00:02:14 abbaJ has joined #openacs 00:44:18 any of you guys know anything about algorithm efficiency? 00:45:49 somewhat 00:45:56 * markd2 is an O(n^2) algorithm 00:46:03 heh 00:46:11 I think I know the solution 00:46:18 I can't express it in words or code though 00:46:36 The problem is as follows: 00:47:00 We have 2 nested for loops and inside each we do an algebratic computation 00:47:34 The outer loop runs n-k times and the inner loop runs (n-k)(k-1) times 00:47:59 For a total of (n-k)(k-1)+(n-k) arithmetic operations 00:48:26 It helps to make some graphs to identify the O() of the algorithm 00:48:48 the complexity is n^2 00:48:59 2 nested for loops 00:49:09 The questions that are asked: 00:49:18 1. What is the total number of algebratic operations 00:49:23 that's done already 00:50:23 2. How can we make it compute faster 00:50:27 and 00:50:38 3. How many arithmetic operations does the optimized program do 00:50:54 I think the code does this 00:50:59 say you have an array of 50 00:51:13 it will compute an average on the elements 1-10 00:51:27 next iteration it will compute the average on elements 2-11 00:51:29 then 3-12 00:51:31 ...etc 00:51:46 * markd2 catches up 00:52:17 I think the way to optimize this is to keep the center the same and only mess around with the edges taking away from one, and adding to the end 00:53:00 then recomputing the average 00:53:12 what's the program actually do? 00:53:22 this should eliminate the inner loop for recalculating the sum 00:53:33 input a[0..n-1]; 00:53:33 input k; 00:53:34 declare s; 00:53:34 declare ave[0..n-k]; 00:53:34 for i := 0 to n-k do { 00:53:34 s := 0; 00:53:36 for j := i to i+k-1 do 00:53:40 ave[i] := s/k; 00:53:42 } 00:53:44 output ave[0..n-k]; 00:53:55 after the second for loop: 00:54:00 s := s+a[j]; 00:54:08 Nickserv ate my program 00:54:27 davb has joined #openacs 00:54:29 I was able to solve this problem last semester 00:54:32 wb dave 00:54:46 ack 00:54:50 syn! 00:54:57 Hi, whats an easy way to see if my DNS is getting out to the internet? 00:54:58 :-/ 00:55:06 hmm? 00:55:08 try nslookup 00:55:15 oh your DNS? 00:55:24 Yeah. 00:55:35 I want to see if the firwalll or my ISP is blocking it. 00:55:37 ask someone else nicely too look it up :-) 00:55:41 tell a computer to use only the DNS box as it's DNS server and try going to www.google.com 00:55:56 Right. 00:56:05 If you can resolve google.com then it works 00:56:23 Mark, does my solution make sense? 00:56:33 I don't know how to do it in code 00:57:11 I can reduce the complexity to be linear 00:59:06 it's too contrived for my brain to handle right now 00:59:13 ok 00:59:16 * markd2 gets brain tired after 5pm 00:59:37 heh 00:59:41 I get brain tired after 2 01:23:22 weird, I can PING www.deepskydesign.com but my browser never goes there. 01:24:05 never mind, I am dubm. 01:24:11 heh 01:24:47 is DNS port 53? 01:30:49 nm 01:36:55 argh,argharghargharghargharhgarhg 01:37:19 yeah. what he said 01:38:33 My web server works by IP address, but not name. not sure why. 01:39:10 aha, perhaps resolv.conf is screwing it up (i hope) 01:39:45 hmmm didn;t help 01:52:18 marks2 I assume you did not connect to my server? 01:52:26 s/marks2/markd2 01:52:28 :) 01:53:20 I couldn't get t it 01:53:38 there it ges 01:53:43 (at least it contacted) 01:53:52 nothing's come back yet 01:53:56 Yeah. I a, not sure what is up. 01:54:11 If I type www.deepskydesign.com:8080 it works. 01:54:25 I think its a local screwiness on the server. 01:54:42 this the BadNicBox> 01:56:42 well, not anymore. 01:57:20 It was a wacky ISP issue, so I moved it. I think I am just going to move the other DNS box over here and be out of service for 24-48 hours instead of trying to duplicate it. 01:57:35 Although the mail is working great :) 01:57:54 rockin' 01:59:22 I think the main problem is that I have no idea what I am doing. 02:01:01 we learn by doing 02:01:13 that which doesn't kill me makes me weirder^H^H^H^H^H^H stronger 02:02:16 ok, now I am in a bad mood, but happy 02:02:22 www.deepskydesign.com works now 02:02:27 for no reason. 02:02:36 I restarted the master nsvhr AOLserver. 