Module Pattern - How to avoid using `this` and When you need to use `this`

0-avoiding-this.js

module.exports = (function() {
  var name = 'Ray';
  var age = 32;

  function doSomethingGreat() {
    console.log(name);
    console.log(age);
    anotherGreatness();
  }

  function anotherGreatness() {
    console.log(name);
    console.log(age);
    doSomething();
  }

  return {
    doSomethingGreat: doSomethingGreat,
    anotherGreatness: anotherGreatness,
    name: name,
    age: age
  };
})();

1-inbetween.js

module.exports = (function() {
  var foo = {
    name: "Ray",
    age: 32,
    doSomethingGreat: function () {
      console.log(foo.name);
      console.log(foo.age);
    },
    anotherGreatness: function() {
      console.log(foo.name);
      console.log(foo.age);
      foo.doSomethingGreat();
    }
  }

  return foo;
})();

2-using-this.js

module.exports = (function() {
  return {
    name: "Ray",
    age: 32,
    doSomethingGreat: function () {
      console.log(this.name);
      console.log(this.age);
    },
    anotherGreatness: function() {
      console.log(this.name);
      console.log(this.age);
      this.doSomethingGreat();
    }
  };
})();