--- Log opened Tue Apr 20 00:00:56 2010 |
00:15 | < Rhamphoryncus> | weeeee major milestone in my python static analyzer (the interesting part of my python compiler). It can now count up to 6500000000000000000 instantaneously :D |
00:17 | <@Vornicus> | All right then. |
00:18 | < Tarinaky> | Instantaneously? |
00:19 | | You're now known as TheWatcher[T-2] |
00:19 | <@McMartin> | "This loop does nothing, I can remove it and just assign the edge condition"? |
00:19 | < Rhamphoryncus> | What it's doing is storing a set (or interval) of possible values for a variable, but for math ops (like +) it rounds out to more interesting points |
00:20 | < Rhamphoryncus> | so if it sees an op that may produce a range of 1..10000 it expands that to 1..65536 |
00:21 | < Rhamphoryncus> | There's an infinite range of numbers but the interesting values are fixed, so it goes through them in constant time |
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05:23 | | * Reiver struggles to work out the best way to track what component counts were used in constructing his tuples. |
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08:01 | <~Reiver> How to you get the length of an array? |
08:01 | <~Reiver> In Java, rather. |
08:07 | <@McMartin> | a.length, I believe |
08:09 | <~Reiver> McMartin! Aha! |
08:10 | <~Reiver> You may be able to help me even better than that. You once threw a little, like, two-line snippet of code that parsed the command line arguements |
08:10 | <~Reiver> Unfortunately the pastie I stored it in appears lost forever unless I can retrieve the URL. I was trying to rehandcraft the thing myself and got stuck on trying to find the array length as the for-loop limiter. |
08:10 | <@McMartin> | for (int i = 0; i < args.length. ++i) { processFile(args[i]); } ? |
08:11 | <~Reiver> ... ok, so why did args.length not behave for me |
08:11 | <@McMartin> | full args stuff is beyond me at this hour |
08:11 | <~Reiver> That's what I had. Hrm. |
08:11 | <@McMartin> | Is main()'s argument named args? |
08:11 | <~Reiver> Yeah |
08:11 | <@McMartin> | public static void main(String[] args)? |
08:11 | <@McMartin> | Hm. |
08:11 | <@jerith> | Reiver: I think getopt is in Java's stdlib. |
08:12 | <@McMartin> | Yeah, there may be better ways now |
08:12 | <~Reiver> Oh wate |
08:12 | <~Reiver> Helps if I import Java.util doesn't it. >_> |
08:12 | <~Reiver> Sorry~ |
08:12 | <@jerith> | It's a crappy C-style method, but I'm pretty sure there isn't anything better without pulling in external libs. |
08:14 | <~Reiver> wait, what am I doing here. |
08:15 | <~Reiver> I have precisely two commandline instructions with a fixed order. |
08:15 | <~Reiver> I don't need a for loop at all, do I... |
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08:17 | <@jerith> | Quite. |
08:17 | <@jerith> | Although you'll want to validate them. |
08:18 | <@McMartin> | One nice thing about Java is that they start as Strings, which have a bunch of parser methods already handy. |
08:18 | <@jerith> | Quite. |
08:18 | <@jerith> | Although usually not the ones I actually want to use. |
08:18 | <@McMartin> | "file exists" or "is an integer" is typically what I end up with, personally |
08:19 | <~Reiver> So. Is it a bad idea to just go "filepath = args[0]; totalCost = args[1];"? What checks would I be sticking on that? |
08:19 | <@McMartin> | Make sure args.length is is exactly 2. |
08:19 | <@McMartin> | First. |
08:19 | <~Reiver> Yeah, that makes sense |
08:19 | <@jerith> | Reiver: Assert that the thing you're expecting to be an integer is an integer. |
08:19 | <@jerith> | Throw appropriate errors. |
08:19 | <@McMartin> | Or a Decimal, if Cost is a decimal thing. |
08:20 | <@McMartin> | Also assert the file is (if it's to be read) actually exists. |
