ReactFX
Elm
ReactFX | Elm | |
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3 | 198 | |
370 | 7,451 | |
- | 0.2% | |
10.0 | 5.4 | |
over 5 years ago | about 2 months ago | |
Java | Haskell | |
BSD 2-clause "Simplified" License | BSD 3-clause "New" or "Revised" License |
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ReactFX
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React is a fractal of bad design
You could also write that in many other languages like Clojure (with cljfx for FP fans), Python, Ruby, JavaScript, and of course Java. It would be less verbose if I used a library that better used Kotlin's features, but the goal here is that you can look up the JavaFX APIs from the link above (there are a couple of implied static imports).
So not much different, but it demonstrates how the text property of the label is bound to a dynamically computed string which is in turn bound to an observable number. When the timer fires, the count increases and the label is recomputed. Everything is done that way so layout computations, for example, won't run unless the size of the label changes. And that's it - no need for VDOMs or prop drilling or state memoization or any of these other performance hacks.
At some point you'll observe that this seems a like like "reactive programming" as used on the server side, and then might want to explore a library like ReactFX which connects these two worlds together.
https://github.com/TomasMikula/ReactFX
There are some other nice features in this type of toolkit that the web community seems to be heading towards. I'd be willing to bet a lot that at some point they'll even reinvent inheritance under a new name, because being able to write code that's generic over component trees is really pretty useful. The hooks/functions model totally wrecks that and has led to this explosion of "design systems" (otherwise known as themes), none of which interoperate properly or can be coded against in an abstracted manner.
None of this is to say that FX is perfect or that React/SolidJS etc are the wrong tools to use. You can run FX apps in a browser using a form of server side rendering - check out https://www.jpro.one to see a fully crawlable website that's actually implemented using JavaFX on the server with no frontend/backend split existing at all. But it only works well if you don't have a fast and reliable server connection, plus a server with plenty of RAM and CPU. Alas browsers pull all sorts of mean tricks to keep people locked inside the HTML5 sandbox so JS frameworks aren't going anywhere, but it would be nice if that community spread its wings a bit and looked at prior art from outside their language. GUIs are old and the challenges involved in them aren't new, and from the outside it looks suspiciously like there is no real progress being made here, only wheel spinning.
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RichTextFX: Open source libraries for making a text viewer / editor
ReactFX - For cleaner, easier-to-reason event handler composition. Nice!
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What is this design pattern called is prevalent throughout guava and apache commons?
I've noticed when you look into a lot of classes in some libraries like guava, apache commons, or ReactFX, you'll notice a sort of abstraction pattern. There'll be a class that houses a bunch of common methods. Inside of those methods, instead of putting the relevant logic inside of the method, they'll call an operation-specific class that executes the logic. An example would be PredicateUtils or EventStream. Is there name for this pattern? It doesn't quite seem like it fits the command or service layer patterns.
Elm
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Ludic: New framework for Python with seamless Htmx support
Elm [1] is based on a similar idea. Build your app from pure functions that return HTML tags.
[1] https://elm-lang.org/
- Learning Elm by porting a medium-sized web front end from React (2019)
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Can you make your own JavaScript by implementing ECMAScript standard?
You also wouldn't really be creating your own new programing language. You would be creating something that can run JavaScript by following JavaScript standards and syntax. You might be able to add some non-standard features of your own on top of those standards, or include your own standard library of helpers or utilities, but you can't completely make a new or alternative language and then load it in the browser (or at least not by reimplementing ECMAScript standards... you actually can make your own language that runs within any Javascript enviroment, if you provide an interpreter or compiler that transforms it into valid JS. Some people have done something like this, eg Elm: https://elm-lang.org/).
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What is the best way to present the user the results of Haskell computations?
You should at least have a look at https://elm-lang.org/ it is a pure functional language like Haskell (although with fewer fancy syntax/type classes) but it has some lovely libraries for visualisation and even with plain elm (+ elm-ui) doing string transformations can be easily done.
- Course using F#: Write your own tiny programming system(s)
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Building React Components Using Unions in TypeScript
I get it. However, the whole point of using Unions to narrow your types, ensure only a set of possible scenarios can occur, and only access data of a particular union when it’s safe to do so. That’s some of what pattern matching can provide, and 100% of what using switch statements in TypeScript with their Discriminated Unions can provide. Yes, it’s not 100% exhaustive, but TypeScript is not soundly typed, and even Elm which is still has the same issue TypeScript does: You’re running in JavaScript where anything is possible. So it’s good enough to build with and much better than what you had.
- What's the state of the Elm repo? · Issue #2308 · elm/compiler
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How to render a basic calendar UI in Elm
The beauty of a language like Elm (and other lambda-calculus / functional programming inspired languages) is that there's very little transformation involved in going from an idea to code. And that seems to have a big impact on getting things done.
- Como desenvolvi um backend web em Clojure
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Is it possible to write games like Pac-Man in a functional language?
I think the most fun and approachable way for beginners to build games with functional programming is with Elm [1].
See a few (small, demo) games built by the community in [2] .
Notice Elm has abandoned the FRP approach in favor of Model-View-Update [3].
[1] https://elm-lang.org/
What are some alternatives?
RichTextFX - Rich-text area for JavaFX
rescript-compiler - The compiler for ReScript.
Flowless - Efficient VirtualFlow for JavaFX
haskelm - Haskell to Elm translation using Template Haskell. Contains both a library and executable.
commons-collections - Apache Commons Collections
purescript - A strongly-typed language that compiles to JavaScript
yew - Rust / Wasm framework for creating reliable and efficient web applications
idris - A Dependently Typed Functional Programming Language
reflex - Interactive programs without callbacks or side-effects. Functional Reactive Programming (FRP) uses composable events and time-varying values to describe interactive systems as pure functions. Just like other pure functional code, functional reactive code is easier to get right on the first try, maintain, and reuse.
haskell-names - Haskell suite library for name resolution
language-thrift - Haskell parser for the Thrift IDL format.
Vue.js - This is the repo for Vue 2. For Vue 3, go to https://github.com/vuejs/core