| --- Log opened Tue Jan 18 00:00:09 2011 |
| --- Day changed Tue Jan 18 2011 |
| 00:00 | | You're now known as TheWatcher[zZzZ] |
| 00:25 | | ComradeBear [ZLOK@3A600C.A966FF.5BF32D.8E7ABA] has joined #code |
| 00:40 | < Alek> | "Our accountants pass around legends of a key combo that switches NumPad to roman numerals." |
| 00:41 | < gnolam> | Heh. From where? |
| 00:43 | < Alek> | bash.org.ru |
| 01:03 | | Attilla [Some.Dude@Nightstar-735cedc6.threembb.co.uk] has quit [Ping timeout: 121 seconds] |
| 01:08 | | Vornicus-Latens is now known as Vornicus |
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| 05:08 | | mode/#code [+o Vornicus] by Reiver |
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| 06:35 | | Derakon is now known as Derakon[AFK] |
| 07:11 | | You're now known as TheWatcher |
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| 11:08 | | Kindamoody|out is now known as Kindamoody |
| 12:33 | | cpux is now known as shade_of_cpux |
| 12:37 | < ComradeBear> | Anybody around? |
| 12:38 | < ComradeBear> | Nevermind, it'll be an hour. |
| 12:38 | < ComradeBear> | I'll be back! |
| 12:52 | | AnnoDomini [annodomini@F67919.F326B3.98D923.BDA7B6] has quit [[NS] Quit: GO INTO DEBT.] |
| 12:54 | | gnolam [lenin@Nightstar-38637aa0.priv.bahnhof.se] has joined #code |
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| 13:26 | | mode/#code [+o AnnoDomini] by Reiver |
| 13:29 | | You're now known as TheWatcher |
| 14:12 | < Phox> | You know, it's been an hour, and he never returned. |
| 15:25 | < froztbyte> | Yo mamma so fat, she sat on a binary tree and flattened it into a linked list in O(1) time. |
| 15:26 | <@jerith> | Dammit! I wanted to paste that here after you put it in Other Places. |
| 15:26 | < froztbyte> | :D |
| 15:37 | < EvilDarkLord> | Wait. Even if the momma is that fat, wouldn't she need sqrt(log(n)) time to fall through the tree? |
| 15:39 | < Rhamphoryncus> | <kerio> and of course chuck norris' programs all run in O(1/n) |
| 15:56 | | * AnnoDomini suspects Rhamphoryncus visits Freenode. |
| 15:56 | | * Rhamphoryncus suspects so as well |
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| 18:01 | | AnnoDomini is now known as Lykkennan |
| 18:01 | | Attilla is now known as Prophet |
| 18:16 | | EvilDarkLord is now known as Maze |
| 18:21 | <@ToxicFrog> | I've only been doing it for ten minutes and I already know I don't like marking assignments. |
| 19:00 | | SmithKurosaki [smith@Nightstar-bd012c7e.dsl.teksavvy.com] has quit [Operation timed out] |
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| 19:11 | <@ToxicFrog> | Oh god |
| 19:12 | <@ToxicFrog> | There's a depressing number of people who interpreted the first question very, very wrong. |
| 19:12 | <@ToxicFrog> | It asks for two switching circuits, one implementing (A+B+C) and one implementing (AB)+(AC)+(BC). |
| 19:13 | <@ToxicFrog> | At least two people created logic circuits, and a bunch of others created one circuit that implements one (or in some cases neither) of those functions. |
| 19:18 | | SmithKurosaki [smith@Nightstar-bd012c7e.dsl.teksavvy.com] has joined #code |
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| 19:42 | | AbuDhabi is now known as Lykkennan_ |
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| 20:18 | | celmin [celticminst@1AB00B.855209.A256BB.43A6F1] has joined #code |
| 20:19 | < celmin> | Question, if any Python people are around... is there a security risk inherent in the map() command? |
| 20:24 | | celmin [celticminst@1AB00B.855209.A256BB.43A6F1] has quit [Ping timeout: 121 seconds] |
| 20:31 | | celmin [celticminstre@1AB00B.855209.A256BB.457AC8] has joined #code |
| 20:35 | | celmin [celticminstre@1AB00B.855209.A256BB.457AC8] has quit [Ping timeout: 121 seconds] |
| 20:36 | < ComradeBear> | 151220 | <Phox> You know, it's been an hour, and he never returned. <- That is true, that's because the issue didn't return within the hour. |
| 20:36 | < ComradeBear> | I was going to ask for help bugtesting a site, but the admin I'm helping decided he'd rather eat chips. |
| 20:36 | < ComradeBear> | (Or something.) |
