Hello there,

I'm learning lots of javascript these days, and one of the things I'm not quite understanding is passing functions as parameters to other functions. I get the concept of doing such things, but I myself can't come up with any situations where this would be ideal?

My question is:

When do you want to have your javascript functions take another function as a parameter? Why not just assign a variable to that functions return value and pass that variable to the function like so:

// Why not do this
var foo = doStuff(params);
callerFunction(foo);

//instead of this
callerFunction(doStuff);

I'm confused as to why I would ever choose to do things as in my second example.

Why would you do this? What are the use cases?

Thanks!!