Describe how we can build modules in javascript.

We can not only utilize functions/closures for re-use, but also for
scoping and namespacing.

Author: danielmiladinov

modules.js

@@ -0,0 +1,45 @@
+// Javascript functions let you create modules
+// which help prevent naming conflicts
+
+// Define a function which instantiates an object, its public and
+// private methods, and immediately execute it (it returns the object)
+NAMESPACE.module = (function () {
+    var privateVariable;
+
+    function privateFunction(x) {
+        // do something with x and privateVariable
+    }
+
+    return {
+        // public functions!
+        firstMethod: function (a, b) {
+            // privateVariable has scope here, not just a & b
+        },
+
+        secondMethod: function (c) {
+            // you can call privateFunction here as well
+        }
+    };
+}());
+
+
+// Or, a variation on the above could look like this:
+(function() {
+    var privateVariable;
+
+    function privateFunction(x) {
+        // do something with x and privateVariable
+    }
+
+    GLOBAL.firstMethod = function (a, b) {
+        // privateVariable has scope here, not just a & b
+    };
+
+    GLOBAL.secondMethod = function (c) {
+        // you can call privateFunction here as well
+    };
+}());
+
+// Please note that in this second example, the outermost parentheses
+// are REQUIRED in order for it to be a function expression and not just
+// a function statement.