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• IRC Server configuration possibilities

  - by Katai

  I need to know a couple of things, concerning IRC servers that I couldnt directly find out over google (or werent clear enough for me to be sure if it actually works) I'm working at a larger community site, and wanted to deliver an in-page chat. Since it would be a nice feature to let people access it from outside too, over their own clients, I tought implementing an IRC Server would be the best solution (probably dedicated, I'll have to teach myself a couple of things for that) I plan to include a Web-based IRC client over an APE Client / Server. The problem is, I want to strip down the user rights, to disallow many functionalities that IRC would offer: Change of nicknames: The user logs in over the Page login, and I'll automatically create an IRC auth for this user with that password. So basically, he would connect to the IRC client over a button. And after connecting, he shouldnt be able to change his nickname at all Creating channels: I want the possibility to create channels, but not from 'normal' users. Basically, I would prefer to set up basic channels that are public, and if a user really creates an own channel, that one should be private and via invitation (is that possible?) Private conversations: private conversations should be filtered out from the allaround IRC client, into separate 'in-browser-windows' that I create over JS. I guess I just have to filter the stuff coming from IRC - or is there a better solution to that? Only 'registered' users have access: Like I said, if someone registers on the page, I would like to create an IRC 'account' for him. Users that arent registered on the page, cant access the IRC server at all (or get thrown out). Mainly to avoid spammers or bots from outside. Is this stuff solvable over IRC? I've read some FAQ's and Instructions for IRC OP's and servers, but I couldnt find a clear answer - it seems that everyone can do pretty much everything - I would like to configure it in a way that user possibilities are more cut down. Basically, giving users the possibility to chat, but not more. So the Question basically is, how possible / solvable this issues are allaround, or if I have to find other solutions for this.

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• Sometimes Xcode appears to ignore target build settings?

  - by Derek Clarkson

  Hi all, I've created a iPhone static library project with two targets like this Project -- Library (Device) target -- Library (simulator) target The device target has the SDK set to the device so it produces an armv6/7 library and the simulator target is set to the simulator SDK so it produces an i386 library. The issue I'm having is that the SDK settings on the targets keep getting overridden by the XCode active target setting. i.e. if I build the device target, but the XCode window is showing the active SDK as being the simlulator, XCode will build a simulator library instead of a device library, ignoring the settings of the target. Although it will put it into the *-iphoneos/ directory in the build directories! I originally had the same issue with another static library project, and after a lot of playing around got everything to work correctly. i.e. The targets ignore the XCode active SDK because they have their own specifications of what to build. The problem is that I don't know what made it work in that project and I have not been able to reproduce the issue in it either. Does anyone have any ideas as to what is going on? ciao Derek

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• Using Directives, Namespace and Assembly Reference - all jumbled up with StyleCop!

  - by Jack

  I like to adhere to StyleCop's formatting rules to make code nice and clear, but I've recently had a problem with one of its warnings: All using directives must be placed inside of the namespace. My problem is that I have using directives, an assembly reference (for mocking file deletion), and a namespace to juggle in one of my test classes: using System; using System.IO; using Microsoft.Moles.Framework; using Microsoft.VisualStudio.TestTools.UnitTesting; [assembly: MoledType(typeof(System.IO.File))] namespace MyNamespace { //Some Code } The above allows tests to be run fine - but StyleCop complains about the using directives not being inside the namespace. Putting the usings inside the namespace gives the error that "MoledType" is not recognised. Putting both the usings and the assembly reference inside the namespace gives the error 'assembly' is not a valid attribute location for this declaration. Valid attribute locations for this declaration are 'type'. All attributes in this block will be ignored. It seems I've tried every layout I can but to no avail - either the solution won't build, the mocking won't work or StyleCop complains! Does anyone know a way to set these out so that everything's happy? Or am I going to have to ignore the StyleCop warning in this case?

