gistfile1.js

// bah.js

module.exports.bah = function(){
  function ponies(){
		return "hai";
	}
};


// test.js

var bah = require("./bah");
console.log(bah.ponies());

you're assigning the proprety "bah" on the exports object to be a function. That function contains a definition of a function called "ponies" but its not assigned to a property of bah so you can't access it in this way.

if you just want to export the ponies function, easiest way is to just do

module.exports.ponies = function(){return "hai";}

then you can do

var bah = require("./bah"); // bah is assigned the "module.exports" object from bah.js file which has ponies property
console.log(bah.ponies());

a good way to sanity check this stuff is to fire up the node repl and do require("./bah.js") and it will show you what is being exported