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• Simple Properties in Objective-C Classes

  - by tarnfeld

  Hey, I've bene working with Objective-C for a while now, and so far I have never really needed to craft my own classes, properly. I am a bit confused with the two arguments you can give the @property(a, b) declaration in a header file. When creating outlets to Interface Builder I usually do @property(nonatomic, retain) but I have no idea what this means. I'm writing a simple class which has a set of properties which will be set from the outside, like [instance setName:@"Bla Bla Bla"]; or I guess like instance.name = @"Bla@" but I would rather the first option. How would I declare this kind of property on a class? Thanks in advanced! Sorry for the n00bish question :-)

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• Neither IE or Firefox respects the control values that are output

  - by Luke Rohde

  I'm writing a survey designer asp.net mvc. It has buttons to move questions up and down. The buttons post the whole form back and the affected questions are swapped on the server. When the form returns the only thing that is changed are the values for each survey question. Both firefox and IE seem to ignore this change. Nothing is persisted to the database (until save) and url doesn't change so the post just returns the same view but I've stepped through my code to ensure the sequence of values being rendered in the view reflects the swap which is ok. However "view - source" doesn't show the change suggesting caching issue (maybe auto complete). I've tried autocomplete="off" in my form. Response.Cache.SetNoStore(); in my global.asax [System.Web.Mvc.OutputCache(NoStore = true, Duration = 0, VaryByParam = "*")] before my controller and the following in my page header NOTHING!!! This must be real common. Anyone got a clue?

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• What should a PHP generate to give back to a jQuery AJAX request?

  - by Alex Mcp

  Perhaps it's a syntax error, but I never assume that. I have a -dead- simple AJAX test set up: http://www.mcphersonindustries.com/bucket/api.php is a file with simply: <?php echo "test"; ?> And I have Apache as localhost with this jQuery bit running: $(document).ready(function() { function doAjaxPost() { $.ajax({ type: "POST", url: "http://www.mcphersonindustries.com/bucket/api.php", data: "null", success: function(resp){ console.log("Response: '" + resp + "'"); }, error: function(e){ console.log('Error: ' + e); } }); } doAjaxPost(); }); So Firebug spits out Response: '' each time, but nothing's coming through the request. Do I need to declare a header in PHP? Am I making a boneheaded mistake somewhere? Thanks for the insights, as always.

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• Question about migrating from ASP .NET User Controls to .NET 3.5 Master Page technology

  - by Jim McFetridge

  When migrating from an ASP .NET user control -based page with a header, footer, and menu to a Master Page using the same HTML mark-up, is it normal for CSS or javascript behaviors to change slightly? In particular, the submenu bar text now appears run together (which looks like a CSS symptom) and the graphics on the line above it appear to have an incorrect z-order. (The menu operation is javascript-based.) (I tried to paste images here but couldn't.) Also, the site is very large and we've not been given permission to redo the menu for the entire site. This is a forward-only migration. (Because I know that someone will ask.) Assuming that there are no changes in scope, what are the things that I should check? Thanks! Jim

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• Opening Visual Studio created XAML in Expression Blend

  - by Jens A.

  I have created a console application using Visual Studio 2008. In a few cases, this application shows a WPF dialog. Now, the design view of Visual Studio is a little limited, so I'd like to edit this dialog using Expression Blend 3. Blend does not seem to have an option to load individual XAML files, and when I open my solution in Blend, only the XAML code is displayed when I try to edit the dialog. Edit: I've noticed, that no IntelliSense is available in the text view either. When I create a new WPF Project inside Blend, and copy my dialog there (overwriten MainWindows.xaml), I get a design view. What do I have to do to actually get a design view here? Thank! =) Edit: Header of my XAML file: <Window xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" x:Class="QuantumAnalysis.Deployment.Activation.Checker.MainWindow" x:Name="Window" Title="MainWindow" HorizontalAlignment="Right" Width="600" SizeToContent="Height">

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• Amazon EC2 Load Balancer: Defending against DoS attack?

  - by netvope

  We usually blacklist IPs address with iptables. But in Amazon EC2, if a connection goes through the Elastic Load Balancer, the remote address will be replaced by the load balancer's address, rendering iptables useless. In the case for HTTP, apparently the only way to find out the real remote address is to look at the HTTP header HTTP_X_FORWARDED_FOR. To me, blocking IPs at the web application level is not an effective way. What is the best practice to defend against DoS attack in this scenario? In this article, someone suggested that we can replace Elastic Load Balancer with HAProxy. However, there are certain disadvantages in doing this, and I'm trying to see if there is any better alternatives.

