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Articles indexed in March 2010

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  • How to write a technical blog?

    - by Gutzofter
    I have a blog that I would like to increase traffic on. I've read lots of technical blogs, but it's a lot different writing a blog versus reading a blog. There seems to be several ways to write a post. General article: I like this tool. This is how I do it. Specific technical issue: Programming solutions. I do get some traffic, but they don't leave any comments. Should I use HN and Reddit. What are some of the other places I can promote my blog? How to respond to negative comments (trolls)? Another thing is you might want to have some link-thrus. comment on other peoples blog posts. BTW my blog is: (defun ugly-lisp-code () ()) New Blog ugly web development

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  • how to embed flash that is trying to access xml in it's original folder.

    - by mkprogramming
    I've got various flash files stored on my server. For this exmaple - here is the directory structure: Files Example - example.swf - example.xml So then on a separate webpage stored in the root of my server.. i'm embeding the flash. ... <param name="movie" value="http://www.example.com/Files/Example/example.swf"> ... Now the issue comes. Because the .swf is trying to access example.xml ... which is NOT stored in the root directory. How can I fix this problem? (I'd rather not use an iframe)

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  • When is it safe to do a Response.Redirect() without throwing an exception?

    - by DDechant
    I have an intermediary class extending System.Web.UI.Page for all of my pages that require authentication. The class mostly does custom authentication handling. When a user with insufficient access attempts to visit a page, I try to redirect the user back to the login page while preventing any further page events from being executed (ie. Page_load). The first solution that came to mind was the default implementation of Response.Redirect. Of course the downside to this is the possibility of ThreadAbortExceptions being thrown. So my question is this: When (if at all) during the page life cycle is it actually safe to execute Response.Redirect() without ThreadAbortException ever being thrown? public class CustomPage : System.Web.UI.Page { protected override void OnInit(EventArgs e) { base.OnInit(e); if (!IsValid()) Response.Redirect("login.aspx", true); } }

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  • How do you manipulate form values based off local input?

    - by dmanexe
    I have a form that has a series of check boxes and some line items have a text input next to them that defines quantity of the item. <input type="checkbox" name="measure[][input]" value="<?=$item->id?>"> <input class="item_mult" type="text" name="measure[][input]" /> What is the best way to capture the integer from the input field and have it correspond to the check box so I can use it to calculate the total later on?

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  • Exception calling remote SOAP call from thread

    - by Duncan
    This is an extension / next step of this question I asked a few minutes ago. I've a Delphi application with a main form and a thread. Every X seconds the thread makes a web services request for a remote object. It then posts back to the main form which handles updating the UI with the new information. I was previously using a TTimer object in my thread, and when the TTimer callback function ran, it ran in the context of the main thread (but the remote web services request did work). This rather defeated the purpose of the separate thread, and so I now have a simple loop and sleep routine in my thread's Execute function. The problem is, an exception is thrown when returning from GetIMySOAPService(). procedure TPollingThread.Execute; var SystemStatus : TCWRSystemStatus; begin while not Terminated do begin sleep(5000); try SystemStatus := GetIMySOAPService().GetSystemStatus; PostMessage( ParentHandle, Integer(apiSystemStatus), Integer(SystemStatus), 0 ); SystemStatus.DataContext := nil; LParam(SystemStatus) := 0; except end; end; end; Can anyone advise as to why this exception is being thrown when calling this function from the thread? I'm sure I'm overlooking something fundamental and simple. Thanks, Duncan

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  • Convincing Management to use WCF

    - by Kyle Rozendo
    Hi All, I asked another question, stating that the I am unable to use WCF in a new Web Service project and have come to see that it seems to be the technology to use in regards to extensibility and security. My question is a simple one: How can I persuade management (and developers for that matter) to move over to using WCF as opposed to other web service technologies (ASMX/CFC)? They won't be concerned with a comparison between the types (especially with regard to ASMX), simply what there is to gain. Thanks for your time, Kyle

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  • PHP - How can I check if return() was called from an include()'d file?

