code logs -> 2012 -> Thu, 18 Oct 2012< code.20121017.log - code.20121019.log >
--- Log opened Thu Oct 18 00:00:14 2012
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00:38 * Azash cries in defeat
00:39
< Azash>
I just ended up doing the old mv-instead-of-cp on some semi-important db hosted on my server
00:39 * Azash is currently dd'ing the entire drive to an image on a friend's box for recovering files
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00:44
<&ToxicFrog>
...no backups?
00:44
< Azash>
I had a manual backup, which was the victim of said mv/cp confusion
00:44
< Azash>
I've learned from this, though ( ._.)
00:44 * Azash is reading up on cron jobs while the dd is working
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14:07
< Tarinaky>
Pseudocode/algorithm question!
14:07
< Tarinaky>
I'm being very naughty and iterating through the elements of a stack.
14:08
< Tarinaky>
Can I get away with this? (I am not modifying the stack - it's just more convenient than copying the stack and then popping the elements from the copy)
14:10
< Tarinaky>
Although I suppose copying the stack would involve accessing elements not on the top... am I overthinking this?
14:11
< rms>
I think it is probably fine, make sure to document wtf you are doing
14:12
< Tarinaky>
My main concern is it's an algorithm and datastructure's course.
14:12
< Tarinaky>
Where we're going to be marked on our understanding of stacks etc...
14:12
< Tarinaky>
So I have concerns beyond "does it compile" :p
14:12
< Tarinaky>
bbiab, lecture.
14:15
< rms>
I wouldn't know then, can you talk with your prof about it?
14:16
< Syk>
you get an int and a char
14:16
< Syk>
you put the int in a glass bowl, where the char used to be
14:17
< Syk>
int char stack, etc etc
14:18
< rms>
My concerns are mostly with clean, readable code
14:20 * TheWatcher eyes Tarinaky
14:21
<@TheWatcher>
Tarinaky: why are you interating over the stack, anyway? My suspicion at this point is that, if the exercise is supposed to be testing understanding of stacks, and you're doing something like that then a) the exercise and its use of stacks is too contrived, or b) you've misunderstood something.
14:25
<@TheWatcher>
(I also note that you'll usually find that university programming exercises tend to focus on whether you know how to use the concepts, not whether you can optimise the crap out of it, and will generally /expect/ solutions that are suboptimal to an experienced programmer)
14:31 * iospace double takes at this code
14:31 * iospace pfffts
14:32
< iospace>
Print(L"%EOut of memory, are you running Emacs?.\n");
14:33
< Syk>
hey iospace
14:33
< Syk>
guess what
14:33
< iospace>
what?
14:33
< Syk>
I'm resigning on Monday!
14:33 * Syk holds a party
14:33
< iospace>
heh
14:33
< iospace>
figures :P
14:34
< Syk>
iospace: discovered that the CEO was basically bragging about not renewing my mother's contract
14:34
< Syk>
the fucker is an absolute slimeball
14:34
< Syk>
and I know he'll fuck me over once I'm not needed anymore
14:35
< iospace>
yup
14:35
< Syk>
so yeah
14:35
< Syk>
he was bragging at a conference about a week before he told her
14:35
< Syk>
the man does not have a single professional bone in his body
14:36
< iospace>
... yeah
14:36
< iospace>
sounds like it
14:39 * Syk flops on iospace.
14:39
< Syk>
so yeah, considering selling off all of my PCs
14:39
< Syk>
maybe getting a laptop or something
14:39
< iospace>
why?
14:40
< Syk>
well, moving is expensive
14:40
< Syk>
so I can sell off everything here, then just buy stuff when i've settled
14:41
< Syk>
just take my SSDs, raspi and external HDDs with data
14:41
< Syk>
(moving stuff out of this town is /fuckawful/ expensive)
14:42
< iospace>
i think it would be more expensive to rebuy everything than moving it...
14:43
< Syk>
well, I need to get a new desk, new bed, etc
14:43
< Syk>
which I would buy when moved
14:43
< Syk>
so literally all I will be taking is my clothes and my PCs
14:44
< Syk>
and maybe some books and stuff, maybe
14:44
< Syk>
oh and the pile of [REDACTED]
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14:57
< Tarinaky>
TheWatcher: It's taking a random walk through a graph.
14:57
< Tarinaky>
TheWatcher: It needs to remove nodes that are already part of the walk/stack from the list of valid nodes it could take.
14:57
< Tarinaky>
Because loops are banned.
14:58
<&ToxicFrog>
loops as in iteration, or loops as in cycles in the graph?
14:58
< Tarinaky>
Cycles in the graph.
14:59
< Tarinaky>
Cyclic walks are not allowed.
14:59
< Tarinaky>
Also, bbiab - need to walk home.
14:59 gnolam [lenin@Nightstar-ccbf4b44.cust.bredbandsbolaget.se] has quit [[NS] Quit: Reboot]
15:00
<&ToxicFrog>
...so, you need to randomly generate a path that visits each node in the graph exactly once?
15:00
<&ToxicFrog>
What happens if the graph is such that this is impossible?
15:01
<@TheWatcher>
Last I heard that problem had a well-known name ¬¬
15:02
< Syk>
man, i have the travelling salesman problem all the time at work
15:02
<&ToxicFrog>
Except this isn't TSP?
