Zelkova – Elm-style FRP for Clojure and ClojureScript

Zelkova – Elm-style FRP for Clojure and ClojureScript(github.com)

58 points by gaalze 11 years ago | 18 comments

gaalze 11 years ago |

There's also Javelin: https://github.com/tailrecursion/javelin

which à la 'Simpsons already did it' rule:

http://www.cliki.net/cells

sbensu 11 years ago |

It reminds me core.async's presentation, where Rich Hickey said something like "we thought Go's take on CSP was great, so we just added it to Clojure as a library". Blew my mind away, like Zelkova.

seanmcdirmid 11 years ago | |

FRP is a library in Haskell. Nothing to blow minds about.

blubbi2 11 years ago |

Sorry to be that guy, but are there any apps in production based on FRP/ Elm?

According to the Elm website, under "big projects" it lists the Elm website itself and a couple of rather PoC games. - http://elm-lang.org/Examples.elm

(I'm not saying that FRP is bad, I think it's an interesting concept, but I'm wondering on how efficient it is in production.)

jamesmacaulay 11 years ago | |

I think people are still figuring out the best ways of structuring large applications in Elm. See for example this discussion on routing from earlier this year:

https://groups.google.com/d/msg/elm-discuss/Hdpn3x0554c/3aFt...

Elm is still young but Evan is doing a great job of pushing the language forward.

If by "efficiency" you meant performance, then this is a good page to read:

http://elm-lang.org/blog/Blazing-Fast-Html.elm

seddona 11 years ago | |

We use Elm in production. See the symbol / footprint diagrams on this page https://circuithub.com/projects/electricimp/janice

grayrest 11 years ago | |

Not sure about Elm, but there are businesses using Microsoft's Reactive Extensions. I know Netflix had a series of blog posts on their use of RxJava and I believe they use RxJS as well.

[1] http://techblog.netflix.com/2013/02/rxjava-netflix-api.html

seanmcdirmid 11 years ago | | |

Rx isn't FRP.

a-saleh 11 years ago | |

Not sure about production use, but I know that Elm is bound to be used at Prezi, where Evan Czaplicky works, if I remember correctly.

gaalze 11 years ago |

Anyone got an opinion?

gaalze 11 years ago | |

I thought this was interesting:

~/src/elm-package$ cloc . => 2399

~/src/zelkova$ cloc . => 392

---

Also here are two demos:

#1. Mario!

http://jamesmacaulay.github.io/zelkova/examples/mario/

https://github.com/jamesmacaulay/zelkova/blob/gh-pages/examp...

#2. Dragging boxes

http://jamesmacaulay.github.io/zelkova/examples/drag-and-dro...

https://github.com/jamesmacaulay/zelkova/blob/gh-pages/examp...

sbensu 11 years ago | |

Are you the author? It looks amazing. I'm going to spend the weekend trying it out. Great Work!!!

gaalze 11 years ago | | |

I'm certainly not the author, I'm just desperate to see more people working on something to compete with Elm! I've just never been a fan of Haskell syntax :(

jamesmacaulay 11 years ago | | |

Hi, thanks and have fun :) Ping me on twitter (@jamesmacaulay) or create a GitHub issue if you run into trouble.