    - by John Himmelman
    How can I tell if return() was called from within the included file. The problem is that include() returns 'int 1', even if return() wasn't called. Here is an example... included_file_1.php <?php return 1; included_file_2.php <?php echo 'no return here, meep'; main.php <?php $ret = include('included_file_1.php'); // This file DID return a value, int 1, but include() returns this value even if return() wasn't called in the included file. if ($ret === 1) { echo 'file did not return anything'; } var_dump($ret); $ret = include('included_file_2.php'); // The included file DID NOT return a value, but include() returns 'int 1' if ($ret === 1) { echo 'file did not return anything'; } var_dump($ret);

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  • Does throwing an exception in an EvalFunc pig UDF skip just that line, or stop completely?

    - by Daniel Huckstep
    I have a User Defined Function (UDF) written in Java to parse lines in a log file and return information back to pig, so it can do all the processing. It looks something like this: public abstract class Foo extends EvalFunc<Tuple> { public Foo() { super(); } public Tuple exec(Tuple input) throws IOException { try { // do stuff with input } catch (Exception e) { throw WrappedIOException.wrap("Error with line", e); } } } My question is: if it throws the IOException, will it stop completely, or will it return results for the rest of the lines that don't throw an exception? Example: I run this in pig REGISTER myjar.jar DEFINE Extractor com.namespace.Extractor(); logs = LOAD '$IN' USING TextLoader AS (line: chararray); events = FOREACH logs GENERATE FLATTEN(Extractor(line)); With this input: 1.5 7 "Valid Line" 1.3 gghyhtt Inv"alid line"" I throw an exceptioN!! 1.8 10 "Valid Line 2" Will it process the two lines and will 'logs' have 2 tuples, or will it just die in a fire?

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  • Positioning child panels using FlowLayout

    - by extro
    I have two panels: main_panel child_panel The main_panel layout is set using: main_panel.setLayout(flowlayout) I then added child_panel to main_panel: main_panel.add(child_panel) The child_panel gets added to main_panel but its position is at the cross-section of horizontal midpoint and top vertical section of screen. I want child_panel to be at the top left corner, something I could have done by using child_panel.setlocation(a,b) method, if I have set the layout of main_panel as null. I have used FlowLayout here because I want components in the JPanel to keep adjusting with the size of JFrame. So can I add child_panel to main_panel at the exact location I want, even if I set the Layout of main_panel as not null?

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  • How do I save an object that contains and EntitySet?

    - by Pete
    Say I have an User (mapped to a User table) and the Edit view (in MVC) displays a multiselectlist of Modules (mapped to a Modules table) that user can access, with the Modules pre-selected based on the User's EntitySet of Modules. I have tried saving the User then deleting all User_Modules manually and adding them back based on what's selected on submit, but the User has a null EntitySet for User.User_Modules. I cannot find the correct way to handle this scenario anywhere online. Can anyone help?

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  • How to create a status bar icon on the right side? (Android)

    - by yuku
    Notification and NotificationManager are used to create icons to be placed on the top-left position of the screen. A Notification also need to have an entry on the status bar pull-down. However, icons on the right side such as the battery, signal strength, wireless indicators do not need any entry on the status bar. How do I make such icons without any entry in the status bar pull-down?

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  • Using LINQ to find a common prefix?

    - by Roger Lipscombe
    I've got two sequences: IEnumerable<string> x = new[] { "a", "b", "c" }; IEnumerable<string> y = new[] { "a", "b", "d", "e" }; I'd like to find the common prefix of these two sequences (i.e. "a", "b"). Is there a succinct way to do this in LINQ? Bear in mind that these aren't really IEnumerable<string>; they're IEnumerable<PathComponent>, where I have an implementation of IEqualityComparer<PathComponent>.