15:03
< Syk>
i thought 'visit each node exactly once' was TSP?
15:03
<&ToxicFrog>
No
15:03
< Syk>
or is that 'in shortest time'
15:03
<&ToxicFrog>
TSP is "visit each node at least once with the lowest cost"
15:03
<&ToxicFrog>
Visiting the same node multiple times is allowed if it results in the shortest possible path that hits all nodes.
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15:04
< Syk>
then what's the node-only-once problem named?
15:05
<@TheWatcher>
Eulerian path
15:05
<&ToxicFrog>
There's often the additional restriction that the path be a closed loop, but I forget if (a) this is formally required and (b) if so, if it actually changes the problem at all
15:05
<@TheWatcher>
Oh, wait, that's edges, isn't it?
15:06
< Syk>
http://en.wikipedia.org/wiki/Seven_Bridges_of_K%C3%B6nigsberg
15:06
< Syk>
is it this?
15:06
< Syk>
oh wait that's paths not nodes
15:06
<@TheWatcher>
Hamiltonian path is the right one
15:07
<@TheWatcher>
(I always mix those two up)
15:07
< Syk>
wait
15:07
< Syk>
TSP is node only once, plus returns to origin
15:07
<@TheWatcher>
(note: it's NP-complete, which means the prof is a dick ¬¬)
15:07
< Syk>
with lowest possible cost
15:07
< Syk>
problems are hard
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15:12
<&ToxicFrog>
I had a lot of fun with TSP in my algorithms course.
15:13
< Tarinaky>
Okay, waiting for advisory. So back for a bit.
15:13
< Tarinaky>
ToxicFrog: No. I need to visit some number of nodes exactly once.
15:13
< Tarinaky>
ToxicFrog: Some number being 'given' along with the start.
15:14
< Tarinaky>
If no path is possible then just fail.
15:14
<&ToxicFrog>
Aah.
15:16
<&ToxicFrog>
So, you're given a graph, a starting node, and count; you return either a path that visits count nodes, starting from start, exactly once each, or fail if that is not possible (because count is greater than the graph size, or it's impossible to construct a path that visits count nodes in it without revisiting at least one node)
15:16
< Tarinaky>
Correct.
15:17
<&ToxicFrog>
And the graph is guaranteed to be acyclic.
15:17
< Tarinaky>
No. The graph is nondirected.
15:17
< Tarinaky>
The path has to by acyclic.
15:18
<&ToxicFrog>
That's already implied by "exactly once".
15:18
< Tarinaky>
Okay. But the graph is very much cyclic.
15:18
< Tarinaky>
Hence the need to remove edges to nodes that are already on the stack.
15:19
< RichyB>
guh
15:22
< Tarinaky>
But just to check, it is very much 'bad' to iterate through a stack?
15:31
<&ToxicFrog>
Strictly speaking, you're not meant to be able to do that with a stack
15:31
<&ToxicFrog>
You "iterate" a stack by popping each item and processing it in turn
15:32
<@TheWatcher>
The fact that you're able to means that you're bypassing the encapsulation, which is probably not what you're expected to do
15:34
< Tarinaky>
What stops you popping the elements into another stack?
15:34
<&ToxicFrog>
Nothing.
15:34
< Tarinaky>
And then popping them back again?
15:34
<&ToxicFrog>
Also nothing.
15:34
< Tarinaky>
Is this not an iteration through a stack?
15:34
<&ToxicFrog>
Er
15:35
<&ToxicFrog>
I was interpreting your question as "iterating the contents of the stack in place", ie, without popping anything
15:35
<&ToxicFrog>
Which some stack implementations let you do
15:35
< Tarinaky>
Well, I am... but that's not necessary.
15:36
< Tarinaky>
Surely that's a detail?
15:36
<&ToxicFrog>
If you find yourself needing to do this repeatedly, a stack is probably not the right data structure
15:38
< Tarinaky>
Can you push/pop the end of a list?
15:38
< Tarinaky>
Or is it called something else?
15:38
< Tarinaky>
>.>
15:39
< iospace>
append remove? :P
15:39
< Tarinaky>
I guess.
15:39 * iospace shrugs
15:39
< Tarinaky>
Remove from end?
15:39
< Tarinaky>
Remove last of?
15:40
< iospace>
I have the UEFI 2.3.1 spec, PCIe 2.1 spec, and ACPI 4.0a spec open atm
15:42 * Syk looks around her room for books
15:42 * Syk opens her SQLite reference!
15:42
< Tarinaky>
I have no idea what I'm doing wrt pseudocode formatting >.<
15:42 * Syk has no other good technical books :C
15:44
< Tarinaky>
What's the proper name for a dynamic array datastructure? Is it actually a vector?
