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[toronto-lisp] March meeting minutes.
by Vishvajit Singh 11 Mar '10

11 Mar '10

Hi all, I put up what I can remember of the March meeting on our website: http://www.lisptoronto.org/past-meetings/2010-03-meeting (I also put up Abram's notes from February.) Here's that (tongue-in-cheek, but fairly informative) article I mentioned, "Git is MacGyver, Mercurial is James Bond": http://importantshock.wordpress.com/2008/08/07/git-vs-mercurial/ In fact, I've been thinking about MacGyver'ing Git a little.. I'd like a tool that can verify a Git repository, by which I mean go through all the objects in the repo and make sure they still match their SHA1 hashes. That way, if a cosmic ray somehow flips a bit on my hard drive, I can just restore the corrupted object from a backup. It seems like a simple thing, which is why I figure there must be some way to do this already with the tools Git supplies. I found 'git-verify-pack' but that doesn't seem to be quite what I want. Any ideas? If I don't find anything it should be pretty simple to MacGyver a solution, since the filesystem layout of a Git repository makes it pretty easy to iterate through all the objects. - vish

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[toronto-lisp] Google AI Challenge winner analyzes his program
by Vishvajit Singh 05 Mar '10

05 Mar '10

At Tuesday's meeting, Abram described his work on the Google AI challenge. Here, the winner of the challenge explains his program in some detail: http://a1k0n.net/blah/archives/2010/03/index.html I remember reading about the Netflix prize, in which winners tended to apply several different algorithms to the problem, selecting between them in different situations, rather than optimizing the hell out of one fundamental algorithm. Seems similar to this case. - vish

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[toronto-lisp] JavaScript Schemes
by Mark Bolusmjak 03 Mar '10

03 Mar '10

Mine: http://github.com/z5h/zb-lisp Another, much more complete Scheme in JavaScript: http://www.biwascheme.org/ Friend's Server Management tool in PLT Scheme: http://github.com/babyman/silk Cheers. -mark

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[toronto-lisp] Doug, re. book
by Paul Tarvydas 02 Mar '10

02 Mar '10

Doug, If you will be attending and can bring a copy of your book, I will buy it from you. Let me know the final price so I can bring exact change. thanks pt

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[toronto-lisp] Next meeting Tuesday Mar 2nd
by Abram Hindle 26 Feb '10

26 Feb '10

So we'll meet in March on Tuesday the 2nd. Does anyone want to present anything? * A project you're working on * A problem you have * A solution you've found * A CL feature I can talk briefly about an a tron-ai bot I made for the UW CSC Club competition (it was buggy and I didn't have time to do more about it). abram

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[toronto-lisp] Anyone coming from Waterloo?
by Nikita Sidorov 17 Feb '10

17 Feb '10

Hi, everyone! I enjoyed the meeting in November and would love to join again. But since then I moved to Waterloo and what is more I do not have a car. So, I decided to ask everyone here - is there by any chance anyone coming to meetings from Waterloo and who wouldn't mind company of a lisp admirer? Thanks, Nikita

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[toronto-lisp] AI Tron Competition with support for CLOJURE :D
by Abram Hindle 10 Feb '10

10 Feb '10

http://csclub.uwaterloo.ca/contest/starter_packages.php They provide some support for using Clojure. Basically you program a tron AI. abram

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[toronto-lisp] February Lisp Meet notes
by Abram Hindle 03 Feb '10

03 Feb '10

- Paul brought an old 68000 common lisp print out - Paul talks about lisp works SMP multiprocessing stuff - new threading and sync primitives and interface - parallelism strategies - Hoare Monitors - Dining Philosopher's problem - Exam Dining Philosopher's code - Discuss context switching - doug mentions Lock-free append - spin locks - data type sizes - where 32bit is smaller and faster - where to put - tag in low bits to do math without shift - sbcl & threads - CL def not threadsafe - GCL has plet - Doug says single process-safe is dangerous - CSP http://en.wikipedia.org/wiki/Communicating_sequential_processes - erlang - copy semantics - persistence allowed - stdlib - framework - clojure - - more message passing - socket management - input buffer - output buffer - syscall ammortization - send more messages - pass unix domain sockets - free-lists and warm cache - Djkstra - 1965 dining philosophers problem - JVM - ABCL - CORBA rant -

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[toronto-lisp] Meeting on the 2nd!
by Abram Hindle 01 Feb '10

01 Feb '10

Feb 2nd! LinuxCaffe at 6:00pm. So lets organize and get a few topics on the agenda. abram

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[toronto-lisp] multi-core CL STM
by Paul Tarvydas 22 Jan '10

22 Jan '10

If anyone is not a member of the LispWork lisp-hug mailing list and is interested in multi-core STM, check out Dave McClain's thread entitled "STM": http://www.lispworks.com/support/lisp-hug.html As someone pointed out, the complete multi-core CL implementation of STM fits in one email... pt [may include hoyteisms].

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