defmodule User do
  defstruct name: "Dane", age: 31
end

# iex(2)> %User{}
# %User{name: "Dane", age: 31}
# iex(3)> %User{name: "Jessica"}
# %User{name: "Jessica", age: 31}
# iex(4)> %User{}
# %User{name: "Dane", age: 31}
#
# iex(5)> person = %User{}
# %User{name: "Dane", age: 31}
# iex(6)> person.name
# "Dane"
# iex(7)> jessica = %{person | name: "Jessica"}
# %User{name: "Jessica", age: 31}
# iex(8)> jessica.name
# "Jessica"
# iex(9)> %User{}
# %User{name: "Dane", age: 31}


defmodule Car do
  @enforce_keys [:make]
  defstruct [:model, :make]
end