15:45
< iospace>
Syk: these are PDFs, but same concept :P
15:46
< Syk>
:U
15:47
< iospace>
(that should give you some hint as to what i'm doing, but nyah :P)
15:47
< Syk>
i prefer bewks
15:47
< Syk>
because then i can open them
15:47
< Syk>
and look at the studiously
15:48
< Syk>
and then people don't talk to me
15:49
< iospace>
i'm not going to have 3 300+ page specs on my desk dear
15:49
< Syk>
iospace: lolol there's a position open at a nuclear reactor in Canberra
15:50
< Syk>
doing sysadmin work there
15:50
< Syk>
iospace: pfffft
15:50 * Syk dumps her pile of SCO Unix manuals on iospace's desk
15:50
< iospace>
actually the PCIe 2.1 spec is the shortest: 704 pages
15:51
< iospace>
ACPI 4.0a is 731
15:51
< Syk>
the SCO unix books all up are like
15:51 himi [fow035@Nightstar-5d05bada.internode.on.net] has quit [Ping timeout: 121 seconds]
15:51
< iospace>
and UEFI 2.3.1 is...
15:51
< Syk>
10" tall?
15:51
< iospace>
2210 pages
15:51
< Syk>
the fucking
15:51
< Syk>
the fucking raid card has like a 300 page manual
15:52
< iospace>
yeah and?
15:52
< Syk>
it's a raid card
15:53
< Syk>
HP one came with like a 40 page PDF
15:53
< iospace>
lets look at the datasheet for the Intel 82574 shall we?
15:53
< iospace>
this is just a simple ethernet controller
15:53
< iospace>
490 pages
15:53
< Syk>
it just boggles the mind how it's a 300 page /user/ guide
15:54
< RichyB>
iospace: I think that you are understating the potential upsides here.
15:54
< RichyB>
For instance, you could have a bookfort.
15:55
< RichyB>
Manual-fort, even.
15:55
< Syk>
i love how Xerox give you a manual that contains like 1,000 error codes
15:55
< RichyB>
If I worked with loads of kit with 400+page manuals, I'd insist on having paper copies of all of it, just to punish the world for inflicting 400+page standards on me.
15:55
< Syk>
nearly every single one that isn't 'paper jam' isn't in the book
15:55
< iospace>
RichyB: they're PDFs :P
15:55
< iospace>
i have a cube :P
15:56
< RichyB>
You could have replaced your cube's walls with stacks of datasheets and manuals by now.
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16:00
< Syk>
i would turn the protocol implementation specs for fucking UPnP into a dartboard
16:00
< Syk>
my main problem with
16:00
< Syk>
zeroconf protocols
16:00
< Syk>
is that when they don't work
16:00
< Syk>
there's nothing to configure to /make/ them work
16:02
< froztbyte>
eh?
16:03
< froztbyte>
maybe I'm not understanding what you mean
16:03
< froztbyte>
but there's a lot of ways in which things can go wrong there, and some of them are hardly the protocol's fault
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16:04
< Syk>
according to this, UPnP works on my machine, and it can see everything else
16:04
< Syk>
then nothing can see it?
16:04
< Syk>
even though it's set up to
16:04 * Syk throws a brick at it. Spent four hours trying to figure out why XBMC wasn't sharing media the other day :|
16:06
< froztbyte>
right
16:06
< froztbyte>
so
16:06
< froztbyte>
there's two parts
16:06
< froztbyte>
one is consuming announces/broadcasts, the other is responding to broadcasted queries
16:07
< Syk>
yes
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16:07
< froztbyte>
I'd hazard a guess that it's the latter that's causing you pain
16:07
< Syk>
which is annoying because
16:07
< Syk>
uh 2 sec
16:07
< froztbyte>
what OS, btw?
16:07
< froztbyte>
and what are you trying to make work?
16:08
< Syk>
Ubuntu 12.04 and XBMC media sharing
16:10
< froztbyte>
if you run `avahi-discover -a` on the xbmc host, do you see it listing the service there?
16:11
< froztbyte>
also, is there anything else by avahi listening which might be blocking xbmc's ability to bind(), thus leading to xbmc failing?
16:11
< froztbyte>
(I don't know if xbmc announces by itself, or links into avahi through dbus)
16:13
< Syk>
XBMC hooks into avahi iirc
16:14
< Syk>
not sure
16:14
< Syk>
avahi-browse -a says that it appears
16:15
< Syk>
on both my raspi and my local PC
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18:14
<&McMartin>
"12.10 also includes Python 3.2.3 as standard, dropping Python 2.x"
18:14
<&McMartin>
Ruined Forever~
18:14
< Azash>
12.10 of what?
18:15
<&McMartin>
Ubuntu
18:15
<&McMartin>
Came out today
18:15
< Azash>
Ah
18:17
< ErikMesoy>
Ruined Forever indeed *nods sagely*
18:17 * Azash strokes his fu manchu, nodding
18:18
< Azash>
(as a non-pythonist, I have no idea what the issue is)
18:18
<&McMartin>
Python 2 and Python 3 are effectively different languages.
18:18
<&McMartin>
with vaguely similar libraries and syntax that is almost but not quite identical.
18:19
< Tarinaky>
Basically Python really is the new Perl.
18:19
<&McMartin>
But in time instead of space.
18:19
<&McMartin>
With Perl, everything works great if your system has the right constellation of extra packages installed from 97 different web sites.
18:20
<&McMartin>
With Python, everything works great as long as you're running exactly the right point release of the software.
