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  • show line in exception.message

    - by Crash893
    How would one display what line number caused the error and is this even possible with the way that .net compiles its exes? If not is there an automated way for exception.message to display the sub that crapped out? try { int x = textbox1.text; } catch(exception ex) { messagebox.show(ex.message); }

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  • ASP.NET button click event still firing even through custom server-side validation fails

    - by Josh
    I am having a problem where my button click event is still firing even though my custom server-side validation is set to args.IsValid = false. I am debugging through the code and the validation is definitely being fired before the button click, and args.IsValid is definitely being set to false once the custom validation takes place, but it always makes its way to the button click event afterwards. Any ideas on why this is?

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  • SwingWorker exceptions lost even when using wrapper classes

    - by Ti Strga
    I've been struggling with the usability problem of SwingWorker eating any exceptions thrown in the background task, for example, described on this SO thread. That thread gives a nice description of the problem, but doesn't discuss recovering the original exception. The applet I've been handed needs to propagate the exception upwards. But I haven't been able to even catch it. I'm using the SimpleSwingWorker wrapper class from this blog entry specifically to try and address this issue. It's a fairly small class but I'll repost it at the end here just for reference. The calling code looks broadly like try { // lots of code here to prepare data, finishing with SpecialDataHelper helper = new SpecialDataHelper(...stuff...); helper.execute(); } catch (Throwable e) { // used "Throwable" here in desperation to try and get // anything at all to match, including unchecked exceptions // // no luck, this code is never ever used :-( } The wrappers: class SpecialDataHelper extends SimpleSwingWorker { public SpecialDataHelper (SpecialData sd) { this.stuff = etc etc etc; } public Void doInBackground() throws Exception { OurCodeThatThrowsACheckedException(this.stuff); return null; } protected void done() { // called only when successful // never reached if there's an error } } The feature of SimpleSwingWorker is that the actual SwingWorker's done()/get() methods are automatically called. This, in theory, rethrows any exceptions that happened in the background. In practice, nothing is ever caught, and I don't even know why. The SimpleSwingWorker class, for reference, and with nothing elided for brevity: import java.util.concurrent.ExecutionException; import javax.swing.SwingWorker; /** * A drop-in replacement for SwingWorker<Void,Void> but will not silently * swallow exceptions during background execution. * * Taken from http://jonathangiles.net/blog/?p=341 with thanks. */ public abstract class SimpleSwingWorker { private final SwingWorker<Void,Void> worker = new SwingWorker<Void,Void>() { @Override protected Void doInBackground() throws Exception { SimpleSwingWorker.this.doInBackground(); return null; } @Override protected void done() { // Exceptions are lost unless get() is called on the // originating thread. We do so here. try { get(); } catch (final InterruptedException ex) { throw new RuntimeException(ex); } catch (final ExecutionException ex) { throw new RuntimeException(ex.getCause()); } SimpleSwingWorker.this.done(); } }; public SimpleSwingWorker() {} protected abstract Void doInBackground() throws Exception; protected abstract void done(); public void execute() { worker.execute(); } }

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  • Answered: Selecting even table rows from a table element

    - by mvrak
    The issue I am having is: How do I go from a variable pointing at an element to using CSS selectors? I want to make this work: function highlight(table) {$(table " > :even").toggleClass('highlight');} where table is a reference to a table element. I don't want answers that tell me to use $('#table') because that defeats the point of the generality I am trying to make. Thanks

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  • Javascript .removeChild() only deletes even nodes?

    - by user1476297
    first posting. I am trying dynamically add children DIV under a DIV with ID="prnt". Addition of nodes work fine no problem. However strange enough when it comes to deleted nodes its only deleting the even numbered nodes including 0. Why is this, I could be something stupid but it seem more like a bug. I could be very wrong. Please help Thank you in advance. <script type="text/javascript"> function displayNodes() { var prnt = document.getElementById("prnt"); var chlds = prnt.childNodes; var cont = document.getElementById("content"); for(i = 0; i < chlds.length; i++) { if(chlds[i].nodeType == 1) { cont.innerHTML +="<br />"; cont.innerHTML +="Node # " + (i+1); cont.innerHTML +="<br />"; cont.innerHTML +=chlds[i].nodeName; cont.innerHTML +="<br />"; } } } function deleteENodes() { var prnt = document.getElementById("prnt"); var chlds = prnt.childNodes; for(i = 0; i < chlds.length; i++) { if(!(chlds[i].nodeType == 3)) { prnt.removeChild(chlds[i]); } } } function AddENodes() { var prnt = document.getElementById("prnt"); //Only even nodes are deletable PROBLEM for(i = 0; i < 10; i++) { var newDIV = document.createElement('div'); newDIV.setAttribute("id", "c"+(i)); var text = document.createTextNode("New Inserted Child "+(i)); newDIV.appendChild(text); prnt.appendChild(newDIV); } } </script> <title>Checking Div Nodes</title> </head> <body> <div id="prnt"> Parent 1 </div> <br /> <br /> <br /> <button type="button" onclick="displayNodes()">Show Node Info</button> <button type="button" onclick="deleteENodes()">Remove All Element Nodes Under Parent 1</button> <button type="button" onclick="AddENodes()">Add 5 New DIV Nodes</button> <div id="content"> </div> </body>

