Singleton w/ closure

drewModule.js

var drewIsCool = false;

module.exports = {
	isDrewCool: function() {
		return drewIsCool;
	},

	makeDrewCool: function() {
		drewIsCool = true;
	}
};

example.js

var drewModule = require( './drewModule' );

console.log( drewModule.isDrewCool() ); // false
drewModule.makeDrewCool();
console.log( drewModule.isDrewCool() ); // true

var drewModule2 = require( './drewModule' );
console.log( drewModule2.isDrewCool() ); // true