18:20
< froztbyte>
Ubuntu has been fucked for a long time already
18:20
< Tarinaky>
Yeah, 2.7 :p
18:21
< froztbyte>
the fact that canonical's been the main driving force behind py3 should pretty much tell anyone all they need to know
18:21
< froztbyte>
and if what they take away from that is "Canonical is very forward-thinking", please just lock them in a room and vent the oxygen
18:21
<&McMartin>
Tarinaky: I can only assume 2.7 is installed on Windows.
18:22
<&McMartin>
In order to not get "hey, shit DFW" in Ophis I had to target 2.3.
18:22
< Tarinaky>
I have 2.7, 3.2 and whatever Panda3D ships with...
18:22
< Tarinaky>
Oh!
18:22
< Tarinaky>
And I have the same again for Cygwin!
18:23
<&McMartin>
Heh
18:23
<&McMartin>
Reason 1 I prefer MSYS >_>
18:23
< Azash>
froztbyte: Well, what do you see as the main reason for canonical carrying python 3?
18:23 * McMartin is going to throw together a VM to see what this actually means
18:23
< froztbyte>
Azash: they're crazy?
18:23
< froztbyte>
seriously, I can't give you a good answer
18:23
<&McMartin>
If it just means "python3 is installed by default and all their internal scripts use it", sure, whatever, *somebody's* got to get the uptake going on
18:23
< Tarinaky>
McMartin: I explicitly chose to install Python for Cygwin because I prefer the *nix environment when I'm working.
18:24
< froztbyte>
there's no good reason for py3 to exist in the form it does
18:24
< froztbyte>
and python-dev has /no intention whatsoever/ to fix the disaster that py3 is atm
18:24
<&McMartin>
If it's "when you do your distro update all your Python 2 scripts stop working" they're on crack.
18:24
< froztbyte>
so I can honestly not think of a reason for canonical to care about it other than "the number is bigger"
18:24
< Tarinaky>
I think Ubuntu is like... one of the last distros to decide to update to Python3.
18:25
<&McMartin>
Python 3's big win, IIRC, is that it's much better at not being shitty about text than Python 2
18:25
<&McMartin>
It's *possible* to write acceptable text processing P2 but you have to work at it.
18:25
< Azash>
Personally I'd have imagined that they are really just pushing for a newer version, well-thought-out or not
18:26
< froztbyte>
Azash: when you're doing something at the scale of a distro as big as ubuntu, that's not really a good reason
18:26
< Azash>
But if the language devs refuse to work on the new version of the language it probably has bigger problems than Ubuntu's choice of version :P
18:26
<&McMartin>
Language devs are like Warhammer 40k grognards
18:26
<&McMartin>
They're the last people to ask~
18:26
< froztbyte>
Azash: "the language devs"
18:26
<&ToxicFrog>
froztbyte: why do you hate py3 so much?
18:26
< froztbyte>
py-dev has basically just been taking over by retards
18:27
< Azash>
froztbyte: Well.. What do you mean by python-dev then? People who use python to develop?
18:27
< froztbyte>
ToxicFrog: because, like much else humanity does, it's a completely pointless waste of time?
18:27
<&McMartin>
MALLOC() AND FUNCTION POINTERS WERE GOOD ENOUGH FOR ME BACK IN 1984 AND WE DON'T NEED NO C++ERY AND NEW AND DELETE HERE
18:27
< froztbyte>
they had the opportunity to fix *real* problems
18:27
< froztbyte>
and they just didn't
18:27
< froztbyte>
Azash: python-dev is the list in charge of python fixes
18:27
< froztbyte>
and the main breeding-ground for, basically, anything that'll become a thing
18:28
< Azash>
Right
18:28 * Azash is quietly thankful for never being interested in Python
18:28
< froztbyte>
ToxicFrog: much of my year has been spent yak shaving on bullshit that's 1) completely unnecessary, 2) should never really have existed in the first place
18:28
<&McMartin>
Yeah, if I go into grognard mode, it's worth noting that I would claim Python cannot become a real language until python-dev dies.
18:28
< Tarinaky>
2.7 is still perfectly useable.
18:28
< Tarinaky>
:p
18:28
< froztbyte>
so I'm just seriously low at my tolerance factor
18:29
< froztbyte>
afaict, the future of python lies in pypy's hands
18:29
< froztbyte>
python as we know it, anwyay
18:29
< froztbyte>
anyway*
18:29
<&McMartin>
Azash: Python is actually the best single language to know if you're going to know only one.
18:29
< froztbyte>
yeah you can do far worse than python
18:29
<&McMartin>
Works everywhere, covers all the major programming styles without much bullshit, code by other people is very, very easy to read
18:29
< Azash>
McMartin: I'm sure, it just never interested me 'sall
18:30
< Tarinaky>
The main issue I am aware of re Python is the issue with threading.
18:30
<&ToxicFrog>
McMartin: why?
18:30
<&McMartin>
TF: At what?
18:30
<&McMartin>
I've made a bunch of claims
18:30
< froztbyte>
McMartin: yeah, it takes an exceptional idiot to make very-hard-to-read python code
18:30
<&ToxicFrog>
"python cannot become a real language until python-dev dies"
18:30
<&McMartin>
Oh
18:31
<&McMartin>
A real language has a spec~
18:31
<&McMartin>
Ideally also multiple implementations~
18:31
<&McMartin>
Last I looked at Pypy we've *almost* reached "multiple implementations" level.