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• XCode newbie: How to find the source code for standard or system libraries?

  - by Jan Hettich

  XCode newbie question here: If I'm programming in C++ or objective C, and I #include or #import a library; e.g. #include <iostream> #import <Cocoa/Cocoa.h> I'm often not sure where to look for these header files in the directory structure on my Mac. In other development environments, you can right click the included or imported filename and have the option to jump to source. Is there such a feature in XCode? Also, for the standard C++ libraries and the Cocoa framework, is the source code for the implementation files available, or only the headers together with compiled link libraries? Thanks!

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• PHP Redirect problem with subdomain

  - by gms8994

  I'm using PHP to redirect a page back to the previous page with the following: header("Location: {$_SERVER['HTTP_REFERER']}"); This set of pages will only be used by internal users, so I'm not terribly concerned about the fact that the referer will not always be available. The problem I'm running in to is that if the referer looks like http://subdomain.domain.com/test.php?id=13, the redirect ends up going to http://subdomain.domain.com/.domain.com/test.php?id=13. Notice the additional .domain.com/ in the url. I've tested by hardcoding the value, and it causes the problem as well. phpMyAdmin seems to suffer the same issue, but only on this particular server. If this is not an SO question, please move accordingly.

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• Xcode 4.2 how include one project into another one?

  - by Alex Stone

  I keep searching, but cannot find a clear and simple explanation on how to include one XCode project, along with all of it's sub-classes into another project. I routinely see stuff like that in sample projects that I download off the web, but do not know how to do this myself. Within XCode, along with .h and .m files, and folders, there's a whole new project, starting with a blue xcode project icon, that is expandable to contain everything within the project. Please, can someone explain to me step by step what do I need to do to add one XCode project into another one? I've seen a ton of one liners like "header search paths", but that does not tell me much. UPDATE: After re-reading the documentation, I realized that the project to include must be dragged ONTO the BLUE project icon of the parent project. Regular sources can be dragged anywhere, but a project must be dragged onto a project. Thank you!

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• Web Service URL change is not recognized

  - by ila

  I deployed in a production environment a .net solution that consumes a web service added as "Service reference" in visual studio. Today the endpoint URL has changed, and I modified that URL in web.config. But when I run the solution I get the error: System.ServiceModel.FaultException: Server did not recognize the value of HTTP Header SOAPAction: http://93.62.150.200/LogEvent. Now that sound strange to me. As you can see, the IP is 93.62.... but the new value is different. The web.config entry (with the new value or the URL) is: <client> <endpoint address="http://213.92.50.215/sawfc/WS_SAWFC_Int.asmx" binding="basicHttpBinding" bindingConfiguration="wsSAWFCInterfaceSoap" contract="it.datasphere.ws.wsSAWFCInterfaceSoap" name="wsSAWFCInterfaceSoap" /> </client> I cannot reach the new web service from dev environment, so I cannot modify the Service reference there. Any idea? Thanks a lot!

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• Learn mp3 format and audio signal processing

  - by Shankhoneer Chakrovarty

  I am trying to learn the following things: How mp3 file looks like internally? I found this: http://mpgedit.org/mpgedit/mpeg_format/MP3Format.html but it seems old. Is there any recent changes to the format? I couldnt find any. How to open a mp3 file in java and look for bytes? I tried using audiostream but I am getting a lot of zeros and signed short integers which nowhere resemble the header/body format as mentioned in the above link. Am I wrong in interpreting the bytes? How to get amplitude, frequency and pitch of a mp3 file? No idea. Can you please suggest some book or tutorial? Can you please help me in getting the solution for the above questions? I am sorry if some questions appear to be naive, I am a just begun to learn mp3. Thanks

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• Cannot Extend Django 1.2.1 Admin Template

  - by jcady

  I am attempting to override/extend the header for the Django admin in version 1.2.1. However when I try to extend the admin template and simply change what I need documented here: http://docs.djangoproject.com/en/dev/ref/contrib/admin/#overriding-vs-replacing-an-admin-template), I run into a recursion problem. I have an index.html file in my project's templates/admin/ directory that starts with {% extends "admin/index.html" %} But it seems that this is referencing the local index file (a.k.a. itself) rather than the default Django copy. I want to extend the default Django template and simply change a few blocks. When I try this file, I get a recursion depth error. How can I extend parts of the admin? Thanks.