02:02:55 wow. this is the first time I've actually seen deepskydesign before :-) 02:03:04 its nothing special :) 02:03:15 actually it kinda sucks, but I am too lazy to fool around with it. 02:04:02 strangley the other one is still not working. I even restarted the virtual aolserver also. 02:04:06 Well I am halfway there, 02:05:16 ok, who's using port 8000.... 02:05:54 I probably installed something when I did that big apt-get upgrade that is running on 8000 02:22:05 weird. I had some rougue nsd threads that would not die. accoring to netstat the google indexer connected and never closed. weird. 02:23:31 NOW! to battle network solutions! 02:26:04 hi 02:26:18 howdy! 02:26:24 :) 02:26:28 I'm upset 02:26:29 holy shit. 02:26:31 me too! 02:26:38 I should have done so much better on that databases test 02:26:54 dems da breaks 02:26:58 network solutions says my domain name if for SALE when I checked my registar and its registers until next year. 02:27:06 heh 02:27:12 I should check mine too 02:27:40 they are evil (netsol) 02:27:48 heh 02:28:07 ->8000 server1.thedesigne:1306 CLOSE_WAIT 02:28:07 tcp 211 0 server1.thedesigne:8000 server1.thedesigne:1304 CLOSE_WAIT 02:28:07 tcp 444 0 server1.thedesigne:8000 alb-66-24-206-3.ny:1930 CLOSE 02:28:07 tcp 453 0 server1.thedesigne:8000 alb-66-24-206-3.ny:1929 ESTABLISH 02:28:09 oops 02:28:15 ->Cookie Data in IE Can Be Exposed or Altered 02:28:16 Through Script Injection 02:28:33 I hate when that happens... look out for those cookies markd2 02:28:42 what domain? 02:28:46 * markd2 cheks his cookies 02:28:48 deepskydesign.com 02:28:59 where do you see it being on sale? 02:29:18 I did a whois at networksolutions.com they said "this domain is available for registration" 02:29:39 you better check again 02:29:53 now it says ERROR out server sucks...please try again later 02:30:00 You probably suffer from the "fat fingers" syndrome 02:30:07 no i READ it 02:30:14 deepskydesign.com 02:30:15 Back-Order deepskydesign.com NOW! 02:30:26 * Psychephylax thwaps© Dave 02:30:35 Cookie Data in IE Can Be Exposed or Altered 02:30:35 Through Script Injection 02:30:38 arhg!! 02:30:45 If you would like to register this Web Address(domain name), 02:30:45 click Register Now below. 02:30:45 deepskydesign.com 02:31:12 I did a whois at buydomains.com and they said its not available. I have had it for like 2 years. 02:31:45 ok, I'm at the front page 02:31:46 now what 02:33:12 aha. 02:33:22 apparently their WHOIS database is not updated or something. 02:33:53 talli has joined #openacs 02:34:03 hey guys 02:34:07 I think its really a scam. You put in your domain and it always says, OH NO your domain is avaialble. You better give us $75 right away so you don't lose it. Imagine how many MS users they could catch that way. 02:34:09 Hi talli! 02:34:12 hi talli 02:34:47 I just wnated to see what email address they had for my contact name. I have tried like 1000 times to update it. 02:34:48 hazmat has quit 02:35:07 Aha! 02:35:11 they are dumb 02:35:15 and annoying 02:35:35 My personal handle is updated, but my domain info is not. 02:36:46 Beer mixes not well milk with 02:37:35 uh....yeah! 02:39:55 wth 02:39:59 Why won't this run 02:40:11 I injected the script with cookie data 02:40:16 the trrricorders must be brroken 02:40:27 mmm.. cookie data ice cream... 02:40:29 shouldn't that be tttrrriiicorders? 02:40:45 they put crrreeaturres in our boodies 02:41:07 * Psychephylax misses the jokes 02:42:12 Aha 02:42:13 it works 02:43:21 jerryasher has joined #openacs 02:43:35 Hi jerryasher!! 02:43:41 Hey Dave! 02:46:00 * davb files the "Yahoo Store" folder next to the ark... 02:46:37 ah69he seeh tye commerical for AT&T Wireless web with monkies using AOL Instant Messenger? 02:46:45 Hey Jerry 02:47:04 Hi psychesporkie 02:47:53 Sporkiephylax! :) 02:49:48 Did anyone see 24? 