18:31
< Tarinaky>
Write once, debug everywhere!
18:32
<&McMartin>
Tarinaky: Yeah, not having that shit happen in Python is one of the reasons I'm calling out "works everywhere"
18:32
<&McMartin>
Lots of stuff claims to
18:32
<&McMartin>
Python *actually does* unless you're directly dealing with something that the target OS is unique about
18:32
< Tarinaky>
I suspect multiple implementations will cause that to happen though.
18:32
<&jerith>
McMartin: pypy is as close to compatible with CPython as any two language implementations are.
18:33
<&ToxicFrog>
Er
18:33
<&jerith>
The incompatibilities are almost all in "implementation detail" land, like the CPython extension API.
18:33
<&McMartin>
jerith: OK then, I suppose I can call 2.7.2 a real language then~
18:33
<&ToxicFrog>
Doesn't python have CPython, Jython, Stackless, and PyPy all in common use?
18:33
< froztbyte>
no
18:33
< froztbyte>
CPython is by far the most common
18:33
<&ToxicFrog>
froztbyte: "cpython is the most common" in no way contradicts my statement, though?
18:33
< froztbyte>
Stackless has seen some use in funky environments, PyPy is pretty new on the block
18:34
<&jerith>
(The rest are "the tests don't cover this case" and rare "we haven't bothered rewriting this stdlib extension module".)
18:34
< froztbyte>
and Jython is enterprise country
18:34
<&McMartin>
ToxicFrog: Everything on yoru list but PyPy implements a different language with similar syntax.
18:34
<&ToxicFrog>
I see pypy come up all the time, stackless seems to get used a fair bit in MMOs and other server stuff
18:34
<&ToxicFrog>
Jython comes up all the fucking time when I'm looking at JVM stuff
18:34
< froztbyte>
in terms of usage count, I'd call cpython the 85% and the others fight over the remaining 15
18:34
<&McMartin>
Jython is no more CPython than Clojure is Scheme.
18:34
<&jerith>
Jython is 2.5-compatible.
18:35
<&jerith>
The memory model is all different, because it's on the JVM, but not more different than pypy's.
18:35
<&jerith>
The main reason Jython ends up looking different is because it tends to only be used when you want to call into (or out of) Java code.
18:36
<&jerith>
And then you end up writing Java with Python syntax a lot.
18:36
<&McMartin>
Right
18:36
<&McMartin>
This is me in grognard mode
18:36
<&McMartin>
But it's actually possible for me to reverse that
18:37
<&McMartin>
"Well, the language spec is the same but the operating library is totally different"
18:37
<&jerith>
Stackless is a fork of CPython with a rewritten execution model.
18:37
<&jerith>
"operating library"?
18:37
<&ToxicFrog>
Stuff you can import.
18:37
<&ToxicFrog>
Presumably.
18:38
<&McMartin>
jerith: The core language can't do much beyond arithmetic.
18:38
<&McMartin>
If you want to actually *do work* you're calling into the language's library
18:38
<&McMartin>
Jython's effective "standard library" - the bits that are actually used in it - are wildly different and 100% incompatible with every other implementation.
18:38
<&jerith>
Ah.
18:38
<&McMartin>
Normally I would not want to argue this case with ToxicFrog, however
18:39
<&McMartin>
Because I am aware that this is like saying "Lua is a different language when you use it to script WoW than when you use it to script Aquaria"
18:39
<&McMartin>
But, well
18:39
<&McMartin>
From a "what the hell does this code do" standpoint, it kind of is~
18:39
<&ToxicFrog>
Actually, under this definition, I think Lua is more of a "real language" than python~
18:40
<&McMartin>
ToxicFrog: Yeah
18:40
<&McMartin>
If I want to be more precise and less trolly
18:40
<&jerith>
I don't know about the state of Jython's stdlib, but most of CPython's is written in Python.
18:40
<&McMartin>
Lua is now an unkillable language.
18:40
<&ToxicFrog>
(there are two commonly used implementations, PUC-lua and luajit, which are compatible in both standard libraries and the C API/ABI)
18:40
<&McMartin>
Meanwhile, Haskell, as a language, has a truck factor of like 4.
18:40
< iospace>
truck factor?
18:41
<&ToxicFrog>
(luajit has some extensions not present in puc-lua, like the FFI library, but - unless you hit a bug in the JIT - you can take puc-lua code and run it in/link it against luajit without modification)
18:41
<&McMartin>
iospace: What is the minimum number of people that need to be hit by trucks to kill the project permanently
18:41
<&ToxicFrog>
(granted, this is a lot easier in Lua because the standard library is tiny)
18:41
<&jerith>
pypy actually just includes a copy of the CPython stdlib with another (much smaller) pypy-specific set of code that mostly implements things that CPython did in C.
18:42
<&McMartin>
jerith: Oh good, they've discovered bootstrapping, and have done so without going mad from the revelation the way the Perl guys did
18:42 * McMartin grumbles at Pypy. "have an AOT compiler!"
18:42
<&jerith>
AOT?
18:42
<&jerith>
pypy is actually two different things.
18:44
<&ToxicFrog>
Ahead Of Time.
18:44
< iospace>
McMartin: ah
18:44
<&ToxicFrog>
Ie, a thing you can run to emit bytecode/object code without actually needing to load and run the program.