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• Tagging translated text correctly (tagging with lang="")

  - by toomanyairmiles

  A client has asked me to add some polish text to their website, not having much experience in this area, can anyone tell me which of the two 'lang' solutions below is correct (or offer an alternative):- Tag everything:- <div lang="pl"> <h2 lang="pl">Najlepszy ruch jaki zrobisz!</h2> <p lang="pl">Do przyszlych najemców:</p> <p lang="pl">Tutaj w SPS mamy bogate doswiadczenie na rynku najmu i wyszukiwaniu domu, który bedzie idealnym miejscem dla przyszlych lokatorów. Dla wielu moze to byc trudne i stresujace, dlatego my w SPS pomozemy Wam przejsc przez pole minowe zwiazane z najmem i uczynic ten proces najprostszym i najszybszym jak to mozliwe.</p> <p lang="pl">Jesli szukasz nieruchomosci obecnie lub w najblizszej przyszlosci prosimy o kontakt z naszym doswiadczonym , przyjaznym i pomocnym personelem, a my postaramy sie pomóc znalezc Ci idealne miejsce, które jest wlasnie dla Ciebie.</p> <p lang="pl">Wiec aby w latwy sposób wynajac zadzwon juz dzis.</p> </div> Just tag the div <div lang="pl"> <h2>Najlepszy ruch jaki zrobisz!</h2> <p>Do przyszlych najemców:</p> <p>Tutaj w SPS mamy bogate doswiadczenie na rynku najmu i wyszukiwaniu domu, który bedzie idealnym miejscem dla przyszlych lokatorów. Dla wielu moze to byc trudne i stresujace, dlatego my w SPS pomozemy Wam przejsc przez pole minowe zwiazane z najmem i uczynic ten proces najprostszym i najszybszym jak to mozliwe.</p> <p>Jesli szukasz nieruchomosci obecnie lub w najblizszej przyszlosci prosimy o kontakt z naszym doswiadczonym , przyjaznym i pomocnym personelem, a my postaramy sie pomóc znalezc Ci idealne miejsce, które jest wlasnie dla Ciebie.</p> <p>Wiec aby w latwy sposób wynajac zadzwon juz dzis.</p> </div>

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• Subview Doesnt AutoSize When Added to Root View Controller

  - by Per

  Hello, I have a root view controller that will have up to 10 or so subviews. I am implementing autorotation/autosize accross the entire app. My problem is this: - When I allocate all the view controllers and add each as a subview to the root controller during startup, everything works as it should. The only problem is that each view controller needs time to initialize. This causes my application to load very slowly. Instead I am trying to allocate the view controllers as they are required. Now I find that if the application goes into Landscape, and I allocate a view controller that is designed in portrait, it will autorotate but the autosize doesnt happen. In other words as soon as the subview is added to the root controller in portrait mode it rotates and sizes correctly (and stays that way). If the subview is added when the root controller is in landscape it rotates but doesnt autosize (and view sizes remain messed up rotating back to portrait) I have tried to force an autosize by calling SetNeedsLayout, SetNeedsDisplay, and LayoutIfNeeded but nothing works. I know i could probably do this manually by determining the root controllers orientation and resizing the subviews appropriately, but this is a lot of work for something that should work automatically. Am I missing something? Any help would be appreciated. My project is an iPad port from an iPhone app, the iPhone app doesnt rotate so Im not sure if this may be something wrong with the 3.2 beta.

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• Developing a rich internet application

  - by Serge

  Hello, I have been a desktop developer for a few years mostly doing object oriented stuff. I am trying to branch out into web development, and as a hobby project trying to put a web application together. I have been reading quite alot of information, but I still can't seem to decide on the path to take and would really like some advice. Basically, I want to build something like this: http://mon.itor.us/ I have found this as well: http://www.trilancer.com/jpolite/#t1 But so far it is of little use as I am trying to grasp Javascript. I have been using visual studio for that, is that a good IDE for this tye of thing or should I try expression blend? Jpolite seems to do everything with javascript, which seems kind of cool, but I if I want to make a chart inside a widget that connects to a database, do I need something more? Is this where ASP.NET comes in? I am familiar with .NET, but if I use ASP.NET for my website, do I have to host it on IIS and windows server as opposed to Apache since mono is still being ironed out? Because that would cost more, so would PHP be a better choice? Also, for charting these guys as well as google seem to use flex: http://www.google.com/finance I have found this: http://www.reynoldsftw.com/2009/03/javascript-chart-alternatives/ Would that be sufficient to implement something like google fiance purely in javascript or is there a good reason they use flex? SOrry for the long post but I was trying to be as detailed as possible. Thanks.

