Show HN: Tetris Implemented in ClojureScript

[beders]

This is super condensed but still very readable if you know Reagent and Hiccup.

It's interesting to compare this to a lot of tetris clones written in TypeScript. There are a few that take enormous pleasure in defining a type hierarchy and what not.

Contrasting that to the very compact representation of tetrominos

    {:I {:color "#1197dd"
       :dim [4 1]
       :zero [1 0]
       0 [[-1 +0] [+0 +0] [+1 +0] [+2 +0]]
       1 [[+1 -1] [+1 +0] [+1 +1] [+1 +2]]
       2 [[-1 +1] [+0 +1] [+1 +1] [+2 +1]]
       3 [[+0 +1] [+0 +0] [+0 -1] [+0 +2]]}

and the very cute rotate function:

   (defn rotate [r] (-> r inc (mod 4)))

gives you a good idea what a Lisp is about.

[djblue]

Thanks! I really enjoyed the data modeling aspect of this project. I also ended up modeling the board as a mapping of [row, column] -> color which might be different from the traditional 2D array representation.

[Scarbutt]

Why pick Typescript instead of Javascript as a comparison? there's really not that much difference in your example if plain javascript objects/arrays/functions was used.

Clojure has better and more map handling functions in the std lib for sure, but I find that with the help of some libs you can write lots of Javascript in a Clojury way without too much hassle.

[lispm]

to create obfuscated and undocumented code? That's known already.

The goal actually is this: being able to write descriptive and understandable code for others and oneself.

Come back to the code a year later and is it still understandable? Lot's of cute character-level operators and fancy control flow is maybe not the way to go.

[hota_mazi]

I don't really see it. A similar approach in any imperative or functional language would read pretty much exactly the same.

Except that with static types, you'd gain a lot of clarity, efficiency, and future maintenance, one of the downfalls of Lisp.

[chrisoakman]

Nice work! :)

A few years ago some friends and I wrote a tetris clone to celebrate the 30th anniversary of tetris and learn ClojureScript in the process. Really fun group project.

Playable here: http://t3tr0s.com/

Repo: https://github.com/imalooney/t3tr0s

[djblue]

Your project is substantially superior to mine. It looks so goooooood!

[gunn]

Here's my tetris copy: http://wolandbros.com/tetris/

Both the game and the source are much more minimal, it's very easy to customise the rules. You can see the source here: https://github.com/gunn/tetris/blob/master/src/store.js

[djblue]

Sweet! Thanks for sharing. I see you're using pure-store to manage your game state. My implementation also uses a redux pattern for state management :)

[yogthos]

Here's a shorter cljs version [1], as a bonus it cross-compiles to the JVM and Js reusing the core logic.

[1] https://github.com/yogthos/clj-tetris/blob/master/src/tetris...

[rschachte]

This is sick! Link to source: https://github.com/djblue/tetris

[djblue]

Thanks!

[city41]

If interested in more ClojureScript games, I made Breakout: http://city41.github.io/reagent-breakout/

[soup10]

https://jstris.jezevec10.com/

[brabel]

The HTML page, which includes the JS scripts embedded, is only 75KB... not bad for a language so different from JS.

[a_t48]

Up being rotate rather than hard drop is tripping me up. I guess I could fork it, though. :)

[djblue]

https://github.com/djblue/tetris/blob/master/src/tetris/core... to update the mapping :)

[djblue]

I was following https://tetris.com/play-tetris, but I would be down to change it. It messes me up when I use the HJKL mapping.