02:51:11 no 02:51:33 * markd2 stopped counting sheep at 23 02:53:46 markd2 has quit 02:54:05 oh 02:54:16 Jerry, you might know this since you've done lots of AOLServer stuff 02:54:31 have you ever seen something like this: 02:54:47 I have a query that i know is correct because I get what I want in SQLPlus 02:55:16 And I have a page that works (IF i use the simpler query) 02:55:34 However, the moment I replace the query the ADP page shows nothing (but does not crash) 02:56:09 turn verbose on in your db pool and check the log 02:56:39 verbose is on 02:57:23 Does the query show in the log? 02:58:44 arg 02:59:00 Do you mean arg, or "Aargghhhh!" 02:59:08 the latter one 03:01:15 How the hell 03:02:12 can't read "incident_id(cm_trans_pwr)": no such element in array 03:02:36 aha 03:03:37 Ok 03:03:39 this is scaring me 03:03:47 I was dumbfounded by this error 2 days ago 03:03:51 Now, it works 03:04:31 Who says thinking drunk is bad! 03:04:39 I gotta code with beer more often 03:05:54 Psychephylax: apparently I broke netsol's WHOIS system. 03:06:10 I'd say that's worth your 35$ 03:07:09 heh 03:08:18 argharghargharghargharghargharghargharghargharghargh 03:08:33 I think I must recompile ns_xml 03:09:25 GEM has joined #openacs 03:11:20 I can't build ns_xml for some reason all the header files are missing. 03:12:33 chump has quit 03:12:39 hey! 03:12:55 chump has joined #openacs 03:12:57 yeh? 03:12:59 ? 03:13:08 he's back. 03:14:44 weeeeird 03:15:16 I'm getting 3 rows in an adp page for every one in the database 03:17:17 arhgarhgargh. 03:17:41 OK. make cannot find my include files foo.h etc... 03:17:54 but they are all in /usr/include/... 03:19:59 Aha 03:20:03 it's my query that's messed 03:22:11 does ldconfig fix the path for include files also? 03:22:44 dang, Oracle Brain Mark left 03:24:25 talli has quit 03:24:58 moo 03:25:03 hi rbm 03:25:07 hey davb 03:25:16 any luck with those CDs? 03:25:38 Aha! 03:25:49 it's iterating on one table too much 03:26:07 heh, I am working on them tonight. halfway done :) 03:26:43 davb: Thanks! :) 03:27:12 np. I am sorry that the second half of lecture #5 is not there. My CD is damaged. 03:27:15 :( 03:30:05 davb: Oh. Can we download it again? 03:30:08 hey, i forgot, I can install the new 16x recorder and be done twice as fast! 03:30:18 I can't find out where. They don't have them on aduni.org 03:30:26 aegrumet has joined #openacs 03:30:52 wooohooo 03:30:53 I fixed it 03:31:45 hi aegrumet 03:31:48 Psychephylax YEAH! 03:31:51 yeah! 03:31:52 hehe 03:32:00 db_multirow gets a bunch of rows 03:32:06 how do I get one value? 03:32:16 is it db_1row? 03:32:19 or 1value? 03:32:24 hey davb 03:32:30 db_null works too. 03:32:46 Well, I plan on counting rows 03:32:50 Do you want to just get one at a time, or throw out the rest of the results? 03:33:44 I need to do a select count(*) from snmp_incidents where modem_mac = '...' AND incident_date (within last week) 03:33:49 and store that in a variable 03:34:05 basically, count how many queries there were in the last week 03:34:19 db_string 03:35:04 * Psychephylax tries 03:36:02 damn 03:36:07 I love Bloomberg already 03:36:16 db_string is the one. It returns the value of the first column. 03:36:20 returned 03:36:24 He's taking a 1$ a year salary and he's not moving into Gracy Mansion 03:36:31 Nifty. 03:36:47 yeah 03:36:58 rbm: i emailed the webmaster at aduni.org to find out if they still have them. 03:37:07 davb: Great. 03:37:24 davb: I'm planning on forming a group of study here that will gather to watch those presentations and work through the book. 03:37:46 question 03:37:48 when they say this: 03:37:57 db_string statement_name sql [ args... ] 03:38:01 is it something like this: 03:38:09 db_string blah {sql goes here} 03:38:15 or db_string blah "sql goes here" 03:38:43 either one is OK. 03:38:46 ok 03:40:00 so does anyone have an idea why make can't find my libxml2? 03:40:35 Psychephylax: Either is Ok. I personally like { } better 03:40:36 LD_LIBRARY_PATH might help 03:40:48 hmm 03:40:53 * AaronSw reconnects 03:40:54 thanks 03:40:57 I did this: 03:40:59 db_string runs_this_week {select count(*) from snmp_incidents} 03:41:14 and in -properties I have runs_this_week:onevalue 03:41:19 ln -s /usr/inlcude/libxml2/libxml /usr/include/libxml did the trick :) 03:41:27 then when I tried @runs_this_week@ it bombed out: 03:41:34 can't read "runs_this_week": no such variable 03:41:45 do this: set runs_this_week [db_string blah] 03:41:47 What stupid mistake did I make this time around 03:41:51 ah 03:42:00 you are getting to fancy :) 03:42:22 heh 03:42:24 ok 03:42:28 how about this one 03:42:37 since I'm not good with the date type yet 03:42:52 how do I tell it to only get the dates that are only sysdate - 7 days 03:43:33 date math in postgresql.... 