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• window.onload seems to trigger before the DOM is loaded (JavaScript)

  - by Dr. Monkey

  I am having trouble with the window.onload and document.onload events. Everything I read tells me these will not trigger until the DOM is fully loaded with all its resources, it seems like this isn't happening for me: I tried the following simple page in Chrome 4.1.249.1036 (41514) and IE 8.0.7600.16385 with the same result: both displayed the message "It failed!", indicating that myParagraph is not loaded (and so the DOM seems incomplete). <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en"> <head> <script type="text/javascript"> window.onload = doThis(); // document.onload gives the same result function doThis() { if (document.getElementById("myParagraph")) { alert("It worked!"); } else { alert("It failed!"); } } </script> </head> <body> <p id="myParagraph">Nothing is here.</p> </body> </html> I am using more complex scripts than this, in an external .js file, but this illustrates the problem. I can get it working by having window.onload set a timer for half a second to run doThis(), but this seems like an inelegant solution, and doesn't answer the question of why window.onload doesn't seem to do what everyone says it does. Another solution would be to set a timer that will check if the DOM is loaded, and if not it will just call itself half a second later (so it will keep checking until the DOM is loaded), but this seems overly complex to me. Is there a more appropriate event to use?

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• Jruby and ffi: Function 'xmlFirstElementChild' not found in [libexslt.so]

  - by danilo

  On a ubuntu server, with everything installed (checked against another pc where this works just fine) When trying to run warble on one of my jruby projects, I get this error: Function 'xmlFirstElementChild' not found in [libexslt.so] /opt/jruby-1.5.0/lib/ruby/site_ruby/shared/ffi/ffi.rb:112:in `create_invoker' /opt/jruby-1.5.0/lib/ruby/site_ruby/shared/ffi/library.rb:98:in `attach_function' /opt/jruby-1.5.0/lib/ruby/site_ruby/shared/ffi/library.rb:96:in `each' /opt/jruby-1.5.0/lib/ruby/site_ruby/shared/ffi/library.rb:96:in `attach_function' /opt/jruby-1.5.0/lib/ruby/gems/1.8/gems/nokogiri-1.4.2-java/lib/nokogiri/ffi/libxml.rb:116 /opt/jruby-1.5.0/lib/ruby/gems/1.8/gems/nokogiri-1.4.2-java/lib/nokogiri/ffi/libxml.rb:31:in `require' /opt/jruby-1.5.0/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require' /opt/jruby-1.5.0/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:156:in `require' /opt/jruby-1.5.0/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:521:in `new_constants_in' /opt/jruby-1.5.0/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:156:in `require' /opt/jruby-1.5.0/lib/ruby/gems/1.8/gems/nokogiri-1.4.2-java/lib/nokogiri.rb:11 /opt/jruby-1.5.0/lib/ruby/gems/1.8/gems/nokogiri-1.4.2-java/lib/nokogiri.rb:36:in `require'/ /opt/jruby-1.5.0/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:36:in `require' /opt/jruby-1.5.0/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:156:in `require' /opt/jruby-1.5.0/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:521:in `new_constants_in' /opt/jruby-1.5.0/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:156:in `require' [...] all libraries and required gems seem to be there. Google didn't help, and the strange thing is that on other pc this works fine... danilo

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• Missing chars in JpGraph

  - by Álvaro G. Vicario

  I have a web site that runs on Windows and uses cp1252 (aka Win-1252) so it can display Spanish characters. The app generates some plots with JpGraph 2.3. These plots use the Tahoma Open Type font family to display text labels. Strings are provided in ANSI (i.e., cp1252) and font files support cp1252 (actually, the *.ttf files were copied from the system's font folder). It's been working fine in several setups from PHP/5.2.6 to PHP/5.3.0. Problems started when I ran the app under PHP/5.3.1: all non-ASCII are replaced by the hollow rectangle that represents missing or unknown chars. JpGraph's documentation is not very precise about how it expects international chars. Apparently, text is handled internally by the imagettftext() function, which expects UTF-8. However, encoding everything as UTF-8 breaks the app in all the systems. Where ANSI used to work fine, I get wrong characters (Ê instead of Ú). Where I got missing chars, now I get a PHP error: Warning: imagettftext(): any2eucjp(): something happen Do you have any clue about what changed in GD2 from PHP/5.3.0 to 5.3.1 that could be affecting the rendering on non-ASCII chars? How am I expected to feed JpGraph with strings in the Win-1252 charset?

