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• Perl, efficient parsing of csv file

  - by Mike

  I'm working on a project that involves parsing a large csv formatted file in Perl and am looking to make things more efficient. My approach has been to split() the file by lines first, and then split() each line again by commas to get the fields. But this suboptimal since at least two passes on the data are required. (once to split by lines, then once again for each line). This is a very large file, so cutting processing in half would be a significant improvement to the entire application. My question is, what is the most time efficient means of parsing a large CSV file using only built in tools? note: Each line has a varying number of tokens, so we can't just ignore lines and split by commas only. Also we can assume fields will contain only alphanumeric ascii data (no special characters or other tricks). Also, i don't want to get into parallel processing, although that might work effectively.

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• Placement of defensive structures in a game

  - by Martin

  I am working on an AI bot for the game Defcon. The game has cities, with varying populations, and defensive structures with limited range. I'm trying to work out a good algorithm for placing defence towers. Cities with higher populations are more important to defend Losing a defence tower is a blow, so towers should be placed reasonably close together Towers and cities can only be placed on land So, with these three rules, we see that the best kind of placement is towers being placed in a ring around the largest population areas (although I don't want an algorithm just to blindly place a ring around the highest area of population, sometime there might be 2 sets of cities far apart, in which case the algorithm should make 2 circles, each one half my total towers). I'm wondering what kind of algorithms might be used for determining placement of towers?

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• What is "=C2=A0" in MIME encoded, quoted-printable text?

  - by TheSoftwareJedi

  This is an example raw email I am trying to parse: MIME-version: 1.0 Content-type: text/html; charset=UTF-8 Content-transfer-encoding: quoted-printable X-Mailer: Verizon Webmail X-Originating-IP: [x.x.x.x] =C2=A0test testing testing 123 What is =C2=A0? I have tried a half dozen quoted-printable parsers, but none handle this correctly. Honestly, for now, I'm coding: //TODO WTF encoded = encoded.Replace("=C2=A0", ""); Because I can't figure out why that text is there randomly within the MIME content, and isn't supposed to be rendered into anything. By just removing it, I'm getting the desired effect - but WHY?!

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• Java/Swing offscreen rendering (Cobra HTMLPanel -> BufferedImage) Problem: Component doesn't finish

  - by Alterscape

  I'm trying to render the contents of a the Java/Swing Cobra HTML renderer to an offscreen BufferedImage, for use elsewhere in my app: slideViewPanel.setDocument(document, rendererContext); BufferedImage test = new BufferedImage(300,300,BufferedImage.TYPE_INT_RGB); Graphics g = test.getGraphics(); slideViewPanel.paint(g); The resulting image in g shows a partially rendered page -- sometimes the contents of the HTMLFrame before the new document was set; sometimes a half-rendered version of the new document. I gather this is because Cobra's setDocument method just schedules the document for re-rendering, but I'm stepping through in the debugger and I don't see a second thread to do re-rendering. Anyone have any insight into what might be happening here?

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• What is the best PHP framework for building a website around a heavily relational PostgreSQL databas

  - by Kenaniah

  First of all, the framework of choice needs to have excellent support for PostgreSQL. I don't care about MySQL because it doesn't have half of the features the application I will be porting requires. (And when I say excellent support, I mean that their approach to database drivers has not been solely trained in MySQL). The ideal framework: Should take full advantage of PHP 5.3 and PostgreSQL 8.4 features Should support new technologies such as OpenID and social networking Should support complex relationships between database relations Should have an intelligent validation system Should have a basic library of helpful views (such as pagination, navigation, etc) Should probably be MVC based Should have excellent documentation and an active development community Should namespace classes intelligently What I'm looking for might be more of a library of utilities, as I really don't want to be restricted by the framework in what I can and can not do. I have my own small library of core classes that take care of business logic, and I will most likely want to integrate those with the new framework as well. Thanks!