| 20:37 | <@jerith> | Eating chips is more fun than debugging. |
| 20:37 | < ComradeBear> | Heh. :D |
| 20:37 | | * jerith sometimes eats chips /while/ he debugs. |
| 20:37 | < ComradeBear> | In my defense, I never actually left. So I couldn't return. |
| 20:38 | < ComradeBear> | Anyways, it turned out I didn't need any help being an idiot. |
| 20:38 | <@jerith> | You can do that all on your own? |
| 20:38 | < ComradeBear> | So it would seem. |
| 20:38 | < ComradeBear> | I should become a professional idiot. |
| 20:39 | <@jerith> | Is there much money in it? |
| 20:40 | < ComradeBear> | Doubt it. |
| 20:40 | < ComradeBear> | Right now I'm performing for a flask of campaigne I'm not going to drink. |
| 20:43 | <@jerith> | Is it the prize or the audience? |
| 20:45 | < ComradeBear> | The prize. |
| 21:05 | | Vornicus-Latens is now known as Vornicus |
| 21:13 | | Maze is now known as EvilDarkLord |
| 21:19 | <@Vornicus> | celmin: map()? Like, throwing a list through a function? Not unless you distrust an arbitrary function, which means you wouldn't be able to trust, well, /anything/ |
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| 22:27 | < simon_> | is f(f(x)) = x a consequence of reflexivity, or what is it called? |
| 22:29 | <@Vornicus> | That is called "self inverse" |
| 22:30 | < simon_> | oh ok. |
| 22:30 | <@Vornicus> | f(x(x)) = f(x) is idempotence. |
| 22:31 | < simon_> | f(x(x)) = f(x) implies that x is a function? |
| 22:32 | < simon_> | oh, you mean f(f(x)). I get it. |
| 22:33 | <@Vornicus> | er, right, typos |
| 22:33 | < simon_> | hmmm |
| 22:34 | < simon_> | so a a unary function can be idempotent in itself for a set of things, and a non-unary function can be (left/right) idempotent given a subset of idempotent elements of a set of things. |
| 22:35 | < simon_> | s/non-unary/binary/ I don't really now about tertiary operators, I don't suppose they're that common. |
| 22:36 | <@Vornicus> | well, a function's parameters can be made a single object via a tuple. |
| 22:38 | < simon_> | yes, I was thinking mathematically. |
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| 23:27 | | mode/#code [+o Derakon] by Reiver |
| 23:27 | <@Derakon> | I have an SSH connection that has a process running in the background that's spitting out status information to stdout (despite my attempt to capture it with "2>&1 > log.txt"). |
| 23:28 | <@Derakon> | If I log out and then log back in in a different session, the process will continue running; is there any way to get back access to that status information? |
| 23:33 | <@Vornicus> | screen, is the usual tool. |
| 23:34 | <@Derakon> | Given that I haven't started this in screen? |
| 23:34 | <@ToxicFrog> | How will it continue running? |
| 23:34 | <@ToxicFrog> | Generally you aren't allowed to log out when you have backgrounded jobs, and if you force it they'll SIGPIPE. |
| 23:35 | <@Derakon> | ... |
| 23:35 | <@ToxicFrog> | Also, the reason your capture didn't work is that you got the order wrong: >log.txt 2>&1 |
| 23:35 | <@Derakon> | I wasn't prevented from logging out last week when I tried this. |
| 23:35 | <@Derakon> | And when I logged back in this morning I could see that the CPU was pegged. |
| 23:35 | <@ToxicFrog> | Huh. How did you background it? |
| 23:36 | <@Derakon> | Um...can't remember if that was ctrl-Z + bg or just '&' at the end of the invocation. |
| 23:36 | <@Derakon> | The ones I have right now are &. |
| 23:36 | <@Derakon> | Should've just used the job queue and had done with it...dammit. |
| 23:36 | <@ToxicFrog> | Huh. That totally works. |
| 23:36 | <@ToxicFrog> | I guess it only complains if the jobs are suspended. |
| 23:37 | <@Derakon> | That makes a modicum of sense. |
| 23:37 | <@Derakon> | It'd be all too easy to leave suspended jobs forgotten until the end of time otherwise. |
| 23:37 | <@ToxicFrog> | Yeah. |
| 23:38 | <@Derakon> | You had me worried there that the reason those jobs hadn't terminated was because they had hung, instead of because they're ridiculously CPU-intensive. |
| 23:39 | <@Derakon> | (Running data processing on 750 megapixels' worth of data) |