03:43:42 is not the same as in oracle? 03:44:24 dates are integers in Oracle (and PG IIRC). You just subtract them. 03:44:41 I happened to run across an age() function last night 03:45:17 SQL> select sysdate from dual; 03:45:17 SYSDATE 03:45:17 ---------- 03:45:17 2001-11-08 03:45:17 SQL> select sysdate+7 from dual; 03:45:18 SYSDATE+7 03:45:20 ---------- 03:45:22 2001-11-15 03:46:32 Kewl 03:46:52 set runs_this_week [db_string runs_this_week {select count(*) from snmp_incidents where incident_date > sysdate - 7}] 03:47:04 jerryasher has quit 03:51:42 My code is horrible 03:51:51 As a programmer I am disappointed at myself 03:53:36 argargargargargargargargargargargargargargargar 03:54:27 * rbm does CPR on davb (with a tube) 03:54:32 screw it, i'll fix it tomorrow 03:54:34 rbm: thanks! 03:54:42 CLEAR! 03:55:05 heh 03:55:37 well I'll see you all later. 03:58:24 later 03:58:31 davb has quit 04:00:58 How can I tell Emacs to actually insert a TAB when I hit TAB? 04:04:35 umm 04:04:47 if you hit back...and it jumps like 8 "spaces" then it inserted a tab 04:04:58 else it's just spaces that look like tabs 04:05:47 k 04:05:55 I am very lost 04:06:26 I have a total of 72 queries 04:06:55 I check how many have been run within the last week...62 04:07:01 (btw, this is in SQL plus) 04:07:34 Now, I use the same queries in my tcl page 04:07:39 And it's missing rows 04:07:56 ooooh 04:08:07 I think I remember 04:11:54 fixed 04:19:52 Why do you want tab characters? 04:20:11 Because I do. 04:20:55 lol 04:20:56 I got around with M-x indent-relative, but that's poor. 04:21:18 how about C-Q TAB? 04:21:21 Roberto, I think we're just misunderstood 04:21:29 "Why do you want it?" 04:21:38 "Because I just do" 04:21:39 I'm doing Tcl, and I'm opening a " in one line, with the string on the next line, and I want to indent it according to where it's at 04:21:49 Why is that so hard to understand? 04:22:16 hey, ROberto - did I see that davb is making CDs of the ADUni lectures? 04:23:05 C-Q Tab seems to work. But I still think Emacs should not try to think it's smarter than me and just do what I'm telling it to. 04:23:17 GEM: yes. 04:23:17 Label GEM not found. 04:23:20 indent-tabs-mode 04:23:20 well, what mode are you in? 04:23:25 Tcl mode 04:23:27 set it to something non-nil 04:23:36 M-x apropos indent-tabs-mode 04:23:51 Yup, that was what I was getting to - you can tell it to do something less special with a tab character 04:23:55 But then when I ret RET, will is still indend? 04:24:03 dunno 04:24:35 Hmm. I'd love to ge access to those ADUni disks at some point 04:24:45 Another thing I need to find out is how to tell emacs to _just_ use tabs for indenting, instead of tabs+spaces 04:25:50 M-X apropos will tell you lots of handy things 04:26:10 I tried it. It gives me a zillion things. 04:27:26 yup 04:30:49 bah 04:32:12 aegrumet has left #openacs 04:44:11 Roberto, you still here? 04:44:41 yeah 04:44:58 Hey, how do I tell ad_page_contract that I only allow certain values in a passed var? 04:44:59 Is there a way to tell SSH to log out idle terminals? 04:45:10 Psychephylax: Hmmm. I think so. 04:45:20 ummm...I think you have to make a check on the bound variable 05:17:15 djg has joined #openacs 06:31:48 GEM has quit 06:31:49 GEM has joined #openacs 09:31:58 abbaJ has quit 09:39:57 abbaJ has joined #openacs 11:28:12 abbaJ has quit 11:33:10 abbaJ has joined #openacs 12:35:21 markd2 has joined #openacs 13:42:46 markd2 has quit 13:54:29 davb has joined #openacs 14:09:40 talli has joined #openacs 14:09:50 hey guys 14:10:30 Hi talli. 14:48:55 Psychephylax has quit 14:48:55 talli has quit 14:48:55 rbm has quit 14:48:55 AaronSw has quit 14:48:55 shagster has quit 14:48:55 davb has quit 14:49:07 Psychephylax has joined #openacs 14:49:07 talli has joined #openacs 14:49:11