Discussion on: Refactoring: My 6 favorite patterns

[Peter Hoffmann]

While still refactoring I'd suggest to replace in the second example (example 5)

(user) => {
  if(user.lastPayment >= moment().startOf('week').toDate()) {
    return true;
  }
  return false;
}

with

function (user) {
    return user.lastPayment >= moment().startOf('week').toDate()
}

and don't forget, that arrow functions don't create their own this-scope.