| --- Log opened Sat Feb 20 00:00:56 2010 |
| 00:11 | < ToxicFrog> | What is this bullshit, VHDL? |
| 00:11 | < ToxicFrog> | So, consider the following: |
| 00:11 | < ToxicFrog> | entity foo_bar is |
| 00:11 | < ToxicFrog> | -- interface definition goes here |
| 00:11 | < ToxicFrog> | end foo; -- note that this doesn't match foo_bar |
| 00:11 | < ToxicFrog> | What sort of error would you expect from this? |
| 00:11 | <@Derakon> | Unexpected semicolon on line 3. |
| 00:11 | <@Derakon> | >.> |
| 00:13 | < ToxicFrog> | What you actually get is that once you start writing the implementation, it will complain that some (but not all) of the symbols used in that implementation are undeclared. |
| 00:14 | | AnnoDomini [annodomini@Nightstar-d4aaede7.adsl.tpnet.pl] has quit [[NS] Quit: Blergh.] |
| 00:15 | <@Derakon> | Logic! Can has. |
| 00:31 | < ToxicFrog> | And now the fucking simulator is randomly failing! |
| 00:31 | <@Derakon> | Dose it with Viagra. |
| 00:47 | | Attilla [Attilla@FBC920.0A905B.96DC0B.81511F] has quit [[NS] Quit: ] |
| 00:48 | < gnolam> | ToxicFrog: just wait til you get to the /really/ fun parts, where your VHDL synthesizer decides to silently optimize away vital portions of your design. |
| 00:49 | < McMartin> | God, synthesizers |
| 00:50 | < ToxicFrog> | gnolam: I've already had that happen today! |
| 00:50 | < ToxicFrog> | Although it's kind of hard to tell when that happens now because the simulator isn't working! |
| 00:50 | < ToxicFrog> | Oh yeah, here's the error it gives: |
| 00:50 | < ToxicFrog> | "Update TBW failed." |
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| 02:41 | | * McMartin stabs VMware Player in the face |
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| 13:21 | <@Vornicus-Latens> | Hm. Reducing the number of comparisons made doesn't seem to have helped much. |
| 13:28 | | * Vornicus-Latens defers creation of the subset sum cache to /after/ the greater check (of which there is only one), makes the program fast. |
| 13:30 | <@Vornicus-Latens> | (6-fold increase in performance!) |
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| 15:30 | | * Vornicus-Latens totally stomplifies Euler 104 the second time around, using a logarithmic approximation to check the first 9 digits of the really, really large (80,000 digit) number in question. |
| 15:30 | <@Vornicus-Latens> | 4 seconds is good. |
| 15:33 | <@Vornicus-Latens> | well. 70,000 digits. |
| 15:53 | <@Vornicus-Latens> | (indeed, more than half the time is spent figuring the /actual/ value, to make sure that it's right - the approximation can be off by 1, so I have to check anything i find.) |
| 16:03 | < Alek> | hrm. |
| 16:03 | < Alek> | can anyone help? |
| 16:04 | < Alek> | just what exactly is involved in the installation of cable internet? besides the cable laying? |
| 16:04 | < Tarinaky> | Gutted. I was just about to make a joke that nobody could help given the level of detail you'd provided on your problem :p |
| 16:05 | | Derakon[AFK] is now known as Derakon |
| 16:09 | <@Vornicus-Latens> | Alek: various things like "telling the ISP's routers that you can receive internet" and "configuring the modem" |
| 16:39 | < Alek> | mmh. |
| 16:39 | < Alek> | in other words, things a power user can comfortably do without the services of a trained installer. |
| 16:39 | < Alek> | thanks. |
| 16:39 | < Alek> | you just saved my dad $50. >_> |
| 16:41 | <@Vornicus-Latens> | Um. |
| 16:41 | < Alek> | yeeees? |
| 16:41 | <@Vornicus-Latens> | THe modem configuration and ISP router bit is essentially impossible to do without an installer guy, because they know the configuration of the network. |
| 16:42 | < ToxicFrog> | Vorn: any reputable ISP will tell you that info when you sign up, though |
| 16:42 | <@Vornicus-Latens> | Point. |
| 16:43 | < ToxicFrog> | So you just need to know how to get at the modem's configuration interface. |
| 16:48 | < Alek> | yep. |
| 16:48 | < Alek> | and since we're buying the modem ourselves, it should have a manual. >_> |
| 16:48 | <@Vornicus-Latens> | Works for me. |
| 16:48 | < Alek> | I just hope it's accessible THROUGH the router. |
| 16:49 | < Alek> | since the current DSL modem isn't. >_< |
| 16:49 | < ToxicFrog> | It's very often the case that it isn't; you need to directly connect it to a computer. |
