如何将javascript函数定义为变量中的变量

Question

I'm trying to create a callback function in response to a JSONP request in Node.

I receive callbackName as a String, and I have an Object (lets say var obj = {a : "b"}) I need to return the following :

callbackName({a : "b"});

I tried concatenating strings - but I got

"callbackName([Object object])"; 

I tried JSON.Stringify but got:

"callbackName({\"a\":\"b"});"

which is close - but it's all stringy. Is there a way to get exactly what I want?

UPDATE

The code I'm using - which is in an AWS Lambda Function (turns out this is rather significant!)

    context.succeed(request.callback + "(" + JSON.stringify(obj) + ");");

As mentioned below - Lambda expects an Object in succeed, which it calls JSON.Stringify on.

Any ideas on how I could proceed?

Answer 1

If I understand your question, then you need something like this:

var obj = {a:"b"};
var callbackName = "callback";

var scope = {};

scope.callback = function(e) {
    return function() {
        console.log(e);
    }
}

setTimeout( scope[callbackName](obj), 1000 );