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• Can I get the matched DOM string with PHP and DOMDocument?

  - by alex

  I've got my HTML inside of $html. dom = new DOMDocument(); $dom->loadHTML($html); $xpath = new DOMXPath($dom); $tags = $xpath->query('//div[@id="header"]'); foreach($tags as $tag) { var_dump($tag->nodeValue); // the innerHTML of that element var_dump($tag); // object(DOMElement)#3 (0) { } } Is there a way to get that node, or remove it? Basically, I'm parsing an existing website and need to remove elements from it. What method do I call to do that? Thanks

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• How to embed images in a single HTML / PHP file?

  - by Tatu Ulmanen

  Hi, I am creating a lightweight, single-file database administration tool and I would like to bundle some small icons with it. What is the best way to embed images in a HTML/PHP file? I know a method using PHP where I would call the same file with a GET parameter that would output hardcoded binary data with the correct header, but that seems a bit complicated. Can I use something to pass the image directly in a CSS background-image declaration? This would allow me to utilize the CSS sprite technique. Browser support isn't an issue here, so more exotic methods are welcome also. EDIT Does someone have a link/example to how to generate Data URL's properly with PHP? I'd figure echo 'data:image/png;base64,'.base64_encode(file_get_contents('image.png')) would suffice but I could be wrong.

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• Creating and debugging a Sharepoint Services 3.0 WebPart

  - by Filip Ekberg

  I am trying to create a WebPart for my locally installed Sharepoint Services 3.0 and I've followed various tips and guides to get it all working. However somewhere on the road I must have missed something or this is just not "in all the books". When creating an empty Sharepoint WebPart and just hitting F5 to debug it, I get the following message: Error 1 The HTTP request is unauthorized with client authentication scheme 'Negotiate'. The authentication header received from the server was 'Negotiate,NTLM'. 0 0 And as this article from microsoft suggests I did enable Negotiate, NTLM. But it's still not working, Any suggestions?

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• How to deserialize null array to null in c#?

  - by Aen Sidhe

  Here is my class: public class Command { [XmlArray(IsNullable = true)] public List<Parameter> To { get; set; } } When I serialize an object of this class: var s = new XmlSerializer(typeof(Command)); s.Serialize(Console.Out, new Command()); it prints as expected (xml header and default MS namespaces are omitted): <Command><To xsi:nil="true" /></Command> When I took this xml and tried to deserialize it I got stucked, because it always print "Not null": var t = s.Deserialize(...); if (t.To == null) Console.WriteLine("Null"); else Console.WriteLine("Not null"); How to force deserializer to make my list null, if it is null in xml?

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• How does SharePoint identify a new email to a Discussion Board as belonging to a thread?

  - by glenatron

  Pretty much as the title really, I want to be able to create a new thread from a reply to an old thread, perhaps by adding a "New Thread: " or similar to the title of the message, but of course Sharepoint is using some other characteristics of the message to recognise messages as replies to other messages and I can't find what those are. Does anyone know? Is it just using the In-Reply-To header? Alternatively, is there already a standard way to get the outcome I'm looking for, of a new discussion thread regardless of whether the initial email is a reply to a current discussion or not?

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• [Rais] OAuth with Digg API

  - by Karl

  I'm attempting to get Rails to play nice with the Digg API's OAuth. I'm using the oauth gem (ruby one, not the rails one). My code looks approximately like this: @consumer = OAuth::Consumer.new(API_KEY, API_SECRET, :scheme => :header, :http_method => :post, :oauth_callback => "http://locahost:3000", :request_token_url => 'http://services.digg.com/1.0/endpoint?method=oauth.getRequestToken', :access_token_url => 'http://services.digg.com/1.0/endpoint?method=oauth.getAccessToken', :authorize_url => 'http://digg.com/oauth/authorize') @request_token = @consumer.get_request_token session[:request_token] = @request_token.token session[:request_token_secret] = @request_token.secret redirect_to @request_token.authorize_url Which is by-the-book in terms of what the gem documentation gave me. However, Digg spits a "400 Bad Request" error back at me when @consumer.get_request_token is called. I can't figure out what I'm doing wrong. Any ideas?

