Reducing degrees of freedom to make rules more dependable.

“A complex system that works is invariably found to have evolved from a simple system that worked.” — John Gall

“A model is a selectively simplified and consciously structured form of knowledge.” — Eric Evans

“You’re looking at it wrong.” — The Big Lebowski (1998)

“I see dead people.” — The Sixth Sense (1999)

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“You’re either in or you’re out.” — Ocean’s Eleven (2001)

When designing Funx I leveraged protocols, which meant some concessions.

“You’re not thinking fourth dimensionally!” — Doc Brown, Back to the Future Part II (1989)

Advanced Functional Programming with Elixir: Model Behavior, Manage Complexity, and Maximize Maintainability [Koski, Joseph, Tulton, Adaobi Obi] on Amazon.com. *FREE* shipping on qualifying offers. Ad...

“The problem is choice.” — Neo, The Matrix (1999)

“I didn’t say it would be easy. I just said it would be the truth.” —Morpheus, The Matrix (1999)

Tap tap tap-a-roo

Lifting (or perhaps stealing) some of Ash’s good ideas.

How Ash calculations work and ways to deal with missing or uncertain data.

“That’s just, like, your opinion, man.” —The Big Lebowski (1998)

Time for a closer look at actions.

How difficult is it to incorporate Ash into an existing codebase?

Exploring how Ash implements Ecto.

Where is the mess?

Authorization logic gets messy fast.

Not organization but coordination.

It’s all about the domain.

Explore the power of Ash Framework by modeling and building the domain for a real-world web application.

How do we handle side effects in a pure functional system?

“I’m not even sure what’s real anymore.” —The Matrix (1999)

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When are two things the same?

Use advanced functional programming principles, practical domain-driven design techniques, and production-ready Elixir code to build scalable, complex systems from simple, reusable components.

So many loops…

It feels a bit impolite to ask readers to download code and type mix commands just to run the examples. We have better tools now.

“They found me. I don’t know how, but they found me.” — Dr. Emmett Brown

Why not keep equality inside the module where it belongs?

Polymorphism has always relied on tags. Elixir’s structs make them safer.

This post walks through the basics of protocols in Elixir. It’s the information I wish I knew five years ago.

A blog about software development, data science, and other things I find interesting.

Use advanced functional programming principles, practical domain-driven design techniques, and production-ready Elixir code to build scalable, complex systems from simple, reusable components.