18:44
<&jerith>
There's the Python implementation (which is called pypy) and there's the build-a-VM-with-JIT toolkit (which is also called pypy).
18:45
<&ToxicFrog>
(or, in the case of Clojure, a thing that loads and runs the program but stops short of actually calling any functions you just defined, which confused me terribly when I first used it)
18:45
<&jerith>
I can't remember if pypy's bytecode is actually different from CPython's.
18:45
<&ToxicFrog>
McMartin: what did the Perl guys do?
18:46
< RichyB>
Does using "CRUD" as a verb make sense to people?
18:47
< RichyB>
"create an administrator-only page which lets you CRUD payroll records", for instance.
18:47
< iospace>
RichyB: yeah, i've heard it in that use before
18:48
< iospace>
but i forget what i means ^^;;
18:48
< EvilDarkLord>
Makes sense to me.
18:48
<&ToxicFrog>
Create, Retrieve, Update, Delete, IIRC.
18:58 * iospace shrugs
18:58 * iospace sighs at 3-4 minute build times
19:02
< froztbyte>
haha
19:02
< froztbyte>
you've got it lucky
19:02
< froztbyte>
some of my embedded-dev friends have multi-hour build times
19:02
< froztbyte>
multi-day if they hit the full target suite
19:04
<&jerith>
That stuff needs to be fixed.
19:04
<&jerith>
My full test run takes nearly three minutes.
19:15
< RichyB>
PrBoom compiles in about 10 seconds these days. :3
19:21
< iospace>
froztbyte: our BIOS is actually pretty sparse compared to one you'd find on a modern computer
19:22
< iospace>
mind you the 3-4 minutes also includes reprogramming
19:24
< froztbyte>
iospace: yeah, I'm familiar with the stuff
19:24
< froztbyte>
it's dedicated purpose test-and-jump sort of things
19:24
< froztbyte>
but theirs is also ;)
19:25
< iospace>
:P
19:29
< iospace>
but yeah
19:29
< iospace>
are they UEFI devs?
19:29
< froztbyte>
one is
19:29
< froztbyte>
or rather, has had to deal with it
19:40
< iospace>
ah
20:07 Kindamoody is now known as Kindamoody[zZz]
20:14
<&McMartin>
OK, Ars Technica is, once again, full of shit
20:14
<&McMartin>
"python" in Quantal hands you 2.7.3
20:14
<&McMartin>
But yes, python3 is also installed by default now
20:19
<&McMartin>
Ha ha ha ha ha at the ubuntu.com homepage
20:19
< gnolam>
?
20:20
< Azash>
gnolam: It says something like "avoid the pain of Windows 8"
20:20 Vash [Vash@Nightstar-3ba4108e.wlfrct.sbcglobal.net] has joined #code
20:20 mode/#code [+o Vash] by ChanServ
20:25
<&McMartin>
OTOH, it took about 20 seconds for Compiz to crash on my VM of QQ
20:25
<&McMartin>
So I think I'll be holding off on any upgrades for awhile.
20:26 * iospace looks at this code, wonders why the use of pointers
20:29
< iospace>
... it's passing a 32 bit uint as a pointer... and the value of that variable doesnt' change
20:29
< iospace>
oh never mind, i see why
20:30
< iospace>
though that brings up another question for another day
20:33 Derakon [chriswei@Nightstar-a3b183ae.ca.comcast.net] has joined #code
20:33 mode/#code [+ao Derakon Derakon] by ChanServ
20:33 * Derakon ponders distributions.
20:34
<&Derakon>
Okay, so I have this image, with associated histogram: http://derakon.dyndns.org/~chriswei/temp2/histogram.png
20:35
<&McMartin>
Oh, that kind of distribution >_>
20:35
<&Derakon>
I'm trying to figure out why there are buckets in the histogram that have twice as many peaks as their neighbors do.
20:35
<&McMartin>
Those buckets are oddly regular.
20:35
<&Derakon>
Note that there are only 149 distinct values in the image (min 220, max 369) and the histogram is made of 128 buckets.
20:36
<&Derakon>
McM: with an image of, basically, noise you would expect a Gaussian distribution.
20:36
<&Derakon>
And I have that except for the weird peaks.
20:36
<&Derakon>
If I use more buckets then the peaks go away...
20:36
<&Derakon>
But that's not necessarily practical.
20:36
< EvilDarkLord>
How many more buckets?
20:37
<&Derakon>
Equal to the number of unique values in the image is the only test I've done.
20:37
<&Derakon>
I assume that if the number of buckets divides the (max - min) range in the image then I would have no peaks.
20:37
< EvilDarkLord>
Oh, right. Well, I guess there's a bunch of (X - X+1) buckets here.
20:37
<&Derakon>
...ahh, and a few [X, X+2] buckets.
20:38
<&Derakon>
That makes sense.
20:38
<~Vornicus>
128 buckets, 149 distinct items? one moment...
20:39
<~Vornicus>
Yes, there will be peaks because there are more than one thing that fits in some but not all buckets
20:39
<&Derakon>
I don't follow.
20:40
< EvilDarkLord>
You have buckets like 220,221,222,223,224,225-226,227,228,...
