Is Elixir the Future? feat. José Valim | S2 E01 · Backend Banter summary

Key takeaways

Elixir is gaining popularity as a functional programming language, known for its robustness and scalability.
Immutability in Elixir significantly enhances maintenance ease, concurrency, and fault-tolerance.
Elixir's design allows seamless communication in distributed systems, making it easier to build robust applications.
The decision to not include a static type system in Elixir is deliberate, emphasizing a pragmatic approach to functional programming.
Resources like Livebook and 'Elixir in Action' are excellent starting points for those interested in learning Elixir.

Summary

Introduction to José Valim and Elixir

In this episode, the host welcomes José Valim, the creator of the Elixir programming language, and discusses the growing popularity of Elixir within the programming community. They dive into the unique features of Elixir and compare it to languages like JavaScript and Python, explaining its status as one of the most admired functional programming languages in the industry. José expresses his surprise at its prominence, highlighting the metrics of GitHub statistics where Elixir often ranks highly.

Languages and Personal Experiences

A light-hearted conversation ensues about the hosts' struggles with foreign languages, leading to an exploration of José's academic background and his language challenges. Their discussion shifts to Elixir’s features, particularly its functional programming principles and the decision to not implement a static type system as a core aspect of its design, countering the typical expectations of functional languages.

Concurrency and Fault Tolerance

José explains how Elixir's design allows for better handling of concurrency compared to languages like Ruby and Python. The podcast discusses the benefits of immutability, stating that without shared state, Elixir makes it easier to deal with errors, creating a more robust programming environment that emphasizes fault tolerance.

Distributed Systems in Elixir

The conversation highlights Elixir's unique capability to manage distributed systems seamlessly. Unlike other programming languages, Elixir uses its built-in features to handle processes and communication between nodes across machines without the need for external messaging systems. This architectural decision simplifies development and enhances the robustness of applications developed in Elixir, making it an attractive choice for distributed architectures.

Runtime and Design Decisions

José elaborates on how the design choices in Erlang, upon which Elixir is built, shaped the way both handle issues such as state and error management. He gives insight into the actor model, preemptive processes, and how those aspects contribute to the overall fault tolerance and observability of Elixir applications.

Practical Takeaways and Resources

Finally, José shares practical insights for developers looking to learn Elixir, pointing them towards various resources including the Livebook for interactive learning experiences and the Elixir in Action book for in-depth understanding. He encourages newcomers to experiment with Elixir while emphasizing the importance of immutability and pure functions within the context of functional programming.

Show notes

We're back for Backend Banter Season 2, and we bring a very special guest, José Valim, the creator of the Elixir Programming Language, one of the most popular and loved functional programming languages of today. (Fun fact: it's used in production at Discord).

We cover the nitty-gritty of the language, ranging from simple topics such as the decision behind not making Elixir be statically typed, into the more complex cross-machine communication. We go over how Elixir's features compare with those of other languages, work habits of today's developers, José's own day-to-day development, and a lot more!

Today's talk encompasses a great variety of themes, so grab your coffee and tune in!

Learn back-end development - https://www.boot.dev

Listen on your favorite podcast player: https://www.backendbanter.fm

Livebook & Elixir Talk: https://www.youtube.com/watch?v=pas9WdWIBHs

Elixir Programming Language: https://elixir-lang.org/

Livebook: https://livebook.dev/

Elixir In Action Book: https://www.manning.com/books/elixir-in-action-third-edition

José's Socials:

X/Twitter: https://x.com/josevalim

LinkedIn: https://www.linkedin.com/in/josevalim

GitHub: https://github.com/josevalim

Timestamps:

00:00 - Intro

01:06 - Embarrassing Stories with Foreign Languages

02:58 - Who is José Valim? (and Elixir's Popularity)

06:51 - Does José Use Phoenix a Lot?

08:28 - Why Isn't Elixir Statically Typed?

16:51 - External Input vs. Internal Code Logic

28:16 - Quick Overview of BEAM languages

31:23 - Elixir’s Equivalent to Golang’s Goroutines & Channels

42:43 - Cross-Machine Communication in Standard Libraries

49:15 - Do You Need RabbitMQ When Writing Elixir?

54:53 - Built-In Features in the Standard Library

01:01:52 - Why People Are Too Used To Work The Hard Way

01:04:22 - José and DHH

01:08:01 - Favorite Elixir Features & Immutability

01:17:49 - Purity in Functional Programming

01:21:35 - Where to find José

Is Elixir the Future? feat. José Valim | S2 E01