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Phoenix is a web development framework written in Elixir which implements the server-side Model View Controller (MVC) pattern. Many of its components and concepts will seem familiar to those of us with experience in other web frameworks like Ruby on Rails or Python's Django. Phoenix provides the best of both worlds - high developer productivity and high application performance. It also has some in

This document outlines general guidelines for those writing and publishing Elixir libraries meant to be consumed by other developers. Getting startedYou can create a new Elixir library by running the mix new command: $ mix new my_library The project name is given in the snake_case convention where all letters are lowercase and words are separate with underscores. This is the same convention used b

View Source Deploying on Heroku What we'll need The only thing we'll need for this guide is a working Phoenix application. For those of us who need a simple application to deploy, please follow the Up and Running guide. Goals Our main goal for this guide is to get a Phoenix application running on Heroku. Limitations Heroku is a great platform and Elixir performs well on it. However, you may run in

Development environment Before you create your first Nerves project or explore Nerves with Livebook, you will need to make sure to install some system packages required by the Framework, Platform, and Tooling. Nerves + Livebook The best path to exploring Nerves for the first time is by setting up the Nerves Livebook project. This allows you to try out the Nerves project on real hardware without ne

Once we have a working application, we're ready to deploy it. If you're not quite finished with your own application, don't worry. Just follow the Up and Running Guide to create a basic application to work with. When preparing an application for deployment, there are three main steps: Handling of your application secretsCompiling your application assetsStarting your server in productionIn this gui

HexDocs is a place for Hex packages to host their documentation. Finding documentation Find packages To find documentation sets on HexDocs, you can go to the following URLs: https://hexdocs.pm/<package>/ - Latest documentation set for package Example: https://hexdocs.pm/ecto/ https://hexdocs.pm/<package>/<version> - Documentation set for package at version Example: https://hexdocs.pm/ecto/1.1.9/ Y

In this guide, we will build a complete Elixir application, with its own supervision tree, configuration, tests, and more. The requirements for this guide are (see elixir -v): Elixir 1.15.0 onwardsErlang/OTP 24 onwardsThe application works as a distributed key-value store. We are going to organize key-value pairs into buckets and distribute those buckets across multiple nodes. We will also build a

Typespecs are not set-theoretic typesElixir is in the process of implementing its own type system based on set-theoretic types. Typespecs, which are described in the following document, are a distinct notation for declaring types and specifications based on Erlang. Typespecs may be phased out as the set-theoretic type effort moves forward. Elixir is a dynamically typed language, and as such, type

In this chapter we will learn more about Elixir basic types: integers, floats, booleans, atoms, and strings. Other data types, such as lists and tuples, will be explored in the next chapter. iex> 1 # integer iex> 0x1F # integer iex> 1.0 # float iex> true # boolean iex> :atom # atom / symbol iex> "elixir" # string iex> [1, 2, 3] # list iex> {1, 2, 3} # tupleBasic arithmeticOpen up iex and type the

In the previous chapter about GenServer, we implemented KV.Registry to manage buckets. At some point, we started monitoring buckets so we were able to take action whenever a KV.Bucket crashed. Although the change was relatively small, it introduced a question which is frequently asked by Elixir developers: what happens when something fails? Before we added monitoring, if a bucket crashed, the regi

Defines a Phoenix Channel. Channels provide a means for bidirectional communication from clients that integrate with the Phoenix.PubSub layer for soft-realtime functionality. For a conceptual overview, see the Channels guide. Topics & CallbacksEvery time you join a channel, you need to choose which particular topic you want to listen to. The topic is just an identifier, but by convention it is oft

Elixir does not provide loop constructs. Instead we leverage recursion and high-level functions for working with collections. This chapter will explore the former. Loops through recursionDue to immutability, loops in Elixir (as in any functional programming language) are written differently from imperative languages. For example, in an imperative language like C, one would write: for(i = 0; i < si

Now let's talk about associative data structures. Associative data structures are able to associate a key to a certain value. Different languages call these different names like dictionaries, hashes, associative arrays, etc. In Elixir, we have two main associative data structures: keyword lists and maps. Keyword listsKeyword lists are a data-structure used to pass options to functions. Let's see a

In this chapter, we will learn about the case, cond, and if control flow structures. casecase allows us to compare a value against many patterns until we find a matching one: iex> case {1, 2, 3} do ...> {4, 5, 6} -> ...> "This clause won't match" ...> {1, x, 3} -> ...> "This clause will match and bind x to 2 in this clause" ...> _ -> ...> "This clause would match any value" ...> end "This clause w

In this chapter, we will learn why the = operator in Elixir is called the match operator and how to use it to pattern match inside data structures. We will learn about the pin operator ^ used to access previously bound values. The match operatorWe have used the = operator a couple times to assign variables in Elixir: iex> x = 1 1 iex> x 1In Elixir, the = operator is actually called the match opera

Welcome! This guide will teach you about Elixir fundamentals - the language syntax, how to define modules, the common data structures in the language, and more. This chapter will focus on ensuring that Elixir is installed and that you can successfully run Elixir's Interactive Shell, called IEx. Let's get started. InstallationIf you haven't yet installed Elixir, visit our installation page. Once yo