| 16:49 | < Alek> | bah. |
| 16:49 | < Alek> | bah I sez. |
| 16:49 | < Alek> | well, we can connect to PC to configure, then switch it to behind the router. |
| 16:50 | < ToxicFrog> | (often it depends on the modem - if it's in route mode you can access it through a router, but you shouldn't, because the modem itself acts as a router; if it's in bridge mode you need a direct connection) |
| 16:50 | < Alek> | well, the one we're looking at is network-ready but not a router, since it only has the one jack. |
| 16:51 | < Alek> | up to 63 PCs it sez |
| 16:51 | < Alek> | I'll look in the manual for route mode >_> |
| 16:57 | < ToxicFrog> | ...that doesn't mean it's not a router, just that it's not a switch. |
| 16:57 | < ToxicFrog> | My DSL modem has one jack and can operate in both route and bridge mode. |
| 16:58 | < ToxicFrog> | Route mode is for when you plug a single computer directly into it; bridge mode is for when you have a seperate router behind it. |
| 17:02 | | * Vornicus-Latens bonklifies Euler 105. What's wrong now? |
| 17:06 | <@Vornicus-Latens> | ...forgot that slices don't include the top index. |
| 17:06 | | You're now known as TheWatcher |
| 17:16 | | * Vornicus-Latens now pokes 106. Okay, what'd I do now. |
| 17:19 | | * Vornicus-Latens decides he needs somebody to confirm his calculations for this one, because he doesn't see anything wrong. |
| 17:27 | | * jerith could take a look. |
| 17:27 | < jerith> | I haven't solved that one myself, though. |
| 17:28 | < jerith> | I stopped at 100. |
| 17:28 | <@Vornicus-Latens> | I'm looking at #106; My algorithm gives correct values for 4 and 7 (the two samples given) but not for 12 (the actual question) |
| 17:31 | <@Vornicus-Latens> | And so what I wanted to do was see if I could get someone else to give me their values for 4-10 to see if my algorithm got those right and in which direction. |
| 17:31 | <@Vornicus-Latens> | s/and in/and (if wrong) in/ |
| 17:35 | < jerith> | Do you have to find the set first? |
| 17:37 | <@Vornicus-Latens> | Well, given /a/ set, the question is what disjoint subset pairs do I have to try comparing. |
| 17:37 | < jerith> | Ah, I see. I've just reread the problem more carefully. |
| 17:38 | <@Vornicus-Latens> | For a set like 3 5 6 7, I don't have to compare 3 6 to 5 7, because obviously the first in one is lower than the first in the other, the second in one is lower than the second in the other, etc. |
| 17:38 | | * jerith nods. |
| 17:39 | <@Vornicus-Latens> | I /do/ have to try 3 7 and 5 6 (which in this case are unequal) because there's one that's higher and one that's lower. |
| 17:40 | <@Vornicus-Latens> | So far that's the only filter I can see - and that filter alone gives the correct values for size = 4 and size = 7. |
| 17:44 | < jerith> | Ah, the subsets don't need to contain all the elements in the set between them. |
| 17:44 | <@Vornicus-Latens> | Right. |
| 17:44 | < jerith> | That's why I wasn't getting the right totoal number. |
| 17:46 | < jerith> | Is there a useful Python library for making the pairs of sets? |
| 17:49 | <@Vornicus-Latens> | Not really; I made my own using a bitfiddling technique. |
| 18:03 | <@Vornicus-Latens> | Hm. Searching the web, I don't see any other things I missed. |
| 18:07 | < jerith> | Okay, I can generate the piars of sets now, and I'm getting the right number of those. |
| 18:08 | < jerith> | Slow, but not /too/ slow. |
| 18:08 | < jerith> | Hrm, should we take this to #projecteuler perhaps? |
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| 19:40 | | * Vornicus-Latens completes Euler 107, which is a walk in the park followed by a nap. |
| 19:40 | | Vornicus-Latens is now known as Vornicus |
| 19:40 | | * Vornicus has been here for 6 hours, it must be time to change his nick. |
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| 20:23 | <@Attilla> | Not quite so... latent? I always wondered what "Latens" means except... away? |
| 20:25 | <@Vornicus> | It is the root for "latent" |
| 20:25 | <@Vornicus> | Which means hidden / under the surface / lurking |
| 20:25 | <@Attilla> | Ah. I thought so. |
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| --- Log closed Sun Feb 21 00:00:57 2010 |