Elixir

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Elixir is a dynamic, functional language designed for building scalable and maintainable applications. Elixir leverages the Erlang VM, known for running low-latency, distributed and fault-tolerant systems, while also being successfully used in web development and the embedded software domain.
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Track mentors

50 Mentors

Our mentors are friendly, experienced Elixir developers who will help teach you new techniques and tricks.
Track students

13,577 Students

Join thousands of students who have enjoyed learning and improving their skills by taking this track.
Track exercises

92 Exercises

Hundreds of hours have gone into making these exercises fun, useful, and challenging to help you enjoy learning.

About Elixir

defmodule HelloWorld do

  @doc """
  Greets the user by name, or by saying
  "Hello, World!" if no name is given
  """
  def hello(name \\ "World") do
    "Hello, #{name}!"
  end
end

Elixir, initially released in 2012, extends upon the already robust features of Erlang while also being easier for beginners to access, read, test, and write.

José Valim, the creator of Elixir, explains here how he built the language for applications to be:

  1. Distributed
  2. Fault-Tolerant
  3. Soft-Real-Time
  4. Hot-Code-Swapped (can introduce new code without stopping the server)

Elixir actually compiles down to bytecode and then runs on the BEAM Erlang Virtual Machine.

There is no "conversion cost" for calling Erlang, meaning you can run Erlang code right next to Elixir code.

Being a functional language, everything in Elixir is an expression.

Elixir has "First Class Documentation" meaning comments can be attached to a function, making it easier to retrieve.

Regular expressions are also given first class treatment, removing awkward escaping within strings.

Elixir's asynchronous communication implementation allows the code to be lightweight, yet incorporate high-volume concurrency.

Programmers use Elixir to handle thousands of requests and responses concurrently on a single server node.

It has been used successfully for microservices that need to consume and serve a multitude of APIs rapidly.

The Phoenix framework helps structure Elixir applications for the web.

Join the Elixir track

Self-contained finite problems with which to learn the language

I have spent time with the Clojure, Elixir & Go tracks and all have been incredibly beneficial, providing self-contained finite problems with which to learn the language. The Go language track has been wonderful in introducing me to the language, what idiomatic code is, and the many different ways in which one can solve a problem.

Relaxed. Encouraging. Supportive.

Meet the Elixir Track mentors

Once you join the Elixir language track, you will receive support and feedback from our team of mentors. Here are the bios of a few of the mentors of this track.

Avatar of Chris Eyre

Chris Eyre https://devrantsblog.wordpress.com

I'm a long-time full-stack web developer in a range of languages. I mentor Elixir to allow me to teach and learn from the students.
Avatar of Aaron Milam

Aaron Milam GitHub

I have had an interest in functional programming for years, and Elixir has been my outlet for a while now. I love being able to program without hidden side effects, and I love the way functional programming changes the way you think about program flow.
Avatar of Olaoluwa Oluro

Olaoluwa Oluro https://github.com/ollaollu

I love Elixir because of it's explicitness and oh the pattern matching is amazing.
Avatar of Adrian Gruntkowski

Adrian Gruntkowski Homepage

Over 2 years ago, exercism was one of the first places where I actively learned about idiomatic approach to writing programs in Elixir. Now, after working with the language day to day, I'd like to give back to this great community.
Avatar of Emanuele DelBono

Emanuele DelBono https://github.com/emadb

I'm a developer passionate about clean code that fell in love with Elixir
Avatar of Yiming Chen

Yiming Chen https://github.com/dsdshcym

I love Elixir because I believe it can provide both dynamic polymorphism and referential transparency, which are both fundamental for writing clean code.
Fun. Challenging. Interesting

Community-sourced Elixir exercises

These are a few of the 92 exercises on the Elixir track. You can see all the exercises here.

Accumulate
easy
recursion
reduce
Strain
easy
collections
Scale Generator
medium
enumerations
string processing
Rotational Cipher
easy
string processing
Spiral Matrix
medium
lists
transforming
Dominoes
medium
algorithms
enumerations
recursion
sorting
trees
Passionate. Knowledgeable. Creative.

Meet the Elixir Track maintainers

The Elixir Maintainers are the brains behind the Elixir Track. They spend their spare time creating interesting and challenging exercises that we can all learn from. We are incredibly grateful for their hard work. Here are the bios of a few of the maintainers of this track.

Avatar of Devon Estes

Devon Estes

Freelance senior developer into @elixir-lang.

Get started with the Elixir track. As with everything on Exercism, it's 100% free!

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