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• MPMoviePlayerController switching movies causes white flash

  - by bennythemink

  Hi guys, I have a small UIView that displays a repeated movie. When the user taps a button another movie is loaded and displayed in the same UIView. The problem is that there is a half second "flash" between the removing of the first movie and the displaying of the second. Is there any to remove this? <code> - (void) setUpMovie:(NSString*)title { NSString *url = [[NSBundle mainBundle] pathForResource:title ofType:@"mp4"]; MPMoviePlayerController *player = [[MPMoviePlayerController alloc] initWithContentURL:[NSURL fileURLWithPath:url]]; [[player view] setFrame:self.movieView.bounds]; [self.movieView addSubview:player.view]; if ([title isEqualToString:@"Bo_idle_02"]) { [player setRepeatMode:MPMovieRepeatModeOne]; } else { [player setRepeatMode:MPMovieRepeatModeNone]; } [player setControlStyle:MPMovieControlStyleNone]; [player play]; } - (void) startDanceAnimation { [self setUpMovie:@"Bo_dance_02"]; return; } </code>

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• A file was added to git on commit n. How do I add it instead to commit n-m?

  - by carleeto

  I have a branch. Half way through I noticed git was not tracking a file that it should have been and so I added it as part of a commit and continued with my work. Now, I'm doing a git bisect and all commits before the file was added do not build. So I'm thinking, I need to split the commit that added the file into two parts: the file add and the rest of the commit. I then need to re-order the commits so that the file add commit will be at the beginning of my branch. Is this the correct solution or is there a better way of doing it?

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• avoid preselection of a view when focus is gained android

  - by Sephy

  Hi all, I don't know if the title is very clear, but my issue is as follows : I have an activity with a listview, and on top of this listview, i have a searchfield (edittext). The issue is that when i try debugging on a phone, the virtual keyboard gets out straight after the screen displays the activity... And of course, it's hidding half of the list... So, is there an attribute or something I can use to prevent this from happening?(I still want to keybord to appear when i click the edittext though...) thank you

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• Image reflection in Silverlight 4

  - by Phani Kumar PV

  I am developing a product scrolling feature where products info( product image, Name, price)will be shown side by side horizontally. i need to show the image of the product and also its reflection. under the reflected image i need to show the Prod Name and its price. The problem here is i dont want to show the complete reflected image. the oputput should be something like this Image Height-100% Reflected Image Height-20% Product name Product Price The above pattern will repeat horizontally. I am able to get the desired output with some problem. The reflected image is shown up with hieght 100% and the sapce between the actual image and product name is very high. My reflected image should be a rotated image of the actual image and only half part of the actual image should be shown. Any pointers even is highly appreciated

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• set different volumes inside app

  - by blacksheep

  i'd lioke to set the volume inside the touchesBegan action on half the volume of the IBAction. (void) awakeFromNib { [super awakeFromNib]; engine = [[Finch alloc] init]; E = [[RevolverSound alloc] initWithFile:PATH(@"E.wav")rounds:9]; } -(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { UITouch *touch = [[event allTouches] anyObject]; CGPoint location = [touch locationInView:self.view]; if(CGRectContainsPoint(Edrop.frame,location)){ [E play]; } } (IBAction)bass:(id)sender { if(CGRectIntersectsRect(finga.frame,e.frame)){ if(finga.center.y <= e.center.y) [E play]; } } thanx, blacksheep

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• Algorithm to split an array into N groups based on item index (should be something simple)

  - by serg

  I feel that it should be something very simple and obvious but just stuck on this for the last half an hour and can't move on. All I need is to split an array of elements into N groups based on element index. For example we have an array of 30 elements [e1,e2,...e30], that has to be divided into N=3 groups like this: group1: [e1, ..., e10] group2: [e11, ..., e20] group3: [e21, ..., e30] I came up with nasty mess like this for N=3 (pseudo language, I left multiplication on 0 and 1 just for clarification): for(i=0;i<array_size;i++) { if(i>=0*(array_size/3) && i<1*(array_size/3) { print "group1"; } else if(i>=1*(array_size/3) && i<2*(array_size/3) { print "group2"; } else if(i>=2*(array_size/3) && i<3*(array_size/3) print "group3"; } } But what would be the proper general solution? Thanks.

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• Can I have an XHTML document with an XML declaration in standards mode for IE6?

  - by user225643

  I've been reading about this for the last half hour, and here's what I understand: IE 6 will render a page in standards mode if there's a valid DTD, but not if there are any comments above the DTD. The XML declaration is a comment that goes above the DTD. If the XML declaration is wrapped in a conditional comment, the page will render in IE 6 in quirks mode but be invalid XHTML. Are there any workarounds to getting valid XHTML with an XML declaration to render in standards mode in IE6? If not, what are the disadvantages of removing the XML declaration entirely? Thanks.