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• How can I render a list of objects using DisplayFor but from the controller in ASP.NET MVC?

  - by Darragh

  Here's the scenaio, I have an Employee object and a Company object which has a list of employees. I have Company.aspx which inherits from ViewPage<Company>. In Company.aspx I call Html.DisplayFor(m => m.Employees). I have an Employee.ascx partial view which inherits from ViewUserControl<Employee in my DisplayTemplates folder. Everything works fine and Company.aspx renders the Employee.ascx partial for each employee. Now I have two additional methods on my controller called GetEmployees and GetEmployee(Id). In the GetEmployee(Id) action I want to return the markup to display this one employee, and in GetEmployees() I want to render the markup to display all the employees (these two action methods will be called via AJAX). In the GetEmployee action I call return PartialView("DisplayTemplates\Employee", employee) This works, although I'd prefer something like return PartialViewFor(employee) which would determine the view name by convention. Anwyay, my question is how should I implement the GetEmployees() action? I don't want to create any more views, because frankly, I don't see why I should have to. I've tried the following which fails miserably :) return Content(New HtmlHelper<IList<Of DebtDto>>(null, null).DisplayFor(m => debts)); However if I could create an instance of an HtmlHelper object in my controller, I suppose I could get it to work, but it feels wrong. Any ideas? Have i missed something obvious?

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• Project setup for creating third party libraries for Android

  - by Jarle Hansen

  Hi all, I am creating a library for Android that others can include in their own project. So far I have been working on it as a normal Java project with JDK 1.6 setup as system library. This works just fine in Eclipse when I add the android.jar. The issue comes when I try to my build script. I am running Gradle and doing a normal compile and test build cycle. My thoughts were that it does not matter if I compile it with a normal JDK, since this is not a standalone application. The benefits by creating a normal Java project is that Gradle does support this much better. My project also does not contain any UI at all. However, the problem is that of course android.jar and the JDK contains lots of the same classes and I think that this is what messes up my build script. Everything crashes when running the tests (the tests are in the same project under src/test/java). My question is, how should I create this project that is meant to be included in Android projects as a third party library? Should I create it as an Android project in Eclipse even though I am only creating a library that does not use any of the UI features? Also, should the tests be in a separate project? Thanks for all responses!

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• PHP Simple DOM Parser

  - by Junior Coder

  Hi guys I'm using this wonderful class here to do a bit of code embed filtering: http://simplehtmldom.sourceforge.net/. It extends the PHP DOM document class. Pretty much what I am doing is parsing a string through this class that contains embed code, i grab the unique bits of information eg id, width, height send through a handler function which inserts the id, width, height etc into my predefined "safe" template and reinsert my safe template in the place of the embed code the user has put in. May seem a backward way of doing it but it's the way it has to be done :) All of that works fine. Problem is when there is more than just embed code contained in the string, as I can't just replace the embed code i can only replace the entire string which wipes the rest of the tags etc string. For example if there were a p tag that would be wiped. So my question is how using this class can i just replace the certain part of the string? Spent the last few days trying to work this out and need some more input. It appears the class can do this so i'm stumped. Here's a basic version of what i have so far :) // load the class $html = new simple_html_dom(); // load the entire string containing everything user entered here $return = $html->load($string); // check for embed tags if($html->find('embed') == true { foreach($html->find('embed') as $element) { // send it off to the function which returns a new safe embed code $element = create_new_embed($parameters); // this is where i somehow i need to save the changes and send it back to $return } } Any input would be gratefully appreciated. If i have explained my problem well enough please let me know :)