08:20 | <@jerith> | For command line parsing, that ususally means printing to stdout and then exit(1) or whatever the Java equivalent is. |
08:20 | <@McMartin> | System.exit(1), I believe. |
08:20 | <~Reiver> Decimal is a Float, correct? |
08:20 | <@McMartin> | Or, if you're lazy, just don't catch the exception you throw |
08:21 | <@McMartin> | Well, there's a Decimal *class* that does binary-coded decimal and ensures that there's no floating point instability |
08:21 | <@McMartin> | If you're doing money, this is the best way to do it if you need decimality. |
08:21 | <~Reiver> hm, that's a good idea |
08:21 | <@McMartin> | (The cheap other way to do it is to use integers in the lowest denomination used) |
08:21 | | * Reiver hunts. |
08:21 | <@McMartin> | I know of BigDecimal, don't know if there's a SmallDecimal |
08:21 | <~Reiver> (Does it accept, eg, 72.50 as a valid number) |
08:22 | <~Reiver> Is BigDecimal preferable to Double? |
08:23 | <@McMartin> | You can't represent 1/100 exactly with a double |
08:24 | <@McMartin> | It'll *probably* be OK, for homework |
08:24 | <@McMartin> | But if you're doing something with serious business logic you should either do everything in terms of cents, or use BigDecimal everywhere |
08:30 | <~Reiver> hm |
08:30 | <~Reiver> BigDecimal seems clumsy to use |
08:32 | <~Reiver> Well, we'll see how I go. |
08:32 | | * Reiver ponders Java and it's myraid methods for loading files, tries to figure out which is the tastiest to use today. |
08:33 | <~Reiver> http://www.cs.waikato.ac.nz/~tcs/COMP317/Assignments/reliable3.dat - I want to be parsing each line as a new Device into an ArrayList<Device>. |
08:33 | <@jerith> | What are you wanting to read? |
08:33 | <@jerith> | Text or binary? |
08:33 | <~Reiver> Text |
08:34 | <@jerith> | Then you want the Reader/Writer stuff. |
08:34 | <@jerith> | They make text. |
08:34 | <@jerith> | InputStream/OutputStream operate on byte arrays. |
08:35 | <@jerith> | Translating between the two requires lots of boilerplate and, in some cases, use of an API that has been deprecated for over a decade but still has no replacement. |
08:35 | <~Reiver> right. |
08:35 | <@jerith> | </rant> |
08:35 | <@McMartin> | I really think we're going to globally standardize on UTF-8 before encoding APIs stabilize. |
08:36 | <@jerith> | McMartin: Sometime around the release of Ubuntu Zealous Zebra, perhaps? |
08:36 | <@jerith> | Or am I being optimistic? |
08:36 | <~Reiver> But what about UTF-16~ |
08:36 | <@McMartin> | UTF-16 can choke on a bag of phalli~ |
08:37 | <@McMartin> | That said, Windows already standardized on it for its OS API. >_< |
08:37 | <@jerith> | As always, Legacy is the killer. |
08:37 | <@McMartin> | Still better than the 20 or so encodings that OS X uses =( |
08:37 | <@jerith> | Because all your files are still Latin-69 or whatever Windows likes to use. |
08:37 | | * Reiver puzzles this. Been waaay too long since he's had to read crap in from a file as text. Fiddles. |
08:37 | <@McMartin> | Code Page blah blah blah |
08:38 | <@McMartin> | Modern Windows storage formats normalized on UTF-8 more or less, AIUI. |
08:38 | <@McMartin> | It's just the kernel that wants everything UTF-16. |
08:38 | <@jerith> | "Modern"? |
08:38 | <@McMartin> | "Windows 2000 or later" |
08:38 | <@jerith> | Ah. |
08:39 | <@McMartin> | Win9x used Code Page (4-digit something or other) |
08:39 | <@jerith> | Code Pages are mix'n'match because you only get 128 characters in each. |
08:39 | <@jerith> | And the default depends on your installation language. |
08:40 | <@McMartin> | Yeah. Boo for that. |
08:40 | <@McMartin> | And in UNIX you're evenly split between UTF-8 and Latin-1 for English-language stuff |
08:40 | <@McMartin> | Or "C" which is "wait, characters have eight bits? What is this rubbish?" |
