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Elixir Cookbook

Elixir Cookbook

By : Paulo Pereira
4.5 (2)
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Elixir Cookbook

Elixir Cookbook

4.5 (2)
By: Paulo Pereira

Overview of this book

This book is intended for users with some knowledge of the Elixir language syntax and basic data types/structures. Although this is a cookbook and no sequential reading is required, the book’s structure will allow less advanced users who follow it to be gradually exposed to some of Elixir’s features and concepts specific to functional programming. To get the most out of this book, you need to be well versed with Erlang.
Table of Contents (11 chapters)
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10
Index

Sending messages between processes


In Elixir, communication between processes is performed via message passing. Each process has a mailbox where messages from the "outside" world are placed, waiting to be processed. Once that happens, if a response is required, another message will be sent, and another mailbox will get a message!

Getting ready

To get started, go to the code repository where the messages.ex file is located and open a new IEx terminal session. The IEx terminal session will also be an actor in this recipe! We will send messages from it to the process containing the code defined in the module.

How to do it…

Follow these steps to send messages between processes:

  1. Once our session is started, load and compile the messages.ex module:

    iex(1)> c "messages.ex"
    [Messages]
    
  2. Next, spawn a new process containing the code from our module:

    iex(2)> {:ok, pid} = Messages.start_link
    {:ok, #PID<0.61.0>}
    
  3. To make things easier, we will register our newly spawned process with a name:

    iex...

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