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• Html dynamically repeated border-image

  - by Clox

  I have a table which border I want to have a sort of zig-zag shape. I want the table to have an automatic size; resizing depending on how big the browser is. But rrathe than just having an image that gets stretched I want a seamless image that gets repeat instead. I found out this can be done with CSS3's Border-image but by looking and Browser Statistics I can see than only about half of all the viewers will be able to see it since no version of IE does yet support it. So I'm looking for an alternate method. What would be the best way of doing it? Thanks in advance!

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• C++ word to bytes

  - by Vit

  Hi, I tried to read CPUID using assembler in C++. I know there is function for it in , but I want the asm way. So, after CPUID is executed, it should fill eax,ebx,ecx registers with ASCII coded string. But my problem is, since I can in asm adress only full, or half eax register, how to break that 32 bits into 4 bytes. I used this: #include <iostream> #include <stdlib.h> int main() { _asm { cpuid /*There I need to mov values from eax,ebx and ecx to some propriate variables*/ } system("PAUSE"); return(0); }

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• rotating circle with swipe question

  - by Joe

  Okay so I'm making something that basically works as a knob, but only half on the screen -- so I just need horizontal swipes to cause it to rotate. I have it nearly all sorted with one exception: if you change direction of your swipe in mid-swipe, the rotation doesn't change direction. I even can see the problem, but not sure what to do about a solution. So in my touchesMoved, I get the swipe into radians in the predictable way: CGFloat radians = atan2f(location.y - centerY, location.x - centerX); I then store radians, add/subtract it to previous rotation and then give the result to the CATransform3D. So the prob is that even though the swipe changes direction, there is a "balance" which doesn't allow an immediate change of direction. Does this make any sense?

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• regex and javascript, some matches disappear !

  - by dader51

  Here is the code : > var reg = new RegExp(" hel.lo ", 'g'); > > var str = " helalo helblo helclo heldlo "; > > var mat = str.match(reg); > > alert(mat); It alerts "helalo, helclo", but i expect it to be "helalo, helblo, helclo, heldlo" . Only the half of them matches, I guess that's because of the space wich count only once. So I tried to double every space before processing, but in some case it's not enough. I'm looking for an explanation, and a solution. Thx

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• Places to start for system programmer transitioning to web programming

  - by Sean Ochoa

  So here's where I'm coming from: My background is in C#, C++, VB Script, php, javascript, PowerShell, T-SQL, and VB 6. I have some experience with python, and a brief introduction to Ruby On Rails. At work, we're transitioning to a web based UI in the next year or so, but in asp.net & SilverLight. I would like to, if possible, learn more open source web technologies on the side. And, hopefully, in a year and a half or so, I would like to transition to a more open source web technology position. I found that I do really like python, but I'm open to pretty much anything. And yes, I do know Linux (ubuntu and gentoo), as well. And, here's my question: What technologies, frameworks, IDEs, or systems should I be highly proficient in to become a prime candidate for a position doing web application development using non-Microsoft technologies?

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• long processes php

  - by significance

  hi, i need to run a really long php script (four and half, five hours). the script sometimes runs successfully, but sometimes gets killed inexplicably (poss something to do with the shared hosting??). i think that the solution maybe to run the script is smaller chunks. in order to do this i have written a script that stores it's status & position in an xml file, and executes one chunk of the script, before moving the position on. i am having problems hooking up the last bit of the script, which should end the current process & re-execute the script. or maybe i am barking up the wrong tree completely! i have read through what i can find on SO and elsewhere but i'm still none the wiser :( please help!!! dan

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• Jquery SimpleModal flickers in Firefox

  - by Obay

  I'm using SimpleModal plugin for Jquery and I have a weird problem with Firefox ( other browsers work fine: Chrome, Safari, Opera, IE). What happens is when I click on the button that launches the modal dialog, before showing the modal (and the fadeIn of the overlay), there is a quick "flicker", less than half a second. (It's longer on my slower PC). Weird thing is, it didn't happen in Firefox 3.5.2, but when I upgraded to 3.6.3, I got the flicker. Any ideas? Here is my code: $("#popup").modal({ onOpen: function (dialog) { dialog.data.show(); dialog.container.show(); dialog.overlay.fadeIn('fast'); }, onClose: function (dialog) { dialog.data.hide(); dialog.container.hide(); dialog.overlay.fadeOut('fast', function() { $.modal.close(); }); } });