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• OS X contains heapsort in stdlib.h which conflicts with heapsort in sort library

  - by CryptoQuick

  I'm using Ariel Faigon's sort library, found here: http://www.yendor.com/programming/sort/ I was able to get all my code working on Linux, but unfortunately, when trying to compile with GCC on Mac, its default stdlib.h contains another heapsort, which unfortunately results in a conflicting types error. Here's the man page for Apple heapsort: http://developer.apple.com/library/mac/#documentation/Darwin/Reference/ManPages/man3/heapsort.3.html Commenting out the heapsort in the sort library header causes a whole heap of problems. (pardon the pun) I also briefly thought of commenting out my use of stdlib.h, but I use malloc and realloc, so that won't work at all. Any ideas?

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• How do I add a combo box to a DataGrid?

  - by FigBug

  I want to add a ComboBox to a DataGrid. So far, the only way I've found to do it is like this: <mx:DataGridColumn headerText="Header" dataField="src" > <mx:itemRenderer> <mx:Component> <mx:ComboBox dataProvider="{data.srcChoices}" /> </mx:Component> </mx:itemRenderer> </mx:DataGridColumn> The problem is the initial value of the ComboBox isn't set correctly. If I hard code the choices, then the initial value is set correctly. I can't hard code the choices. Any idea what I should do?

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• Qt: Writing plugins for other applications

  - by Rasmus Faber

  I am writing a plugin for another application. I want to support the plugin on multiple platforms, so I am strongly considering using Qt. The plugin needs to be able to show some basic GUI. The plugin interface does not in any way handle GUI - it is just a simple DLL/shared library specified with a C-header file. Can I use Qt inside such a shared library? The calling application might or might not be using Qt itself. Any hints on what to do? Do I need to run a QApplication event-loop in a separate thread? Or can I just call the event-loop myself while waiting for input? (I only need modal dialogs).

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• How to avoid duplication entry via form into database

  - by DAFFODIL

  <?php $con = mysql_connect("localhost","root",""); if (!$con) { die('Could not connect: ' . mysql_error()); } mysql_select_db("form", $con); $reb = "select count(*) from customer where name = '$name';" if (mysql_result($reb,0) > 0) { echo "Item Already Added!<br>"; } else { // add the item } mysql_close($con); header( 'Location: http://localhost/cus.php' ); ?> Parse error: parse error in C:\wamp\www\c.php on line 10

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• XHR FF POST size limit

  - by usurper

  Hi, My XHR POST REQUEST is cut off. When I try to reload my page information is missing. Firebugs sends following message: ... Firebug request size limit has been reached by Firebug. ... My question is: What are my options? Would it work if I declare the content.length in the header? I added a line to my apache config file and restarted it: LimitRequestBody 0 I increased the size of transfer files in mysql config file Or it is a browser issue? The only solution I could think of was to cut the data in pieces and transmit the array one by one but I don't like this idea. The content length is 91691 according to firebug. Any suggestions?

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• implement code folding for a report with jquery

  - by Vignesh

  I'm trying to collapse or expand table rows with + and - sign displayed on the first column, using jquery. <script type="text/javascript"> $(document).ready(function() { $("tr.header").click(function () { $("tr.child", $(this).parent()).slideToggle("fast"); }); }); I'm trying to use this code. But I want the child of the parent I'm clicking on alone to be toggled. Any ideas on how to do it?

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• SL4 - Binding DataGridTextColumn to a property

  - by Brent

  I have a DataGrid. In the DataGrid's AutoGeneratingColumn event I have some code that looks like this: if (e.Property.Name.Contains("MetaData")) { var descCol = new DataGridTextColumn(e.Property); var bnd = new Binding("Description"); bnd.Mode = BindingMode.TwoWay; descCol.Binding = bnd; e.Column = descCol; e.Column.Header = "Description"; return; } The column binds to a type MetaData which has a string property named Description that I would like displayed in my DataGrid. So far I've been unable to get the value of the Description property to display in my DataGrid. I think the path I am passing into the Binding constructor might be incorrect. I've tried "MetaData.Description" as well and it doesn't work either. Can anyone help me properly set up the binding on my DataGridTextColumn?

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