20:40
<&Derakon>
Yeah, I understand the problem, just not Vorn's sentence~
20:41
<~Vornicus>
what edl said.
20:41
< EvilDarkLord>
Right, right. I'm not sure why there seems to be just 12 odd peaks when the difference between distinct items and bucket count is 21, but maybe it's just noise or I'm not seeing the tinypeaks.
20:41
<~Vornicus>
but about one bucket out of every 6 or so will have two distinct values in it instead
20:42
<&Derakon>
EDL: it's because there's a lot of tiny buckets you can't see.
20:42
<~Vornicus>
And, yeah, the ones beyond the edge of the bell curve you have there you can't see anyway
20:42
<&Derakon>
There are 512x528 pixels there, so the bigger buckets are much bigger than the small ones.
20:43
< EvilDarkLord>
Those buckets that show up as 1 pixel actually contain quite a few matches each, right?
20:43 Derakon_ [chriswei@Nightstar-a3b183ae.ca.comcast.net] has joined #code
20:44
< Derakon_>
EDL: yes, they do.
20:44 Derakon [chriswei@Nightstar-a3b183ae.ca.comcast.net] has quit [NickServ (GHOST command used by Derakon_)]
20:44 Derakon_ is now known as Derakon
20:44 mode/#code [+ao Derakon Derakon] by ChanServ
20:44
<&Derakon>
Now I'm presented with the problem of prime data ranges.
20:45
<~Vornicus>
Well
20:45 Derakon_ [chriswei@Nightstar-a3b183ae.ca.comcast.net] has joined #code
20:45
<~Vornicus>
you can dither or something.
20:45
< Derakon_>
Okay, what the hell.
20:45
< Derakon_>
Stupid IRC-over-SSH.
20:46
< iospace>
Derakon_: let me guess, you're using PuTTY and you accidentally opened and closed it too fast? :P
20:46
< Derakon_>
Ideally I would use non-integer-sized buckets, but that would require using numpy.histogram instead of numpy.bincount, which is slower.
20:46
< Derakon_>
iospace: cygwin's SSH client, and it seems to disconnect at random.
20:47
< Derakon_>
And if I have too much typed out then it'll give me a broken pipe error.
20:47
< Derakon_>
(Er, lag, not disconnect)
20:47
< iospace>
ah
20:47
< Derakon_>
Since both times were me typing out a long sentence while waiting for my connection to de-lag.
20:48
< Derakon_>
I wouldn't have to do this crap if the uni allowed IRC but noooooo
20:48
< rms>
use screen man
20:48
< Derakon_>
I never did get used to screen.
20:49
< Derakon_>
Also I usually IRC via X-Chat Aqua, which isn't screenable.
20:49
< EvilDarkLord>
Derakon_: By the way, what am I looking at in this picture? Where does this noise come from?
20:50
< iospace>
Derakon_: i use screen too, the putty thing i mentioned causes an issue with screen o_O
20:50
< Derakon_>
EDL: the noise comes from a lack of signal. The exposure is short and the camera has no lens.
20:51 Derakon [chriswei@Nightstar-a3b183ae.ca.comcast.net] has quit [NickServ (GHOST command used by Derakon__)]
20:51 Derakon [chriswei@Nightstar-a3b183ae.ca.comcast.net] has joined #code
20:51 mode/#code [+ao Derakon Derakon] by ChanServ
20:51
<&Derakon>
Okay, this time I blame Comcast.
20:53
<&ToxicFrog>
Derakon: ZNC on the server, have it listen on the https port?
20:54
<~Vornicus>
ooh ooh, gaussian blur!
20:54
<~Vornicus>
:P
20:59 Derakon_ [chriswei@Nightstar-a3b183ae.ca.comcast.net] has quit [[NS] Quit: Lost terminal]
21:01 Derakon [chriswei@Nightstar-a3b183ae.ca.comcast.net] has quit [[NS] Quit: Lost terminal]
21:04
< iospace>
there goes dera
21:20
<~Vornicus>
apparently the thought of using gaussian blur on a histogram was too much for him.
21:21
<~Vornicus>
Anyway the real way I'd do it is make exactly the number of buckets as there are distinct values, and then if you need to do an area-type interpolation to get wider buckets.
21:45
< iospace>
ALL THE ERRORS!
21:46
<&McMartin>
EMIT or FIX?
22:08
< iospace>
no clue
22:08
< iospace>
:D
22:12
< iospace>
it builds
22:12
< iospace>
but will it work? not likely ^_^
22:14
< iospace>
man i love `.
22:16
< RichyB>
That reminds me
22:16
< RichyB>
I should find something that can put out a 5GHz 802.11n network.
22:16
< RichyB>
I have a USB wifi adapter for whose chipset there exists a Linux driver supplied by the mfg... which kernel panics the machine after a few seconds of us.
22:17
< RichyB>
I'm thinking I might be able to use USB pass-through with VirtualBox so that I can have a tiny little VM die rather than my entire laptop.
22:18
<&McMartin>
Possibly
22:18
<&McMartin>
Good luck with generic USB passthrough on VBox.
22:18
<&McMartin>
But there was a new release today, so, uh, let me know how it goes
22:18
< RichyB>
Any alternatives that might make that easier?