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• struts2: Redirect from global interceptor

  - by Dewfy

  In struts2 I have very simple task, after user is logged-in I'm checking if they profile is complete. If not user should be blocked from any other action and redirected to edit page. So I have created my default package: <package name="main" extends="tiles-default" > <interceptors> <interceptor name="checkProfile" class="my.CheckProfileInterceptor" /> <interceptor-stack name="secure"> <interceptor-ref name="defaultStack"/> <interceptor-ref name="checkProfile"/> </interceptor-stack> </interceptors> <default-interceptor-ref name="secure"/> </package> After it all my packages would include this template as a base: <package namespace="/packageA" name="packageA" extends="main"> ... <package namespace="/packageB" name="packageB" extends="main"> ... Saying editing page is /packageA/editProfile, my interceptor does following: public String intercept(ActionInvocation actionInvocation) throws Exception { if( currentUser.isOk() ) return "editProfile"; ... BUT! interceptor is global, so it raises struts2 error: No result defined for action (name of editProfile action class) When interceptor is placed inside some package - then everything ok. What should i do to declare global action?

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• sendto: Invalid Argument

  - by Sylvain

  Hi, I have a list<struct sockaddr_in> _peers I'd like to use for sendto() the list is filled this way struct hostent *hp; hp = gethostbyname(hostname); sockaddr_in sin; bzero(&sin, sizeof(sin)); sin.sin_family = AF_INET; sin.sin_port = htons(port); sin.sin_addr.s_addr = *(in_addr_t *)hp->h_addr; _peers.push_front(sin); and here's how I try to send: for (list<struct sockaddr_in>::iterator it = _peers.begin(); it != _peers.end(); ++it) { if (sendto(_s, "PING", 5, 0, (struct sockaddr *)&(*it), sizeof(struct sockaddr_in)) < 0) perror("sendto"); } outputs: sendto: Invalid argument If I create the struct sockaddr_in right before sendto(), everything works fine, so I guess I fail at using the list properly ... I also tested using &_peers.front() directly and still get the same error ... what am I doing wrong? Thanks in advance,

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• Retrieve 2 last posts for each category.

  - by Savageman

  Hello, Lets say I have 2 tables: blog_posts and categories. Each blog post belongs to only ONE category, so there is basically a foreign key between the 2 tables here. I would like to retrieve the 2 lasts posts from each category, is it possible to achieve this in a single request? GROUP BY would group everything and leave me with only one row in each category. But I want 2 of them. It would be easy to perform 1 + N query (N = number of category). First retrieve the categories. And then retrieve 2 posts from each category. I believe it would also be quite easy to perform M queries (M = number of posts I want from each category). First query selects the first post for each category (with a group by). Second query retrieves the second post for each category. etc. I'm just wondering if someone has a better solution for this. I don't really mind doing 1+N queries for that, but for curiosity and general SQL knowledge, it would be appreciated! Thanks in advance to whom can help me with this.

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• Conversion to Dalvik format failed error for Android Grid View

  - by Bub

  Hey Everyone, I'm on the android bandwagon and started going through google's "view" tutorials. Here is what I'm using: Eclipse Galileo Android SDK 2.1 Java SDK 6.Something I think. Everything was hunky-dory until I hit the grid view tutorial. I got errors all over the place when I started editing the "HelloGridview.java" File. I thought I'd fix it by following through with the next part of the tutorial, creating the ImageAdapter class, but it created more. I realized alot of my issues could be resolved by importing widgets which were not mentioned in the tutorial (i.e. android.widget.GridView, .ImageView, .BaseAdapter etc.) However, after all the reconciliation suggested by eclipse the files were finally showing no errors. I go to run it as an android app and bam, "Your project contains error(s)." window comes up. There are no errors showing on the files I've created. I cleared the error log and shut down eclipse and started again the error log now reads: Conversion to Dalvik format failed with error 1. I'm a little lost at this point. I think I've included the required information. If you need to know more let me know. Any help is appreciated.

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• Python win32com - Automating Word - How to replace text in a text box?