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  • Escaping CURL @ symbol with PHP

    - by bkildow
    I'm writing a php application that submits via curl data to sign up for an iContact email list. However I keep getting an invalid email address error. I think this may be due to the fact that I'm escaping the @ symbol so it looks like %40 instead of @. Also, according to the php documentation for curl_setopt with CURLOPT_POSTFIELDS: The full data to post in a HTTP "POST" operation. To post a file, prepend a filename with @ and use the full path. So, is there anyway to pass the @ symbol as post data through curl in php without running it through urlencode first?

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  • Scipy sparse... arrays?

    - by spitzanator
    Hey, folks. So, I'm doing some Kmeans classification using numpy arrays that are quite sparse-- lots and lots of zeroes. I figured that I'd use scipy's 'sparse' package to reduce the storage overhead, but I'm a little confused about how to create arrays, not matrices. I've gone through this tutorial on how to create sparse matrices: http://www.scipy.org/SciPy_Tutorial#head-c60163f2fd2bab79edd94be43682414f18b90df7 To mimic an array, I just create a 1xN matrix, but as you may guess, Asp.dot(Bsp) doesn't quite work because you can't multiply two 1xN matrices. I'd have to transpose each array to Nx1, and that's pretty lame, since I'd be doing it for every dot-product calculation. Next up, I tried to create an NxN matrix where column 1 == row 1 (such that you can multiply two matrices and just take the top-left corner as the dot product), but that turned out to be really inefficient. I'd love to use scipy's sparse package as a magic replacement for numpy's array(), but as yet, I'm not really sure what to do. Any advice? Thank you very much!

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  • jquery isn't working properly when an iframe is present.

    - by mkprogramming
    I'm developing a simple jQuery shopping cart and have a message box fade in when the item has been added correctly. $("#results_info").html(''); $("#results_info").fadeIn(); $("#results_info").html(data); setTimeout(function() { $("#results_info").fadeOut(); }, 5000); If I have an iframe on this page. I have to hover over the iframe object before the fade will happen... not sure why? Any ideas?

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  • SendMessage vs. WndProc

    - by Poma
    I'm trying to extend TextBox control to add watermarking functionality. The example I've found on CodeProject is using imported SendMessage function. [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = false)] static extern IntPtr SendMessage(IntPtr hWnd, uint Msg, uint wParam, [MarshalAs(UnmanagedType.LPWStr)] string lParam); void SetWatermark() { SendMessage(this.Handle, 0x1501, 0, "Sample"); } I'm wondering why not use protected WndProc instead void SetWatermark() { var m =new Message() { HWnd = this.Handle, Msg = 0x1501, WParam = (IntPtr)0, LParam = Marshal.StringToHGlobalUni("Sample") }; WndProc(ref m); } Both seem to work fine. Almost all examples I've seen on internet use SendMessagefunction. Why is that? Isn't WndProc function designed to replace SendMessage? P.S. I don't know right to convert string to IntPtr and found that Marshal.StringToHGlobalUni works ok. Is it right function to do this?

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  • Using JQuery with dynamically added controls (MVC)

    - by Mario
    I have a set of radio buttons that are dynamically generated (via JSON call): StringBuilder sbEligAll = new StringBuilder(); sbEligAll.Append("<div id='currentselectiondepartment'>"); sbEligAll.Append(" <input type='radio' name='selectalldepartment' id='radCurrent' value='0' /><label for='radCurrent'>Current</label>"); sbEligAll.Append(" <input type='radio' name='selectalldepartment' id='radFuture' value='1' /><label for='radFuture'>Future</label>"); sbEligAll.Append(" <input type='radio' name='selectalldepartment' id='radCurrentAll' value='2' /><label for='radCurrentAll'>Current All</label>"); sbEligAll.Append(" <input type='radio' name='selectalldepartment' id='radFutureAll' value='3' /><label for='radFutureAll'>Future All</label>"); sbEligAll.Append("</div>"); Then: return Json(new { TableList = sbElig.ToString() }, JsonRequestBehavior.AllowGet); Is there a way to get jQuery to be able to interact with these? For example: $("input[name=selectalldepartment]").change(function() { var str = $('input[name=selectalldepartment]:checked').val(); $(".radiolist[value='" + str + "']").attr("checked", true); }); I've tried everything I know how to do, but the jQuery just doesnt fire. (I've added alerts to the jQuery code to see if it actually gets called, and it does not). Any thoughts?! Thanks!

