Designing Elixir Systems with OTP/

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Maps and Structs

Maps and Structs

Let’s learn about some of the properties of maps and structs in Elixir.

We'll cover the following...

Introduction

The map has rapidly become the go-to data structure for Elixir programmers. For this lesson, we’re going to treat maps and structs as basically the same thing. In iex, we can see that a struct is implemented as a map. Let’s take a peek under the hood by running the following commands in the iex terminal:

Executable

Press + to interact
defmodule User do
defstruct [:name, :email] 
end
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map = %User{}
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is_map(map)
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map.__struct__

Output

iex(1)> defmodule User do
...(1)> defstruct [:name, :email] 
...(1)> end
{:module, User, . . . }
iex(2)> map = %User{}
%User{email: nil, name:
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