  - by Greg

  I'm trying to automate word to replace text in a word document using Python. (I'm on word 2003 if that matters and Python 2.4) The first part of my replace method below works on everything except text in text boxes. The text just doesn't get selected. I notice when I go into Word manually and hit ctrl-A all of the text gets selected except for the text box. Here's my code so far: class Word: def __init__(self,visible=0,screenupdating=0): pythoncom.CoInitialize() self.app=gencache.EnsureDispatch(WORD) self.app.Visible = visible self.app.DisplayAlerts = 0 self.app.ScreenUpdating = screenupdating print 'Starting word' def open(self,doc): self.opendoc=os.path.basename(doc) self.app.Documents.Open(FileName=doc) def replace(self,source,target): if target=='':target=' ' alltext=self.app.Documents(self.opendoc).Range(Start=0,End=self.app.Documents(self.opendoc).Characters.Count) #select all alltext.Find.Text = source alltext.Find.Replacement.Text = target alltext.Find.Execute(Replace=1,Forward=True) #Special handling to do replace in text boxes #http://word.tips.net/Pages/T003879_Updating_a_Field_in_a_Text_Box.html for shp in self.app.Documents(self.opendoc).Shapes: if shp.TextFrame.HasText: shp.TextFrame.TextRange.Find.Text = source shp.TextFrame.TextRange.Find.Replacement.Text = target shp.TextFrame.TextRange.Find.Execute(Replace=1,Forward=True) #My Usage word=Word(visible=1,screenupdating=1) word.open(r'C:\Invoice Automation\testTB.doc') word.replace('[PGN]','1') The for shp in self.app .. section is my attempt to hit the text boxes. It seems to find the text box, but it doesn't replace anything.

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• Autoresize UIScrollView

  - by Sebastian

  I made a UIViewController, which programatically generates a UIScrollView. Everything's fine, but when I rotate the Device, the UIScollView should resize so it takes the complete width of my View. Is there a way to do that without rebuilding the complete UIScrollView ? Thx a lot ! Sebastian This is called in my viewDidLoad: -(void)buildmyScroller { myScroller = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 800, 768, 100)]; //...adding some subviews to myScroller thumbScroller.contentSize = CGSizeMake(3000, 100); [[self view] addSubview:myScroller]; } Then I tried to resize myScroller with this: -(void)changemyScroller { UIInterfaceOrientation interfaceOrientation = self.interfaceOrientation; if (interfaceOrientation == UIInterfaceOrientationPortrait) { [thumbScroller setFrame:CGRectMake(0, 805, 768, 150)]; } else if (interfaceOrientation == UIInterfaceOrientationPortraitUpsideDown){ thumbScroller.frame = CGRectMake(0, 805, 768, 150); } else if (interfaceOrientation == UIInterfaceOrientationLandscapeLeft){ thumbScroller.frame = CGRectMake(0, 549, 1024, 150); } else if (interfaceOrientation == UIInterfaceOrientationLandscapeRight){ thumbScroller.frame = CGRectMake(0, 549, 1024, 150); } } And called the method in didAnimateFirstHalf... cause I'm not shure where else to call it. Thx a lot again !!

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• jQuery, html5, append()/appendTo() and IE

  - by karbassi

  How to replicate: Create an html5 page. Make sure you have the script from remysharp.com/2009/01/07/html5-enabling-script/ added so that IE will notice the tags. Create an hardcoded <section id='anything'></section> tag. Using jQuery 1.3.2, append another section tag: $('#anything').append('<section id="whatever"></section>'); So far, everything works in all the browsers. Repeat the previous step. $('#whatever').append('<section id="fail"></section>'); This is where IE6/7 fails. Firefox/Safari will continue working. Error This is the error displayed. Thoughts It could be that IE6/7 can't handle the HTML5 section tag. I say this because when I change step 4 from <section> to <div>, IE6/7 will start working. If I use document.createElement() and create my new element, it works, but it seems like jQuery's append() has a problem with html5 elements.

