easytip: an object as a function of its messages.

I just found this one, not really a stunning pattern, but it could be useful for someone that needs to use just one function name to multiple purposes:

var adam = (function() {
 var firstname = "Adam";
 var lastname = "of Eden";
 return function(message) {
 switch (message) {
 case "getFirstName":
 return firstname;
 case "getLastName":
 return lastname;
 case "getFullName":
 return firstname + " " + lastname;
 default:
 throw "unknown message: " + message;
 }
 };
}());

adam("getFirstName"); // "Adam"
adam("getLastName"); // "of Eden"
adam("getFullName"); // "Adam of Eden"
adam("getTestName"); // "unknown message: getTestName"

credits to the great @petermichaux:

https://gist.github.com/4431905