Elm Lang

Updating nested records is not the same as in the Javascript world. This article guides you through the Elm approach. — Note: The “Keys to Elm” series describes a few basics of Elm that aren’t covered in the documentation or on the Internet much, just so you don’t spend time discovering them on your own. “Records” in Elm are similar to objects in Javascript. (The main difference is that objects can…

Here’s how to handle drag and drops and any other event! — For the most part, you will get by with the events that have already been built into Elm. But, if you program long enough in Elm — and, oh, why wouldn’t you want to — you will need to pen your own events. But, the documentation is thin on custom…

It’s easy for people to forget how hard they found something when they were beginners. The “Keys to Elm” series tries to teach a few things that will hopefully make learning Elm a bit easier. Note: This article assumes you have some familiarity with the Elm language. …

I’ve covered some basics of making HTTP calls from Elm in my previous article. These are also covered in the official guide, over here and here. This article pulls all this information together and goes into a little more depth. We’ll cover: What to expect with HTTP calls How to…

Overview There are two ways for your app to access Supabase — through their “API” and through their “API”. Let me explain: One: Supabase can be accessed through a traditional REST API. With these, you can use the equivalents of JavaScript’s “fetch” command. …

In this MEGA’s article, we’ll see some useful patterns to discover magic powers hidden inside Elm decoders. — Introduction: The gate to darkness Once upon a time, in the Pure Language realm, everything was simple, bright and predictable. That was until a despicable programmer fairy opened the gates to the realm of Impure Languages…

Decode the remote api responses into response types that have two parts: RequestStatus and response-specific type. This post share how I use pipelines and andThen to Decode a multi-object type. My payload from the remote service has the following form: { action: "UpdateCardRequest" errorCode: 0 message: "ok" successStatus: true …

Introduction The lambda calculus, sometimes described as the world’s smallest programming language, was devised by Alonzo Church in 1932–33 as new foundation for logic. A term (think “phrase”) in the lambda calculus is made up of just three grammatical entities: variables, abstractions, and applications. Variables are things like x, y, z…

On the errors of clinging on — Previously, I have written about adding a simple quad-tree to GPXmagic. This allowed some operations to work in time (roughly) proportional to the logarithm of the number of points. My fundamental structure remained a list of GPS track points. Why not, that’s the experience of riding your bike or walking…