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• Starting synergy automatically on RHEL/CentOS

  - by Matt

  I have a Red Had Enterprise Linux 5 and a CentOS 5 box, both of which I am trying to configure to automatically connect to a synergy server on startup. I have followed the guide at http://synergy2.sourceforge.net/autostart.html and configured them the same way I configured previous Ubuntu 7.10 boxes, and this only seems to get me half way there. Currently, synergy connects at the login screen, but once I login, it doesn't come back up. I added the following lines to /etc/gdm/{Init,PostLogin,PreSession}/Default : /usr/bin/killall synergyc sleep 1 /usr/bin/synergyc fried-chicken # Init,PreSession only All files are owned by root:root with 755 permissions, I'm just not sure what I'm missing here.

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• [Python] How do I read binary pickle data first, then unpickle it?

  - by conradlee

  I'm unpickling a NetworkX object that's about 1GB in size on disk. Although I saved it in the binary format (using protocol 2), it is taking a very long time to unpickle this file---at least half an hour. The system I'm running on has plenty of system memory (128 GB), so that's not the bottleneck. I've read here that pickling can be sped up by first reading the entire file into memory, and then unpickling it (that particular thread refers to python 3.0, which I'm not using, but the point should still be true in python 2.6). How do I first read the binary file, and then unpickle it? I have tried: import cPickle as pickle f = open("big_networkx_graph.pickle","rb") bin_data = f.read() graph_data = pickle.load(bin_data) But this returns: TypeError: argument must have 'read' and 'readline' attributes Any ideas?

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• Is GAE Really GZipping My Content? Slow Response Times with GAE as CDN

  - by viatropos

  I am testing out Google App Engine as a free Content Delivery Network and it feels like it's taking a long time to serve up my content. Why does this gae page take a say a half a second to download, while your typical stack overflow page downloads much faster even with a ton more content? What am I missing here? All I have done is create an app and uploaded an image according to that tutorial, but content is being served very slowly it seems. Any suggestions? (Not considering Amazon or other CDNs right now, just looking for help with GAE). Note: I am using Safari when I visit those links, maybe safari is causing problems?

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• Recommended way to make animation in Android

  - by Alin

  I've searched around the web to learn more about animating a character in Android but didn't fully understood it. I ask here maybe you could give me some advices or hints on how to make it in the best possible way. Scenario Imagine 5 drawn characters (let's say 5 human heads). I need to animate them. By animation I mean make eyes blink, smile, laugh etc. Right now I am working on making bitmap resources on each animation. For example for the blink animation, basically I have 3 images, one with eyes open, one with eyes half closed, one with eyes closed. I need to animate the character to use all these 3 images. This is all the animation I need, nothing more fancier. Any suggestions from where to start ?

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• How to Format Code in Research Reports

  - by RoseOfJericho

  I am currently writing a formal research report, and I'll be including code with this report. Question: Is there an accepted way of displaying code in research reports? I'm thinking both in terms of font, spacing, et cetera, and whether the code should be displayed inside the document, or in an appendix. The code will be JavaScript and PHP. None of the sections of code will be more than 25 lines (so they're mere snippets). There will be approx. half a dozen snippets. Each of the snippets will have a couple of paragraphs explaining what is happening in the code, and a discussion on its pros/cons. I have no contact with the body the report will be submitted to, and they have no published guidelines on how to format code (please do not question these points). Any help considered and appreciated.

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• MATLAB submatrix over variable dimensions

  - by rlbond

  I have a variable dimension matrix, X. I want a function that will get the first half of X in one dimension. I.E., I want something like this: function x = variableSubmatrix(x, d) if d == 1 switch ndims(x) case 1 x = x(1:end/2); case 2 x = x(1:end/2, :); case 3 x = x(1:end/2, :, :); (...) end elseif d == 2 switch ndims(x) case 2 x = x(:, 1:end/2); case 3 x = x(:, 1:end/2, :); (...) end elseif (...) end end I'm not quite sure how to do this. I need it to be fast, as this will be used many times in computation.

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