| --- Log opened Wed Apr 06 00:00:18 2011 |
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| --- Log closed Wed Apr 06 02:36:07 2011 |
| --- Log opened Wed Apr 06 02:36:19 2011 |
| 02:36 | | TheWatcher[zZzZ] [chris@Nightstar-b4529b0c.zen.co.uk] has joined #code |
| 02:36 | | Irssi: #code: Total of 24 nicks [4 ops, 0 halfops, 0 voices, 20 normal] |
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| 03:11 | < ToxicFrog> | This is...what |
| 03:11 | < ToxicFrog> | QUESTION: how many 1Kx8 RAM chips are needed to provide a total capacity of 4096 bytes? |
| 03:11 | < ToxicFrog> | Correct answer: 4 |
| 03:11 | < ToxicFrog> | Answer provided: 4681 |
| 03:12 | < Tamber> | -blinks- |
| 03:12 | < Tamber> | Lots and lots of redundancy? |
| 03:13 | < ToxicFrog> | He appears to have missed the 'K' in '1Kx8' and then gotten another 585 from somewhere |
| --- Log closed Wed Apr 06 03:21:04 2011 |
| --- Log opened Wed Apr 06 03:32:42 2011 |
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| 07:18 | < Vornicus> | Seen in another channel just now: do { ... } while (0) |
| 07:18 | < Tamber> | Even better than that. |
| 07:18 | < Tamber> | do { if(a_dbg_level >= a_dbg_level){ printk("<" #a_dbg_level ">" MODULE_NAME ": " format, ## arg); } while (0) |
| 07:19 | < Tamber> | if you can't assume a variable is at least equal to itself, printk is probably not gonna help you; the entire thing is so insane that it's about on fire and nobody will ever see the debug message. :p |
| 07:20 | < Vornicus> | No, it looks like you'll see the debug message anyway |
| 07:20 | < Tamber> | I know. |
| 07:20 | < Tamber> | It does work, it's just mad. |
| 07:22 | < Vornicus> | what is that language anyway? |
| 07:22 | < Tamber> | C. |
| 07:22 | < Vornicus> | aha |
| 07:22 | < Vornicus> | man, preprocessor shit. |
| 07:23 | < Tamber> | There's a lot of it in things that have to deal with the kernel, it seems. :) |
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| 07:48 | < Rhamphoryncus> | do { ... } while (0) is actually a common trick in C |
| 07:49 | < Rhamphoryncus> | it's used in macros so you can call them as FOO(); and have the semicolon work right |
| 07:49 | < Tamber> | ...huh. |
| 07:49 | < Vornicus> | ...huh? |
| 07:55 | < Rhamphoryncus> | that protects against cases where you have if (...) FOO(); else BAR(); |
| 08:00 | < Rhamphoryncus> | anyway, I need some sleep, so if you're still curious you'll have to google it ;) |
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| 11:15 | < gnolaptop> | "Software development == church development. Step 1: Build it. Step 2: Pray." |
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| 17:51 | < SchoolPhox> | So, what's the deal with global variables in C? Are they something that should be avoided when possible? |
| 17:52 | < SchoolPhox> | I'm in a situation where I can either use a global variable, or I can calculate the value. Which is preferred? |
| 17:53 | < Tamber> | I would think it depends on how expensive the calculation is, and how it affects how easily one can understand the code when you come back to it later. |
| 17:54 | < ToxicFrog> | As is generally the case, they are something that should be used sparingly and with caution. |
| 17:54 | < ToxicFrog> | For this case in particular, is there a reason you can't use a file local variable? |
| 17:55 | < SchoolPhox> | It's two separate functions that don't call each other. |
| 17:56 | < Kindamoody> | If it's in two places, I'd use a global. |
| 17:58 | < Kindamoody> | I once made the mistake of comparing two strings that should have been constants, and I mistyped one of them, so they were not equal even though they should have been. |
| 17:58 | < ToxicFrog> | SchoolPhox: are the functions in the same file? Use a file static rather than a global, then. |
| 17:58 | < SchoolPhox> | Ooh, that's a good idea |
| 17:59 | < SchoolPhox> | Think I'll go with that one |
| 17:59 | < ToxicFrog> | Um |
| 17:59 | < ToxicFrog> | Kindamoody: as in, you were comparing two string literals? |
| 17:59 | < ToxicFrog> | That should have been the same? |
| 17:59 | < ToxicFrog> | Can't you just replace the entire expression with 'true' in that case? |
| 18:00 | < Kindamoody> | I set two strings to compare, and both were set in two different places. |
| 18:01 | < Kindamoody> | On one of them, I added a colon at the end of the strings. |
| 18:01 | < Kindamoody> | By mistake. |
| 18:02 | < Kindamoody> | Like, Name1 and Name2 in one place, and Name1: and Name2: in the other. |
| 18:02 | < Kindamoody> | So, Name1 was not equal to Name1: of course. |
| 18:02 | < Kindamoody> | Cost me about $300. |
| 18:05 | < celticminstrel> | ? |
| 18:05 | < celticminstrel> | How? |
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| 19:21 | < Kindamoody> | Sorry, I didn't follow up what I said... I had to take $300 off the bill to make the client happy. |
| 19:33 | < ToxicFrog> | Hmm. |
| 19:34 | < ToxicFrog> | My sIPD algorithm thinks that (4,1) is adjacent to (1,3). |
| 19:35 | < Vornucopia> | sIPD? |
| 19:44 | < ToxicFrog> | Spatial Iterated Prisoner's Dilemma. |
| 19:54 | < ToxicFrog> | Basically, cellular automata with N cell states, where each state corresponds to an IPD strategy. |
| 19:54 | < ToxicFrog> | Each tick, each cell IPDs with all of its neighbors, and copies itself into all adjacent weaker cells. |
| 19:54 | < Vornucopia> | Yeah, I found some. |
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| --- Log closed Thu Apr 07 00:00:32 2011 |