22:18
<&McMartin>
Not really
22:18
< RichyB>
I say VirtualBox because that's what I have to hand.
22:18 * McMartin has had marginally better luck with peripherals on VMware Player than VBox, but.
22:18
<&McMartin>
By all means, try VBox first
22:20
< iospace>
aw bollocks
22:20
< iospace>
i hit clean build
22:20
< Azash>
I acquired vmware workstation through extremely legal means the other day and I'm really liking it
22:20
< iospace>
fuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu
22:20
< Azash>
iospace: Oops
22:20
< iospace>
10 minute builds anyone? -_-;;
22:20
< RichyB>
iospace oops.
22:21
< RichyB>
Eh, I've had builds longer than that.
22:21
< RichyB>
...several upgrades and some work towards shortening them ago.
22:21
< iospace>
clean builds take that long
22:21
< iospace>
hopefully this builds Dx
22:23
< RichyB>
Make a cup of tea?
22:24
< iospace>
maybe :D
22:24
< Azash>
Listening to some uplifting house music?
22:27
< iospace>
build finished, of course errors
22:28
< iospace>
built that time
22:31 ErikMesoy is now known as ErikMesoy|sleep
22:32 RichyB [richardb@Nightstar-3b2c2db2.bethere.co.uk] has quit [[NS] Quit: Leaving]
22:39
< iospace>
great, have to clean build this time intentionally Dx
22:42
< iospace>
...
22:42
< iospace>
using an if statement instead of a switch for an enum?
22:42
< iospace>
really?
22:44
<~Vornicus>
well if you're just checking one enum value maybe
22:46
< iospace>
there's three values in the enum
22:46
< iospace>
he checks all three
22:47
< iospace>
his code is /very sloppy/
22:47
< iospace>
and could easily be broken -_-;;
22:47
< iospace>
6.5 minutes is the build time on a fresh build btw
22:47
< Azash>
You should get like a gameboy or something and bring it to work
22:48
< iospace>
haha
22:48
< iospace>
nah, i'm looking over this guy's code which I've taken bits from
22:48
< iospace>
just so overbuilt and un-needed
22:51
< iospace>
ya know, i'm tempted to port what i wrote over to his and see how well it works :P
22:52
< iospace>
he does it in such an overly complicated way too -_-;;
23:01
< iospace>
i mean it /works/ but it's doing it wrong
23:02
< Azash>
Mm
23:02
< Azash>
Maybe he thought it seemed smarter to be complex?
23:03 Reiv [NSwebIRC@D4E70A.D52DB0.820B13.98C775] has joined #code
23:05
< iospace>
he was copying code from elsewhere
23:09 Derakon[AFK] is now known as Derakon
23:09 mode/#code [+ao Derakon Derakon] by ChanServ
23:10
<&Derakon>
Okay, I'm local. Let's see you boot me now! :p
23:12
< iospace>
/kick Derakon With Pleasure ^_^
23:13
< Azash>
iospace: Oh, well, that's just a bad idea
23:13
< Azash>
re. copying code
23:13
<&Derakon>
iospace: yeah, now, which one of us has ops?
23:14
< iospace>
i know :P
23:14
< iospace>
Azash: oh, i'm hacking it apart mind you
23:20 AnnoDomini [abudhabi@Nightstar-7e16dc65.adsl.inetia.pl] has quit [Ping timeout: 121 seconds]
23:21 AnnoDomini [abudhabi@Nightstar-7e16dc65.adsl.inetia.pl] has joined #code
23:21
< iospace>
actually what I did copy was actually the useful portions
23:21
< iospace>
though it'll probably get re-written down the line
23:23 himi [fow035@Nightstar-5d05bada.internode.on.net] has quit [Ping timeout: 121 seconds]
23:24
< Azash>
Rewritten ten times until nothing remains except objectinterfacesingletonfactoriessingletons
23:29
< iospace>
heh
23:29
< iospace>
hopefully my next task is to demolish his code
23:33
< iospace>
though i will say his "what are you running, Emacs?" error message for when you're out of memory is pretty witty :P
23:33
< iospace>
though it doesn't belong here
23:34
< iospace>
but most everything he does can be handled by a much simpler protocol
23:43
< iospace>
ugh, i hate it when you look at code and it's not commented enough
23:44
< Azash>
I hate when someone codes for like six hours and then they're like
23:44
< iospace>
son of a bitch
23:44 * iospace head desks
23:44
< Azash>
git commit -m "Added several features"
23:44
< iospace>
haha
23:45 * iospace flips tables Dx
23:45
< iospace>
ok you know what
23:45
< iospace>
fuck you pcie
23:45
< iospace>
fuck you ^_^
23:45
< Azash>
^_____________^
23:46
< iospace>
and fuck you pointers
23:46
< iospace>
^_^
23:46
< Reiv>
... you're using the smiling face over things you swear at?
23:47
< iospace>
Reiv: I'm a strange person :)
23:47
< iospace>
anyway
23:47
< iospace>
i have to head home before i rip my coworker a new one for bungling his code :P
23:47
< iospace>
later ^_^
--- Log closed Fri Oct 19 00:00:29 2012
code logs -> 2012 -> Thu, 18 Oct 2012< code.20121017.log - code.20121019.log >

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