ES6SeriesPart2_ArrowFn&this8.js

// #1 ES6: if passing one argument you don't need to include parenthesis around parameter.
var kitty = name => name;

// same as ES5:
var kitty = function(name) {
  return name;
};

// #2 ES6: no parameters example.
var add = () => 3 + 2;

// same as ES5:
var add = function() {
  return 3 + 2;
};

// #3 ES6: if function consists of more than one line or is an object, include braces.
var objLiteral = age => ({ name: "Usagi", age: age });

// same as ES5:
var objLiteral = function(age) {
  return {
    name: "Usagi",
    age: age
  };
};

// #4 ES6: promises and callbacks.
asyncfn1().then(() => asyncfn2()).then(() => asyncfn3()).then(() => done());

// same as ES5:
asyncfn1().then(function() {
  asyncfn2();
}).then(function() {
  asyncfn3();
}).done(function() {
  done();
});

I think line 29 should be:
asyncfn1().then(() => asyncfn2()).then(() => asyncfn3()).done(() => done());
Right? :)

Great articles by the way!