getUser example for method overloading example

getUserExample.coffee

getUser = (*) ->
  (name) when typeof name is 'string' ->
    User.lookup 'name', name
  (id) when typeof id is 'number' ->
    User.lookup 'id', id
  ->
    throw new Error "invalid arguments"

getUserExample.js

getUser = function() {
  if ((function(name) {
    return typeof name === 'string';
  })(arguments[0])) {
    return (function(name) {
      return User.lookup('name', name);
    })(arguments[0]);
  } else if ((function(id) {
    return typeof id === 'number';
  })(arguments[0])) {
    return (function(id) {
      return User.lookup('id', id);
    })(arguments[0]);
  } else {
    throw new Error("invalid arguments");
  }
}