Typo in http://www.naildrivin5.com/blog/2012/07/17/adventures-in-functional-programming-with-ruby.html ?

gistfile1.rb

add_person = ->(person) {
  return [nil,"Name is required"]                  if String(person.(:name)) == ''
  return [nil,"Birthdate is required"]             if String(person.(:birthdate)) == ''
  return [nil,"Gender is required"]                if String(person.(:gender)) == ''
  return [nil,"Gender must be 'male' or 'female'"] if person.(:gender) != 'male' &&
                                                      person.(:gender) != 'female'

  id = insert_person.(person.(:name),person.(:birthdate),person.(:gender),person.(:title))
  # [new_person.(:with_id,id),nil] # <====
  [person.(:with_id,id),nil]       # <==== I think it should be this. Right?
}