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  • Checking if an int is prime more efficiently

    - by SipSop
    I recently was part of a small java programming competition at my school. My partner and I have just finished our first pure oop class and most of the questions were out of our league so we settled on this one (and I am paraphrasing somewhat): "given an input integer n return the next int that is prime and its reverse is also prime for example if n = 18 your program should print 31" because 31 and 13 are both prime. Your .class file would then have a test case of all the possible numbers from 1-2,000,000,000 passed to it and it had to return the correct answer within 10 seconds to be considered valid. We found a solution but with larger test cases it would take longer than 10 seconds. I am fairly certain there is a way to move the range of looping from n,..2,000,000,000 down as the likely hood of needing to loop that far when n is a low number is small, but either way we broke the loop when a number is prime under both conditions is found. At first we were looping from 2,..n no matter how large it was then i remembered the rule about only looping to the square root of n. Any suggestions on how to make my program more efficient? I have had no classes dealing with complexity analysis of algorithms. Here is our attempt. public class P3 { public static void main(String[] args){ long loop = 2000000000; long n = Integer.parseInt(args[0]); for(long i = n; i<loop; i++) { String s = i +""; String r = ""; for(int j = s.length()-1; j>=0; j--) r = r + s.charAt(j); if(prime(i) && prime(Long.parseLong(r))) { System.out.println(i); break; } } System.out.println("#"); } public static boolean prime(long p){ for(int i = 2; i<(int)Math.sqrt(p); i++) { if(p%i==0) return false; } return true; } } ps sorry if i did the formatting for code wrong this is my first time posting here. Also the output had to have a '#' after each line thats what the line after the loop is about Thanks for any help you guys offer!!!

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  • How to use a separate class to validate credit card numbers in C#

    - by EvanRyan
    I have set up a class to validate credit card numbers. The credit card type and number are selected on a form in a separate class. I'm trying to figure out how to get the credit card type and number that are selected in the other class (frmPayment) in to my credit card class algorithm: public enum CardType { MasterCard, Visa, AmericanExpress } public sealed class CardValidator { public static string SelectedCardType { get; private set; } public static string CardNumber { get; private set; } private CardValidator(string selectedCardType, string cardNumber) { SelectedCardType = selectedCardType; CardNumber = cardNumber; } public static bool Validate(CardType cardType, string cardNumber) { byte[] number = new byte[16]; int length = 0; for (int i = 0; i < cardNumber.Length; i++) { if (char.IsDigit(cardNumber, i)) { if (length == 16) return false; number[length++] = byte.Parse(cardNumber[i]); //not working. find different way to parse } } switch(cardType) { case CardType.MasterCard: if(length != 16) return false; if(number[0] != 5 || number[1] == 0 || number[1] > 5) return false; break; case CardType.Visa: if(length != 16 & length != 13) return false; if(number[0] != 4) return false; break; case CardType.AmericanExpress: if(length != 15) return false; if(number[0] != 3 || (number[1] != 4 & number[1] != 7)) return false; break; } // Use Luhn Algorithm to validate int sum = 0; for(int i = length - 1; i >= 0; i--) { if(i % 2 == length % 2) { int n = number[i] * 2; sum += (n / 10) + (n % 10); } else sum += number[i]; } return (sum % 10 == 0); } }

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  • Code to generate random numbers in C++

