ben's tech page

ben / tech

• snaprotate - deletes old rsync-based snapshots, configured using a small combinator language embedded in Haskell (2010-05-07)
• lsdupes - a unix command to find files with identical content. Version 1.2 released today (2010-04-28)
• Swift vs OPM technical notes: on hierarchical processes (PDF) and on collections (PDF) (2010-04-28)
• JiniGrid - a taskfarm service for Jini - a project I worked on as a student at EPCC in 2000 (2010-03-03)
• stupid - a metalanguage for cryptography (I'm a contributor to this) (2010-03-03)
• I started a new blog related to my technical hobbies (2010-02-27)
• PCs to clusters to grids - a one-hour talk on programming applications for clusters and grids using a loosely coupled file based approach, which I gave at the University of Johannesburg in April 2009 as part of a research cluster training workshop. (also available in OpenOffice format) (2010-02-22)
• A SwiftScript presentation for the Software Technology Colloquium at uu.nl (2010-02-16)
• globe applet - A rotating globe which I wrote to display my world travels.
• 26c3-ddc - a domain specific language for controlling the blinkenlights at the 26th Chaos Communications Congress. (2010-01-14)
• git/cogito/stg bash tab completion (deprecated in favour of code in main git release)
• Some source code management / git notes.
• I'm trying to get hgm - a maildir porcelain for git - into a releasable/usable state.
• Notes about Voice-over-IP and SIP.
• decode-pdu - SMS PDU decoder for Sony Ericsson phones (2010-01-18)
• swiftlike-dsl - some notes on how the SwiftScript language of Swift might be implemented as a Domain Specific Language (DSL) inside Haskell.
• Roman numerals in Java and Haskell (2010-01-18)
• Notes on various maildir conventions (2010-02-04)
• Quine.java - a quine (a program which outputs its own source code).
• Pie-in-the-sky ideas with no implementation
• Javadocs for old java stuff
• my extra-long bash prompt (2010-02-24)
• unix load averages - mostly I wrote this for playing with MathML, which alas still seems to not be implemented very well
• One Instruction Set Computers
• PC fan reversal
• antispam notes
• Building an http-backed $jpuppy for users of WaterfallGlen - not really of interest if you aren't on WaterfallGlen...

Some of the code that I work on is browsable in gitweb.

bash_completion patches

• find-fstype-osx-2 -- Tab-completion on find fstype on Mac OS X (updated from -1 which was buggy)

msnlib patches

a few patches I use on top of msnlib 3.5:

• allow-offline-sending-1 -- allows sending of messages even to people who appear to be offline - this was causing me trouble when attempting to communicate with some people (maybe remote client trouble?)

other patches

• pine-benc-index-timeago-1 -- adds a TIMEAGO field to pine, giving time since message was sent (for example, 3m for 3 minutes, 2d for two days.

Shepard tones: See this wikipedia entry. There's java code to generate sox raw data format: Shepard.java and an mp3 of the output: shepard_tone.wav.mp3 (3 Mb).
Use like this:

 java Shepard < a.dat && sox a.dat && sox a.dat a.wav

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