| 23:41 | < froztbyte> | Derakon: untested solution that I thought of the other day |
| 23:41 | < froztbyte> | (to your process question) |
| 23:41 | < froztbyte> | is to suspend it on the one side with cryopid, then resume it from within a screen |
| 23:41 | < froztbyte> | you're welcome to test it out and see if it actually does anything useful ;) |
| 23:42 | <@Derakon> | Okay, from what I can read of cryopid it involves copying program state so you can transfer it across sessions? |
| 23:42 | <@Derakon> | That would probably not work very well here... |
| 23:42 | < froztbyte> | yeah, memory dump to file, or somesuch |
| 23:42 | <@Derakon> | See also: 750 megapixels' worth of data. |
| 23:43 | <@Derakon> | (And multiple copies of that data in memory, from what a coworker has said) |
| 23:43 | < froztbyte> | so the usual endian and arch concerns alongside memory constraints and all that shit |
| 23:43 | < froztbyte> | Derakon: yeah, I guess you're possibly screwed for right now :) |
| 23:44 | <@Derakon> | Oh well... |
| 23:44 | <@ToxicFrog> | Derakon: you might be able to do something with /proc/<pid>/fd/* |
| 23:44 | < froztbyte> | meh..time for me to lock up fort knox again and go get some sleep, I guess |
| 23:44 | <@Derakon> | I still have a couple of days to get this processed, and it's on the second-most-intensive step now having started this morning. |
| 23:44 | <@Derakon> | Night, Frozt. |
| 23:44 | < froztbyte> | \o all |
| 23:44 | <@ToxicFrog> | In particular, fd/1 and fd/2 will be stdout and stderr, and catting them sometimes works (at the cost of interfering the program's "normal" output, but right now that's not connected to anything) |
| 23:45 | <@Derakon> | (Boss can't understand why this is taking so long. I keep telling him that we're using -iter=5 instead of -iter=4 and that runtime depends exponentially on that value, he keeps ignoring me) |
| 23:45 | <@ToxicFrog> | Failing that, I've got no ideas other than "run it in screen next time" |
| 23:46 | <@Derakon> | The problem I have with screen is that it mucks with vim...or at least, that's what I remember from last time I tried it. |
| 23:46 | <@Derakon> | So I don't use it by default, and I don't think to fire it up for long-running stuff. |
| 23:47 | <@ToxicFrog> | There's probably some option you can pass in that will fix that |
| 23:47 | < Namegduf> | I've never had it muck with vim, so it's probably a configuration-specific thing you can fix. |
| 23:47 | <@ToxicFrog> | Failing that...yeah, use it for long-running programs and run vim normally. |
| 23:47 | | * Namegduf uses vim for a lot |
| 23:48 | <@Derakon> | It's my text editor of choice, and I don't generally use an IDE. |
| 23:49 | <@ToxicFrog> | Derakon: incidentally, expanding on the output redirection - x>y is basically "fd[x] = open(y)", and x>&y is "fd[x] = fd[y]". That's why order matters. |
| 23:49 | <@Derakon> | Yeah, I keep forgetting how that works. |
| 23:49 | <@Derakon> | Part of the problem being that I have "2>&1|less" encoded in my muscle memory. |
| 23:50 | <@Derakon> | Hrm...catting proc/foo/fd/1 and proc/foo/fd/2 doesn't seem to be capturing this output. |
| 23:50 | <@Derakon> | Mind, I do still have the original session that started the process open. |
| 23:51 | <@Derakon> | So maybe that has a claim on the file descriptors. |
| 23:51 | <@ToxicFrog> | Oh |
| 23:52 | <@Derakon> | Hmm...and having closed that session, now I get "Input/output error" when I try to cat it. |
| 23:52 | <@Derakon> | ("it" being /proc/foo/fd/*) |
| 23:52 | <@ToxicFrog> | Welp |
| 23:53 | <@Derakon> | ls -l on the fds says they redirect to "/dev/pts/1 (deleted)" |
| 23:53 | <@Derakon> | So much for that idea! |
| 23:56 | <@Derakon> | The problem I have here is that I now have no way to verify that the program is healthy. |
| 23:57 | <@Derakon> | I don't want to throw away ~8 hours' worth of processing time, especially since I have no idea how long it'll take to finish and my boss needs this data before he leaves on a trip on Friday... |
| 23:57 | <@Derakon> | Wish I'd gotten the damned redirect done properly when I started this. |
| --- Log closed Wed Jan 19 00:00:56 2011 |