    - by user1678927
    Basically I have to write a program to generate random numbers to simulate the rolling of a pair of dice. This program should be constructed in multiple files. The main function should be in one file, the other functions should be in a second source file, and their prototypes should be in a header file. First I write a short function that returns a random value between 1 and 6 to simulate the rolling of a single 6-sided die.Second, i write a function that pretends to roll a pair of dice by calling this function twice. My program starts by asking the user how many rolls should be made. Then I write a function to simulate rolling the dice this many times, keeping a count of exactly how many times the values 2,3,4,5,6,7,8,9,10,11,12(each number is the sum of a pair of dice) occur in an array. Later I write a function to display a small bar chart using these counts that ideally would look something like below for a sample of 144 rolls, where the number of asterisks printed corresponds to the count: 2 3 4 5 6 7 8 9 10 11 12 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * Next, to see how well the random number generator is doing, I write a function to compute the average value rolled. Compare this to the ideal average of 7. Also, print out a small table showing the counts of each roll made by the program, the ideal count based on the frequencies above given the total number of rolls, and the difference between these values in separate columns. This is my incomplete code so far: "Compiler visual studio 2010" int rolling(){ //Function that returns a random value between 1 and 6 rand(unsigned(time(NULL))); int dice = 1 + (rand() %6); return dice; } int roll_dice(int num1,int num2){ //it calls 'rolling function' twice int result1,result2; num1 = rolling(); num2 = rolling(); result1 = num1; result2 = num2; return result1,result2; } int main(void){ int times,i,sum,n1,n2; int c1,c2,c3,c4,c5,c6,c7,c8,c9,c10,c11;//counters for each sum printf("Please enter how many times you want to roll the dice.\n") scanf_s("%i",&times); I pretend to use counters to count each sum and store the number(the count) in an array. I know i need a loop (for) and some conditional statements (if) but m main problem is to get the values from roll_dice and store them in n1 and n2 so then i can sum them up and store the sum in 'sum'.

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  • CFBundleVersion error even though new version is higher

    - by Rob
    When trying to upload an upgrade binary to iTunes Connect, I am getting this error message even though I have updated CFBundleVersion in my info.plist file to a higher value (and checked the package contents after building it to be sure it copied over). I have already successfully submitted a different app upgrade by doing this same method, but for whatever reason it won't work this time. Any insights or is this an iTunes bug? The binary you uploaded was invalid. The key CFBundleVersion in the Info.plist file must contain a higher version than that of the previously uploaded version.

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  • ASP.NET Ajax.BeginForm Posts Even If Validation Fails

    - by Acoustic
    I'm just overlooking something simple... but my form, which is an Ajax form, always submits even if the validation fails. I'm not using jQuery validation, just the standard .NET MVC validation. Each of the field failing get show the validation message and highlight the field, but the form just submits anyway. Is there an OnBegin script I can call to prevent the form from submitting if there are errors? Thanks for the help! Ajax.BeginForm("EditUserProfile", new AjaxOptions { HttpMethod = "Post", OnComplete = ToggleViews", UpdateTargetId ="userProfileContainer" })

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  • Webkit and Safari fire mousemove even when mouse doesn't move

    - by Roel
    I've read about issues where the mousemove event is fired twice in Safari/Webkit, but the problem I'm facing is that mousemove fires even when the mouse is not moved. That is: it already fires when the mouse cursor is positioned above the context that the event is attached to when the page is loaded/refreshed. And because I'm attaching it to 'document' (entire viewport of the browser), it fires right away in Safari. I've tried to attach it to to html element, to the body and to a wrapper div. No change. $(document).bind('mousemove', function() { alert('Mouse moved!'); $(document).unbind('mousemove'); }); Is does work ok in other browsers. Anyone seeing what I'm doing wrong? Thanks.

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  • checkins/recent not returning comments or even counts of comments

    - by Gilbert
    My application has been using the checkins/recent endpoint to show where all the current users friends are currently at and I had included a button the user could press to comment on a checkin. The button used to have the comment count on it until recently. It seems the checkins/recent endpoint no longer returns comments or even a comment count for those checkins. I would have to query each checkin in order to get the comment count which adds to the data usage not to mention API usage counts. Is there another way to do this that I'm not seeing? Could you please at least put the comment count back? You have the photo information, why not comments? Thanks

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  • Undefined reference to cmph functions even after installing cpmh library

    - by user1242145
    I am using gcc 4.4.3 on ubuntu. I installed cmph library tools 0.9-1 using command sudo apt-get install libcmph-tools Now, when I tried to compile example program vector_adapter_ex1.c , gcc is able to detect cmph.h library in its include file but is showing multiple errors like vector_adapter_ex1.c:(.text+0x93): undefined reference to cmph_io_vector_adapter' vector_adapter_ex1.c:(.text+0xa3): undefined reference tocmph_config_new' vector_adapter_ex1.c:(.text+0xbb): undefined reference to cmph_config_set_algo' vector_adapter_ex1.c:(.text+0xcf): undefined reference tocmph_config_set_mphf_fd' even though, these are all defined in the source code of the cmph library. Could anyone tell the error that might have occurred or suggest an alternate method to go about building minimal perfect hash functions.

