In September, I wrote of my new project Cubes that “unfortunately, it wasn't an idea for either of my course projects this semester.” Since I have completely failed to find motivation for the course-related project I had planned to do, þreader (a thread-emphasizing feed reader; you can read the project introduction), I have decided to make the best ( Read more... )

On September 6, I had an idea which I couldn't not work on. (Unfortunately, it wasn't an idea for either of my course projects this semester.)

As you may know, in Minecraft, the individual cubical blocks are textured with unsmoothed 16×16 pixel textures. All blocks’ shapes (that aren't just cubes) have lengths in multiples of 1⁄16 block (example, ( Read more... )

For a project I'm considering, I took a few hours to see if I could write a working garbage collector.

This is a very bare-bones copying GC, written without any reference to How To Do It Properly (just my knowledge of how a copying GC works, but I believe it is mostly cleanly written other than (a) the hardcoded pointer comparisons for object ( Read more... )

I've written a new topic index page for my site: Games, simulations, and animations. Except for the note about Tile Game, everything on it is something I've already published.

Condensed list of the contents: Tile Game, Fire Worms, Mouse-maze, 15-puzzle, screen savers, Varychase, Linkage, Bouncyworm, Brownian Tree, pendulum animation.

( Read more... )

James@Waterpoint (Xplat on Freenode) mentioned an interesting problem: write an elegant point-free expression to compute the diagonal of a list of lists (that is, from [[00, 01, 02, ...], [10, 11, 12, ...], ...] obtain [00, 11, ...]).

His version:
diag = (map head) . (foldr (flip ((flip (:)) . (map tail))) [])

My version, which needs a non- ( Read more... )

I forget why I wrote this Haskell program, but it's cluttering up my do-something-with-this folder, so I’ll just publish it.

-- This program calculates all the ways to combine [1,2,3,4] using + - * / and ( Read more... )

$ cat ~/bin/maken
#!/bin/sh # Make files and view the results. make "$@" && open "$@"

UPDATE: Turns out I posted this previously, with further thoughts: Avoiding repeating myself (on the command line).

(If anyone has already used this title, that wasn't my intent.)


( Read more... )

I just wrote my first use of that thing that everyone's talking about. (If you don't know, this is part of the WHATWG/HTML5 general vicinity of features: an element which creates a bitmap pixmap image that can be drawn on by JavaScript.)

Since LJ doesn't let me embed JavaScript or iframes (a restriction which I'm only just noticing...) I'll have ( Read more... )