to make javascript object method public

obj-method-public.js

var hey = {};

(function() {
  function woot() {
    return 'hi';
  }

  function who() {
    return 'me';
  }

  hey.woot = woot;
})();

// outputs: hi
console.log(hey.woot());

// outputs: who is not defined
console.log(who());
console.log(hey.who());

pattern for making a method public and leaving others as private