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  • Keep Window Inactive In Appearance Even When Activated

    - by Zach Johnson
    Is there a way to keep a window inactive looking, even if it contains focus? I have two forms (A and B). After the user interacts with A, I transfer focus back to B. The result of the focus transfers (the user clicking on the A, then focus being transferred back to B) is that form A blinks from active to inactive. This looks ugly (especially on Vista where A momentarily gets a bigger shadow). How can I make A stay inactive looking so this blinking will not happen?

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  • Facebook Connect showPermissionDialog callback fires before user can even see the dialog

    - by Chris Hiester
    I'm doing a Facebook Connect integration for a site and when the user logs in, I need to ask for some permissions so I use FB.Connect.showPermissionDialog. I use its callback to see if permissions were granted. If they are granted, I want to submit the form. Here's what my code looks like: $("#form3").live("submit", function() { FB.Connect.showPermissionDialog('email, offline_access', function(perms) { if (!perms) { location.href="http://www.mysite.com/logout/"; return false; } else { save_session(); } }); }); The problem is that the form submits before the user can even see the permission dialog. Has anyone seen this before?

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  • Using RouteExistingFiles to block access to existing files even if no route exists

    - by Michael Stum
    In ASP.net MVC 2, I can use routes.RouteExistingFiles = true; to send all requests through the routing system, even if they exist on the file system. Usually, this ends up hitting the "{controller}/{action}/{id}" route and throws an exception as the controller cannot be found. I do not want to use that route though (I have only a few URLs and they are specifically mapped), yet I would still like to prevent access to the file system. Basically I want to Whitelist pages using IgnoreRoute. Is there a built-in way to do this? My current approach is to still have the "{controller}/{action}/{id}" route and generate a 404 when this is hit, but I'm just wondering if something is built-in already?

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  • My presentation layer does not match my model layer even though I have no animations

    - by Kevin McCullough
    On iPhone I have a CALayer that I animate via Core Animation. Then at some point I change view controllers. I then return to the view controller with the CALayer and in viewWillAppear: I set the frame and position properties on my layer to move it back to its starting point. Setting these properties changes the model layer but the presentation layer still has the old values and its presentation layer does not update until the next animation I play. In the CA Programming guide it says "You can query an instance of CALayer for its corresponding presentation layer while an animation transaction is in process." Which, to me, implies that the presentation layer should only be different from the model layer during an animation. But there are no animations currently running. I even used kCATransactionDisableActions to ensure that when I set the position property an implicit animation is not started. Does anyone know why my presentation and model layers are out of sync? Thanks.

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  • .apk signing fails even with Sun JDK (java.lang.NoClassDefFoundError: com.android.jarutils.DebugKeyP

    - by ianweller
    I'm having an interesting problem signing my Android application, whether or not I'm using a debug key. Regardless of the JDK I have installed to /usr/bin/{java,keytool,jarsigner} (OpenJDK or Sun's JDK) it will always give the following output after compiling successfully: -package-debug-sign: [apkbuilder] Creating RemoteNotify-debug-unaligned.apk and signing it with a debug key... BUILD FAILED /home/ianweller/AndroidSDK/platforms/android-7/templates/android_rules.xml:281: The following error occurred while executing this line: /home/ianweller/AndroidSDK/platforms/android-7/templates/android_rules.xml:152: java.lang.NoClassDefFoundError: com.android.jarutils.DebugKeyProvider The application was built and signed just fine by Eclipse with the ADT plugin (even without Sun's JDK installed). I'm on Fedora 12. I'm wanting to get my code out of Eclipse and move it into a git repository, but being unable to build it from ant will not allow this to happen.

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  • VS 2010 Layer Diagram Validation Error is Showing A Dependency That Doesn't Even Exist (AV0001)

    - by Dan
    I'm getting the following validation error on my layer diagram Error 65 AV0001 : Invalid Dependency : Weld.Interface.Core(Assembly) -- Weld.Interface(Namespace) Layers: Application Framework Core, Application Framework | Dependencies: Namespace Reference D:\Projects\Windows Projects\Weld\Weld\ModelingProject1\Weld.layerdiagram 0 0 ModelingProject1 Weld.Interface.Core: This assembly and namespace does not have a reference to Weld.Interface and only references .NET Framework classes Weld.Interface: This assembly and namespace does not have a reference to Weld.Interface There is no dependancy between these two layers in the dependency diagram. I am confused why I am getting this error. No dependency in the project or code, and no dependency is even setup in the layer diagram. Somehow the Validation logic in the layer diagram is seeing a non existant dependency and saying it is an error. Any ideas what either I might have missed or what is causing this problem?

