| --- Log opened Fri Mar 26 00:00:46 2010 |
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| 02:20 | | * Vornicus decides to get around to trying pack and unpack. |
| 02:31 | <@Vornicus> | Considerably more straightforward -- and considerably more easily invertible -- than LZW itself |
| 02:36 | <@Vornicus> | ...need better knowledge of casting in Java. |
| 02:43 | < celticminstrel> | Huh? |
| 02:43 | <@Vornicus> | okay. sign extends. |
| 02:45 | <@Vornicus> | celmin: the unpacker needs to add bytes to a larger numeric, and I want to make sure that the bytes don't stomp on stuff elsewhere in the larger numeric. |
| 02:47 | <@Vornicus> | since the bytes might be negative... |
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| 02:52 | <@McMartin> | Vorn: This is a bitch in Java, one of the more obvious holes in the language |
| 02:52 | <@McMartin> | Basically, you have to go (int i, byte b)... |
| 02:52 | <@McMartin> | i += (b < 0 ? 256 + b : b) |
| 02:53 | <@Vornicus> | That doesn't look sensible. How about b & 0xff |
| 02:53 | <@McMartin> | = b. |
| 02:53 | <@Vornicus> | & upcasts first |
| 02:53 | <@McMartin> | Alternately, I think ((int)b) & 0xff will work. |
| 02:53 | <@Vornicus> | (as does everything except shifts.) |
| 02:54 | | * McMartin stabs glibc for obvious inferiority |
| 02:54 | <@Vornicus> | If an integer operator other than a shift operator ... is not an int, it is first widened to type int by numeric promotion. |
| 02:54 | <@McMartin> | It apparently thinks binutils 2.20.1 is not greater than 2.15 |
| 02:54 | <@Vornicus> | (quoth the spec) |
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| 03:34 | <@Vornicus> | This stuff just plain can't be simulated tricky-bits and all in Python. |
| 03:44 | < gnolam> | Hee. |
| 03:44 | | * gnolam 's favorite forum now features a spelling guardian. |
| 03:45 | < gnolam> | If your post doesn't pass the forum spell checker, you have to go through an additional confirmation step to actually post. |
| 03:48 | < gnolam> | (The same forum, among other things, turns "lol" into "I'm dumb!") |
| 03:55 | < Orthia> | That could be a problem. |
| 03:55 | < Orthia> | Mind, it depends on the subject matter. |
| 03:55 | < Orthia> | The ones I'm on have 'mispellings' constantly, because they're part of the terminology. |
| 03:58 | < gnolam> | Here, it's assumed that if you misspell, you're a moron. |
| 03:58 | < gnolam> | Or if you misspell on purpose, that you're a douche. |
| 03:59 | < gnolam> | Or, in those extremely few occasions when it's OK to intentionally misspell as an ironic comment, that you're clever enough to get around the filters. |
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| 08:54 | | You're now known as TheWatcher |
| 08:55 | | * TheWatcher readsup |
| 08:56 | <@TheWatcher> | "lol => I'm dumb!" would be even more amusing if it had a selection of replacements: "I'm dumb!", "I'm a complete idiot.", "I have trouble finding my arse with both hands!", etc... |
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| 09:17 | <@McMartin> | SomethingAwful has a bunch of those. |
| 09:18 | <@McMartin> | Including replacing, IIRC, "pwn" with ATTENTION: I AM AN IDIOT. |
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| 12:13 | < Namegduf> | Hmm, anyone know where cooperative multitasking was first developed? A source to read would be helpful, too. |
| 12:13 | | * Namegduf needs history. |
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| 15:39 | <@ToxicFrog> | Namegduf: at the program level, coroutines were invented by Conway in 63; see M.E. Conway, Design of a separable transition-diagram compiler, Communications of the ACM, Vol. 6, No. 7, July 1963 |
| 15:39 | <@ToxicFrog> | At the OS level, no idea. |
| 15:39 | < Namegduf> | Thanks. |
| 15:40 | <@ToxicFrog> | But I don't know that cooperative multitasking was used by pre-OSX Mac OS and by RISC OS. |
| 15:40 | <@ToxicFrog> | Er. Do know. |
| 15:44 | < gnolam> | http://www.youtube.com/watch?v=89OoXyuxTLM |
| 16:14 | < Alek> | oh wow. |
| 16:15 | < Alek> | is anyone else seeing only part of the web? |
| 16:15 | < Alek> | heck, google.com is unavailable, but new zealand is. :P |
| 16:15 | <@AnnoDomini> | I has Google. |
| 16:18 | < Alek> | weird. |
| 16:18 | < Alek> | could it be a DNS thing? |
| 16:18 | < Alek> | I mean, my ISP's? |
| 16:18 | < Alek> | or some other such problem? |
| 16:18 | < Alek> | hmm. I can't even access my ISP's sites. |
| 16:19 | < Alek> | no search engines. |
| 16:19 | < Alek> | but some other sites are fine. |
| 16:19 | < Alek> | oh wate google's back nao. |
| 16:21 | < Alek> | part of the web's coming back. |
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| 18:47 | <@McMartin> | Belated: Windows 3.1 also had cooperative multitasking |
| 18:49 | < jerith> | Cooperative multitasking is win, as long you control all the processes. |
| 18:49 | < Namegduf> | Heh. |
| 18:50 | < Namegduf> | And you feel like calculating the appropriate points to yield in each for a consistent time between yields. |
| 18:50 | < Namegduf> | Carefully and with consideration of all possible input. |
| 18:50 | < Namegduf> | It worked, though. |
| 18:50 | < jerith> | Just yield every time you're about to wait for I/O. |
| 18:50 | < jerith> | Python Twisted uses that model very successfully. |
| 18:51 | < Namegduf> | Not very good if you can go compute-bound, at all. |
| 18:51 | < Namegduf> | Which includes "a few seconds processing time here" |
| 18:51 | < jerith> | True, but you're paying for determinism. |
| 18:52 | < Namegduf> | You're definitely paying. |
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| --- Log closed Sat Mar 27 00:00:47 2010 |