution, it must not break on wierd functions, whose toString() looks just as wierd:

function  (  A,  b
,c      ,d
){}

Also, why use complex regular expressions? This can be done like:

function getArguments(f) {
    return f.toString().split(')',1)[0].replace(/\s/g,'').substr(9).split(',');
}

This works everywhere with every function, and the only regex is whitespace removal that doesn't even process the whole string due to the .split trick.