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  • Object reference error even when object is not null

    - by Shrewd Demon
    hi, i have an application wherein i have incorporate a "Remember Me" feature for the login screen. I do this by creating a cookie when the user logs in for the first time, so next time when the user visits the site i get the cookie and load the user information. i have written the code for loading user information in a common class in the App_Code folder...and all my pages inherit from this class. code for loading the user info is as follows: public static void LoadUserDetails(string emailId) { UsersEnt currentUser = UsersBL.LoadUserInfo(emailId); if (currentUser != null) HttpContext.Current.Session["CurrentUser"] = currentUser; } Now the problem is i get an "Object reference" error when i try to store the currentUser object in the session variable (even though the currentUser object is not null). However the password property in the currentUser object is null. Am i getting the error because of this...or is there some other reason?? thank you

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  • Is -1 a magic number? An anti-pattern? A code smell? Quotes and guidelines from authorities

    - by polygenelubricants
    I've seen -1 used in various APIs, most commonly when searching into a "collection" with zero-based indices, usually to indicate the "not found" index. This "works" because -1 is never a legal index to begin with. It seems that any negative number should work, but I think -1 is almost always used, as some sort of (unwritten?) convention. I would like to limit the scope to Java at least for now. My questions are: What are the official words from Sun regarding using -1 as a "special" return value like this? What quotes are there regarding this issue, from e.g. James Gosling, Josh Bloch, or even other authoritative figures outside of Java? What were some of the notable discussions regarding this issue in the past?

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  • Table/column names enclosed in square brackets, even though their names consist of legal characters

    - by AspOnMyNet
    Square brackets allow you to use names for columns or aliases that contain characters not permitted for column names or aliases. a) I’ve noticed that lots of times table and column names are enclosed inside square brackets, even though their names consist of perfectly legal characters. Why is that? b) As far as I know, square brackets enclosing object’s name aren’t actually a part of that name. Thus, if we create a table named [A]: CREATE TABLE [A] ( … ) we can later reference it without using brackets: SELECT * FROM A But why isn’t the same true when I try to reference a column KEY from a table returned by CONTAINSTABLE function? Namely, if I omit the brackets enclosing column name, I get an error: SELECT ct.KEY FROM CONTAINSTABLE(fullText,*,'some_string') as ct thanx

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  • "No database selected" even when db clearly selected

    - by Someone
    One of my webpages gets a recurring error: "No database selected", even though the DB is selected. Right about now it's a 50-50 chance whether the page will load just fine, or whether I receive this error. After one or two reloads, the page works again. I am including the exact same connection file on my other pages, and I don't have this problem. What could be the cause of this? I'm using ensim pro for webhosting. TIA.

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  • Linenumber for Exception thrown in runtime-compiled DotNET code

    - by David Rutten
    Not quite the same as this thread, but pretty close. My program allows people to enter some VB or C# code which gets compiled, loaded and executed at runtime. My CompilerParams are: CompilerParameters params = new CompilerParameters(); params.GenerateExecutable = false; params.GenerateInMemory = true; params.IncludeDebugInformation = false; params.TreatWarningsAsErrors = false; params.WarningLevel = 4; When this code throws an exception I'd like to be able to display a message box that helps users debug their code. The exception message is easy, but the line-number is where I got stuck. I suspect that in order to get at the line number, I may need to drastically change the CompilerParameters and perhaps even the way these dlls get stored/loaded. Does anyone know the least steps needed to get this to work?

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  • C++ iostream not setting eof bit even if gcount returns 0

    - by raph.amiard
    Hi I'm developping an application under windows, and i'm using fstreams to read and write to the file. I'm writing with fstream opened like this : fs.open(this->filename.c_str(), std::ios::in|std::ios::out|std::ios::binary); and writing with this command fs.write(reinterpret_cast<char*>(&e.element), sizeof(T)); closing the file after each write with fs.close() Reading with ifstream opened like this : is.open(filename, std::ios::in); and reading with this command : is.read(reinterpret_cast<char*>(&e.element), sizeof(T)); The write is going fine. However, i read in a loop this way : while(!is.eof()) { is.read(reinterpret_cast<char*>(&e.element), sizeof(T)); } and the program keeps reading, even though the end of file should be reached. istellg pos is 0, and gcount is equal to 0 too, but the fail bit and eof bit are both ok. I'm running crazy over this, need some help ...

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