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• add/remove items in a list

  - by Jam

  I'm trying to create a player who can add and remove items from their inventory. I have everything working, I just have 1 small problem. Every time it prints the inventory, 'None' also appears. I've been messing with it to try and remove that, but no matter what I do, 'None' always appears in the program! I know I'm just missing something simple, but I can't figure it out for the life of me. class Player(object): def __init__(self, name, max_items, items): self.name=name self.max_items=max_items self.items=items def inventory(self): for item in self.items: print item def take(self, new_item): if len(self.items)<self.max_items: self.items.append(new_item) else: print "You can't carry any more items!" def drop(self, old_item): if old_item in self.items: self.items.remove(old_item) else: print "You don't have that item." def main(): player=Player("Jimmy", 5, ['sword', 'shield', 'ax']) print "Max items:", player.max_items print "Inventory:", player.inventory() choice=None while choice!="0": print \ """ Inventory Man 0 - Quit 1 - Add an item to inventory 2 - Remove an item from inventory """ choice=raw_input("Choice: ") print if choice=="0": print "Good-bye." elif choice=="1": new_item=raw_input("What item would you like to add to your inventory?") player.take(new_item) print "Inventory:", player.inventory() elif choice=="2": old_item=raw_input("What item would you like to remove from your inventory?") player.drop(old_item) print "Inventory:", player.inventory() else: print "\nSorry, but", choice, "isn't a valid choice." main() raw_input("Press enter to exit.")

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• How to explain to someone that a data structure should not draw itself, explaining separation of con

  - by leeand00

  I have another programmer who I'm trying to explain why it is that a UI component should not also be a data-structure. For instance say that you get a data-structure that contains a record-set from the "database", and you wish to display that record-set in a UI component within your application. According to this programmer (who will remain nameless, he's young and I'm teaching him...), we should subclass the data-structure into a class that will draw the UI component within our application!!!!!! And thus according to this logic, the record-set should manage the drawing of the UI. **Head Desk*** I know that asking a record-set to draw itself is wrong, because, if you wish to render the same data-structure on more than one type of component on your UI, you are going to have a real mess on your hands; you'll need to extend yet another class for each and every UI component that you render from the base-class of your record-set; I am well aware of the "cleanliness" of the of the MVC pattern (and by that what I really mean is you don't confuse your data (the Model) with your UI (the view) or the actions that take place on the data (the Controller more or less...okay not really the API should really handle that...and the Controller should just make as few calls to it as it can, telling it which view to render)) But it's certainly alot cleaner than using data-structures to render UI components! Is there any other advice I could send his way other than the example above? I understand that when you first learn OOP you go through "a stage" where you where just want to extend everything. Followed by a stage when you think that Design Patterns are the solution every single problem...which isn't entirely correct either...thanks Jeff. Is there a way that I can gently nudge this kid in the right direction? Do you have any more examples that might help explain my point to him?

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• Preventing Processes From Spawning Using .NET Code

  - by Matt

  I remember coming across an article on I think CodeProject quite some time ago regarding an antivirus or antimalware some guy was writing where he hooked into the Windows API to be able to catch whenever a new process was started and was prompting he user before allowing the process to start. I can no longer find the article, and would actually like to be able to implement something like this. Currently, we have a custom browser built on Gecko that we've integrated access restrictions to sites based on our internal employee security levels, etc. We prevent any other browser from running with a timer and a call to Process.GetProcessesByName() from a list of the browsers we don't allow. What we want to accomplish is, instead of just blocking these browsers, where there is a small delay between the other browser starting and it being killed by our service, we'd like to be able to display a dialog instead of the process launching at all, explaining that the program isn't in the allowed list. This way, we can generate a list of "allowed" processes and just block everything else (we haven't yet had a problem with outside apps being installed, but you can never be too careful). Unfortunately, we don't do much Windows API programming from C#, so I'm not sure where to begin looking for what calls we need to hook. Even just a starting point of what to read up on would be helpful.

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• Why is my addSubview: method causing a leak?