08:40 | <@jerith> | Quite. |
08:42 | <@jerith> | Of course, Control as a modifier originally just suppressed bit 6 in the ASCII code or something. |
08:42 | <@jerith> | Or was it EBCDIC? |
08:42 | <@jerith> | And Meta just added bit 7. |
08:44 | <@jerith> | That's why ^B and ^C for mIRC colour codes pepper your services databases with 0x02 and 0x03, which are then rendered as the illegal(!) XML entities  and  |
08:45 | <@jerith> | Thus causing jerith a world of pain and a crapload of search/replace pre- and post-filtering in his script. |
08:46 | <@jerith> | Whoever added that little gem to the XML spec needs to die a fiery death of burnitude. :-/ |
08:46 | <@jerith> | </rant> |
08:48 | <~Reiver> hn |
08:48 | <~Reiver> Is there a constant or equivalent in Java string parsing for 'whitespace' |
08:48 | <~Reiver> Be it tab, space, whole string of spaces, etc? |
08:48 | <@jerith> | I don't think so, but I haven't looked at that stuff in ages. |
08:49 | <@jerith> | You could use regexen and "\s" if you need to, though. |
08:49 | | * jerith heads to the office, which is hopefully actually an office. |
08:50 | <@jerith> | Hrm. I should fire up IM and check that first. |
08:50 | <~Reiver> Other way of poking at it: I can use string[] args in commandline |
08:51 | <~Reiver> Wherein spaces denote 'next bit in the array' |
08:51 | <~Reiver> Nothing similar for filereading? |
08:58 | <~Reiver> hm. .lineToParse.split() seems to do half of it, we'll see if that's enough. |
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09:56 | <~Reiver> arg, fuck this noise |
09:57 | <~Reiver> BigDecimal is a leeging /pain/ to work with |
09:57 | <~Reiver> Why can't it behave like, I don't know, Float and Integer and Double and the rest ¬¬ |
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10:45 | <@TheWatcher> | That'd be too useful! |
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--- Log closed Tue Apr 20 11:25:53 2010 |
--- Log opened Tue Apr 20 11:26:22 2010 |
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17:29 | < celticminstrel> | I can't help wondering what idiot at Adobe decided it was a good idea to not support the Print Preview function on Mac. |
17:30 | < gnolam> | ... it's Adobe. |
17:30 | < celticminstrel> | I can understand them not supporting Print to PDF. But Print Preview is kind of essential. |
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18:36 | < PinkFreud> | because the pdf *is* the 'preview'? |
18:37 | < celticminstrel> | Maybe not, if you've entered text into fields. |
18:37 | < celticminstrel> | Which, incidentally, Preview.app doesn't support. |
18:37 | < PinkFreud> | heh |
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21:09 | <@McMartin> | Preview.app =( |
21:12 | < celticminstrel> | What's wrong? |
21:12 | <@McMartin> | Oh, it's just burned me several times in the past with its almost-PDF rendering. |
21:13 | < celticminstrel> | Any examples? |
21:13 | <@McMartin> | No easy ones; just the occasional horribly mangled document |
21:13 | < celticminstrel> | I see. |
21:14 | < celticminstrel> | So it's probably a good thing that I use Adobe Viewer usually? |
21:14 | | * McMartin shrugs. |
21:15 | <@McMartin> | When it fails, it's generally pretty obvious |
21:22 | < gnolam> | Hmm. |
21:22 | | * gnolam has apparently lost his Project Euler login. |
21:23 | <@jerith> | Heh. One our our vendor API documents only renders in Adobe Reader. |
21:24 | <@jerith> | Preview and whichever other one I tried both render the monospaced bits as random compositions of black-to-white gradients. |
21:24 | <@McMartin> | On the subject of PDF readers to not use, Sumatra PDF is amazingly terrible. |
21:32 | < gnolam> | It does tend to crap out on a lot of documents, yes. |
