magnars

4 lata temudiscuss

Want to watch two developers live code a small game with Clojure and ClojureScript? What does functional programming look like when wielded in anger? Will the tests be green or red or both?

Seven years ago I made a screencast where I coded a game in Clojure so very quickly. This time I'm joined by a friend to do something hopefully a bit more entertaining, useful and informative. The first two episodes are out. More to come every Friday. :)

magnars

13 lat temudiscuss

It didn't feel right naming it `optimus.core` :)

magnars

14 lat temudiscuss

That's defined in my slime.el (2010.04.04), which is why I require that first.

magnars

14 lat temudiscuss

I see that you're actually creating your own slime-js-minor-mode-map. I'm guessing that was necessary because you didn't require slime-js before requiring setup-slime-js.

Maybe it will resolve your issue of you put this at the top of the file?

     (require 'slime)
     (require 'slime-js)

The swank-js documentation says it depends on js2-mode too. Are you using that? At least I have no issues with entering arrays in the repl.

magnars

14 lat temudiscuss

That last link there is all there is of the "game" for now. :-)

magnars

14 lat temudiscuss

From what I can understand, it doesn't. Backwards compatability is usually good. However, there was a breaking change in 2011 sometime. The slime-js in marmalade relies on the SLIME in marmalade, which is from 2010.04.04 - and works with that. Same for clojure-swank. So by removing the newest SLIME, it worked for me.

magnars

14 lat temudiscuss

Yeah, that would be pretty cool. I'll be making something along those lines to aid me while I'm making that bouncy ball into an actual game. I wouldn't know how to start making it general purpose, but as a wrapper around canvas and requestAnimationFrame it is definitely doable.

magnars

14 lat temudiscuss

Ooh, very nice. I'll fix that straight away. Thanks!

magnars

14 lat temudiscuss

I wrote a little bit about installing swank-js a couple of posts up. You can also check out all my emacs-settings on github https://github.com/magnars/.emacs.d/blob/master/setup-slime-...

The only thing missing there is the packages installed through package.el, which would be slime-js in this case.

And here's the code for the bouncing ball: https://github.com/magnars/blockout

magnars

14 lat temudiscuss

The biggest problem for me was conflicting versions of SLIME.

Installing swank-js is a breeze with npm, but the installation instructions tell you to get the newest version of SLIME from their svn. That didn't work so well, since my clojure-swank already relied on an older version.

Simply installing slime-js from marmalade instead made all the difference.

As for my settings, they are public on github. https://github.com/magnars/.emacs.d/blob/master/setup-slime-...

magnars

14 lat temudiscuss

So I guess the "Use for good, not evil" clause will finally be removed from jsmin and jslint now.

Submissions

Parens of the Dead: A live coding screencast with Clojure and ClojureScript

Stasis - Not another static site framework for Clojure

Programming like a Pirate (Alt+Shift+M)

An experiment in multiple cursors for Emacs (4 min screencast)

4 min Emacs screencast inspired by Bret Victor's Inventing on Principle

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