Elixir Maps & Structs

tl;dr

Maps

iex> map = %{a: 1, b: 2}
%{a: 1, b: 2}
iex> map[:a]
1
iex> %{map | a: 3}
%{a: 3, b: 2}
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Structs

Defining it in the Elixir REPL:

iex> defmodule User do
...>   defstruct name: "John", age: 27
...> end
iex> %User{}
%User{age: 27, name: "John"}
iex> %User{name: "Jane"}
%User{age: 27, name: "Jane"}
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