Minimal unique ID generator written in Coffeescript

uniqid.coffee

uniqid = (->
  id = 0
  { get: -> id++ }
)()

uniqid.get() #= 0
uniqid.get() #= 1
uniqid.get() #= 2, and so on...

uniqid.js

// The CoffeeScript compiles to this:
var uniqid = (function() {
  var id;
  id = 0;
  return {
    get: function() {
      return id++;
    }
  };
})();

uniqid.get() //= 0
uniqid.get() //= 1
uniqid.get() //= 2, and so on...