31 books like Elm in Action

Many functional programming books concentrate on the detail of functional techniques (things like recursion or higher-order functions), often leaving open the gap between these techniques and their concrete application to solve everyday programming tasks.

This was one of the reasons I wrote my book, and one source of inspiration for me was the work of F# evangelist Scott Wlashin.

For many years, Scott has been showing how he applies functional thinking in his daily practice centered around e-commerce, through blog posts on his popular site and his talks at programming conferences. At popular request, he's organized these ideas into his book Domain Modelling Made Functional.

The examples are practical enough that every business application programmer will be able to relate to them, and his explanation of functional programming techniques and ideas is clear and rigorous. Although Scott encourages the adoption of F# (the functional-first language of the .NET family), these… show more.

You may have got a taste of functional programming by learning some functional techniques in the language they use everyday, but if you want to deepen your knowledge, it's best to learn a functional language.

A multi-paradigm language like C# allows you to mix and match different techniques; a purely functional language, on the other hand, will force you to use the functional approach throughout—for example, by not allowing any state mutation at all.

The natural choice would be to learn Haskell, the functional language of reference and a lingua franca among functional programmers. Learning Haskell will allow you to take advantage of a wealth of literature on functional programming - books, blogs, talks, and so on - many of which have code samples in Haskell.

For this, I recommend you read Learn You a Haskell for Great Good by Miran Lipovaca. This book has been a favourite throughout the… show more.

For many years I did not question the validity of the language I was using, focussing instead on becoming good at getting it to do what was needed. It never occurred to me that, say, the type system could be flawed, causing extra work and allowing unnecessary bugs to seep in.

But what if, instead of writing validation code, you could define your types in a way that makes it impossible to create an invalid instance? What if you could define state transitions in such a way that a state machine cannot transition into an invalid state? These are indeed some of the things the Idris language allows.

In his book Type-Driven Development with Idris, Edwin Brady takes you through both the ideas of type-driven development, and how they're enabled in Iris. Iris looks a lot like Haskell, but better. It even has a unique solution for the complex issue… show more.

I think it's beyond dispute that concurrency is the most challenging area of programming.

Even fairly simple programs can become dauntingly complex once you introduce concurrency into the picture. For this reason, concurrency is definitely one area where even accomplished programmers should keep honing their skills.

Another difficulty is that there are different sorts of concurrency (parallelism, multi-threading, asynchrony), and different environments (in terms of latency, durability, etc) which all require different solutions.

Paul Butcher's Seven Concurrency Models in Seven Weeks helps you to make sense of this complexity by presenting different programming tasks along with the solution that most effectively tackles each task. It takes you from a demonstration of the use (and problems) of threads and locks - the most widespread, yet also the most low-level and error-prone approach to concurrent programming - to atoms - units that associate a constant identity with a mutable value - to… show more.

This is an essential resource for using Clojure to build real-world projects.

I love this book so much. It is a bit less “how-to” and a bit more “why in the world are we interested in programming and what does that mean for us as individuals and also for society at large?” That is to say, you can learn to code from this book—in JavaScript with p5.js, specifically—but Aesthetic Programming is not merely about learning to code; it’s also a provocative, critical exploration of code as a medium for thought, communication, and creative expression. When you code, you’re participating in the creation of “computational culture.” With this book by your side, you will be a more self-aware cultural citizen. (Also, this book is visually so, so beautiful. Just leafing through the pages inspires me.)

This book introduces developers to ClojureScript which is a dialect of Clojure that targets JavaScript runtimes.

It's a great choice for web developers who are considering building full-stack Clojure applications. The book will help developers learn about the differences between Clojure and ClojureScript, and to make effective use of both language dialects for building applications that span both the front-end and the backend.

For an overview book that focuses on intuition—a book that is intentionally designed to evade formality—to make my list, it has to be really, really good. This one is. I appreciate the inclusion of real code in multiple programming languages and the step-by-step traces of algorithms. I appreciate the care taken with the Big O material and the way that abstract data types are introduced. This is one of very few books whose recursion material I like—the ‘napkin’ approach to recursion is wonderfully done.  

During my first few weeks of JavaScript coding, I encountered what seemed to be an endless number of head-scratching moments: "I'm slowly reading the few lines of code I just wrote, it seems fine, so why isn't it doing what it looks like it should be doing?" Even more insidious at times than C++, JavaScript contains a number of fairly clever constructs, including things like hoisting, duck typing, and a loosey-goosey argument passing mechanism. This concise tome of fewer than 175 pages helped get me past those first few months, and as an author-stated goal, it helped me "learn to think in JavaScript."

If I were getting started with coding graphics today, I would start with this book, hands down. Learning p5 is the easiest way to create interactive graphics that run in a web browser, and this book is a very friendly, accessible, and beautifully illustrated introduction to coding graphics with p5.js—no prior experience needed. You might be wondering about the name “p5.js”. It’s a JavaScript library (that’s the “.js” part) based on Processing, the open-source programming language created for artists and designers. (More on Processing in a moment.) I have taught college courses with this book, and students love it. Plus, all the skills you learn here with p5 are applicable to JavaScript—the world’s most popular programming language—more generally.