是否有可能通过javascript中的函数名称获取参数

Question

For example, I have a function defined as below:

var fn1 = function(obj, p1, p2) {}

Is it possible to get this function's parameters by the function name fn1 outside fn1?
I want to make a new fn2(p1, p2) dynamically and in this function passing the obj to call fn1 ?
Anyone help on this? Many thanks.

Answer 1

You don't need to pass the scope to the function like this:

var fn1 = function(scope, p1, p2) {}

I belive what you want is something like the call method. The call method is used to call a method on behalf of another object. It allows you to change the this object of a function from the original context to the new object specified by first arg. call Method Ref. - JS

Here some example:

var fn1 = function(p1,p2){};

var fnThatCall = function(p1,p2){
   var scpe = this;
   fn1.call(scope,p1,p2);
};