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21:34 | < gnolam> | But it's not Acrobat. :P |
21:37 | <@McMartin> | It also jams printers |
21:37 | <@McMartin> | Because, ANAICT, it renders each pixel as a square of PostScript |
21:37 | <@McMartin> | I've had 300KB PDFs turn into dozens of gigabyte-sized print jobs when printed through Sumatra |
21:40 | < gnolam> | Hah. |
21:40 | < gnolam> | Never tried printing through it. |
21:41 | < gnolam> | http://www.google.com/governmentrequests/ |
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21:45 | <@McMartin> | gnolam: Yeah, uh, don't~ |
21:45 | <@McMartin> | It's vaguely OK as a viewer, but if you're trying to avoid Adobe, FoxIt is free too. |
21:47 | < gnolam> | Unfortunately, I have a policy against programs that attempt to advertise in their very title. :P |
21:51 | <@McMartin> | Heh |
21:51 | <@McMartin> | Hm. Actually. Can't gsview be put into a PDF-reading mode? |
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22:48 | <@ToxicFrog> | ...how is "foxit" advertising? |
22:49 | <@jerith> | 48% of Firefox? |
22:50 | < Namegduf> | Just Foxit. |
22:50 | < Namegduf> | Their domain is "Foxit Software" and they describe it as "Foxit Reader" |
22:50 | < Namegduf> | And other PDF software. |
22:51 | < Namegduf> | So I don't know if I'd read it as "That's Firefox-related" |
22:52 | < gnolam> | It insists on not calling itself "Foxit" or "Foxit Reader", but "Foxit Reader, the best bla bla bla wharrgarbl!"+ |
22:52 | < Namegduf> | Ah, I see. |
22:56 | <@ToxicFrog> | ...actually, no, it just calls itself "Foxit Reader" |
22:56 | < gnolam> | Not the last time I used it. |
22:56 | < Namegduf> | Maybe they fixed it. |
22:56 | < Namegduf> | This is why bugtrackers are better than support. |
22:56 | < Namegduf> | You can file things like that which are clearly misfeatures as bugs. |
22:56 | < gnolam> | It might be a small annoyance, but "Open with ... Foxit Reader, the best bla bla bla wharrgarbl!" instead of just "Open with... Foxit" is still fscking annoying. |
22:57 | <@ToxicFrog> | I mean, it might say that somewhere on the website, which would put it in common with every piece of software released in the past 15 years |
22:57 | < gnolam> | I'm talking about the program itself. |
22:57 | < gnolam> | I don't care about the website. |
22:57 | < gnolam> | I used the goddamned thing for three years or so, and that was one thing that stayed constant between versions. :P |
22:57 | <@ToxicFrog> | But I've been using it since 2006 or so and have yet to observe this. |
22:58 | <@jerith> | Maybe only the Swedish version does it? :-P |
22:58 | <@ToxicFrog> | Not in the title bar, not in the start menu entries, not in the install path, the right-click entry is just "Open"... |
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23:02 | | * gnolam does not care for shitty translations with made-up words (Microsoft and Nvidia were the worst offenders with that) and therefore uses English-language OSs and programs. |
23:03 | <@McMartin> | What's the best is when they translate the APIs too making various programs randomly suddenly not binary compatible. =( |
23:04 | < Namegduf> | Haha |
23:04 | <@McMartin> | (We've been burned by that a couple of times at my workplace; MS officially blames us since there are ways to have this not happen) |
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23:07 | < gnolam> | ... translate the APIs? |
23:09 | <@McMartin> | System support programs sometimes have their names translated, and sometimes don't. |
23:09 | <@McMartin> | So if you ever shell out or use rundll32, the files might not be there under the names you expect. |
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--- Log closed Wed Apr 21 00:00:11 2010 |