  - by Nathan

  Okay, so I have done a ton of research on this and have been pulling my hair out for days trying to figure out why the following code leaks: [UIApplication sharedApplication].networkActivityIndicatorVisible = YES; UIImage *comicImage = [self getCachedImage:[NSString stringWithFormat:@"%@%@%@",@"http://url/",comicNumber,@".png"]]; self.imageView = [[[UIImageView alloc] initWithImage:comicImage] autorelease]; [self.scrollView addSubview:self.imageView]; self.scrollView.contentSize = self.imageView.frame.size; self.imageWidth = [NSString stringWithFormat:@"%f",imageView.frame.size.width]; [UIApplication sharedApplication].networkActivityIndicatorVisible = NO; Both self.imageView and self.scrollView are @propety (nonatomic, retain) and released in my dealloc.. imageView isn't used anywhere else in the code. This code is also run in a thread off of the main thread. If I run this code on my device, it will quickly run out of memory if I continually load this view. However, I've found if I comment out the following line: [UIApplication sharedApplication].networkActivityIndicatorVisible = YES; UIImage *comicImage = [self getCachedImage:[NSString stringWithFormat:@"%@%@%@",@"http://url/",comicNumber,@".png"]]; self.imageView = [[[UIImageView alloc] initWithImage:comicImage] autorelease]; //[self.scrollView addSubview:self.imageView]; self.scrollView.contentSize = self.imageView.frame.size; self.imageWidth = [NSString stringWithFormat:@"%f",imageView.frame.size.width]; [UIApplication sharedApplication].networkActivityIndicatorVisible = NO; Memory usage becomes stable, no matter how many times I load the view. I have gone over everything I can think to see why this is leaking, but as far as I can tell I have all my releases straight. Can anyone see what I am missing?

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• Entity Framework Multiple associations to a table causes error 3033

  - by taylonr

  I'm using EF 3.5 SP1. I have 3 tables: Pendants PendantAccessories PartsData Basically #1 and 2 are used for product selection, so #1 has a "Number of Buttons" property and other options. #2 has fields like "Cable Type" etc. The third table contains property information for all of our parts, such as what plant it's manufactured in, it's weight etc. What I'm trying to do is set up an association between #1 and #3 and also between #2 and #3. The PK in all 3 tables is the PartNumber. I set it up between #2 and 3 by going into Mapping Details and adding a Maps to PartsData and mapping the columns. Everything worked good. I then tried the same thing between #1 and 3. However, now when I compile I get "Error 3033: Problem in Mapping Fragment starting at line 713: EntitySets 'pendants' and 'pendantAccessories' are both mapped to the table 'PartsData'. Their Primary Keys may collide." Does anyone know what I'm doing wrong here?

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• Is SQLDataReader slower than using the command line utility sqlcmd?

  - by Andrew

  I was recently advocating to a colleague that we replace some C# code that uses the sqlcmd command line utility with a SqlDataReader. The old code uses: System.Diagnostics.ProcessStartInfo procStartInfo = new System.Diagnostics.ProcessStartInfo("cmd", "/c " + sqlCmd); wher sqlCmd is something like "sqlcmd -S " + serverName + " -y 0 -h-1 -Q " + "\"" + "USE [" + database + "]" + ";+ txtQuery.Text +"\"";\ The results are then parsed using regular expressions. I argued that using a SQLDataReader woud be more in line with industry practices, easier to debug and maintain and probably faster. However, the SQLDataReader approach is at least the same speed and quite possibly slower. I believe I'm doing everything correctly with SQLDataReader. The code is: using (SqlConnection connection = new SqlConnection()) { try { SqlConnectionStringBuilder builder = new SqlConnectionStringBuilder(connectionString); connection.ConnectionString = builder.ToString(); ; SqlCommand command = new SqlCommand(queryString, connection); connection.Open(); SqlDataReader reader = command.ExecuteReader(); // do stuff w/ reader reader.Close(); } catch (Exception ex) { outputMessage += (ex.Message); } } I've used System.Diagnostics.Stopwatch to time both approaches and the command line utility (called from C# code) does seem faster (20-40%?). The SqlDataReader has the neat feature that when the same code is called again, it's lightening fast, but for this application we don't anticipate that. I have already done some research on this problem. I note that the command line utility sqlcmd uses OLE DB technology to hit the database. Is that faster than ADO.NET? I'm really suprised, especially since the command line utility approach involves starting up a process. I really thought it would be slower. Any thoughts? Thanks, Dave

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