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  • Who broke the build?

    - by Martin Hinshelwood
    I recently sent round a list of broken builds at SSW and asked for them to be fixed or deleted if they are not being used. My colleague Peter came back with a couple of questions which I love as it tells me that at least one person reads my email I think first we need to answer a couple of other questions related to builds in general.   Why do we want the build to pass? Any developer can pick up a project and build it Standards can be enforced Constant quality is maintained Problems in code are identified early What could a failed build signify? Developers have not built and tested their code properly before checking in. Something added depends on a local resource that is not under version control or does not exist on the target computer. Developers are not writing tests to cover common problems. There are not enough tests to cover problems. Now we know why, lets answer Peters questions: Where is this list? (can we see it somehow) You can normally only see the builds listed for each project. But, you have a little application called “Build Notifications” on your computer. It is installed when you install Visual Studio 2010. Figure: Staring the build notification application on Windows 7. Once you have it open (it may disappear into your system tray) you should click “Options” and select all the projects you are involved in. This application only lists projects that have builds, so don’t worry if it is not listed. This just means you are about to setup a build, right? I just selected ALL projects that have builds. Figure: All builds are listed here In addition to seeing the list you will also get toast notification of build failure’s. How can we get more info on what broke the build? (who is interesting too, to point the finger but more important is what) The only thing worse than breaking the build, is continuing to develop on a broken build! Figure: I have highlighted the users who either are bad for braking the build, or very bad for not fixing it. To find out what is wrong with a build you need to open the build definition. You can open a web version by double clicking the build in the image above, or you can open it from “Team Explorer”. Just connect to your project and open out the “Builds” tree. Then Open the build by double clicking on it. Figure: Opening a build is easy, but double click it and then open a build run from the list. Figure: Good example, the build and tests have passed Figure: Bad example, there are 133 errors preventing POK from being built on the build server. For identifying failures see: Solution: Getting Silverlight to build on Team Build 2010 RC Solution: Testing Web Services with MSTest on Team Build Finding the problem on a partially succeeded build So, Peter asked about blame, let’s have a look and see: Figure: The build has been broken for so long I have no idea when it was broken, but everyone on this list is to blame (I am there too) The rest of the history is lost in the sands of time, there is no way to tell when the build was originally broken, or by whom, or even if it ever worked in the first place. Build should be protected by the team that uses them and the only way to do that is to have them own them. It is fine for me to go in and setup a build, but the ownership for a build should always reside with the person who broke it last. Conclusion This is an example of a pointless build. Lets be honest, if you have a system like TFS in place and builds are constantly left broken, or not added to projects then your developers don’t yet understand the value. I have found that adding a Gated Check-in helps instil that understanding of value. If you prevent them from checking in without passing that basic quality gate of “your code builds on another computer” then it makes them look more closely at why they can’t check-in. I have had builds fail because one developer had a “d” drive, but the build server did not. That is what they are there to catch.   If you want to know what builds to create and why I wrote a post on “Do you know the minimum builds to create on any branch?”   Technorati Tags: TFS2010,Gated Check-in,Builds,Build Failure,Broken Build

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  • using ftp or webdav?

    - by ajsie
    if i want to mount remote folders in my mac and use them as a local one, should i use webdav over ftp? basically, i have read that webdav is better than ftp (old protocol). does this mean that i should never use ftp and only webdav?

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