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  • What if I made an explicit reference to 'this' for use inside an inner class?

    - by badp
    So far, I've used this approach to access this from the scope of an inner class: class FooManagementWindow extends JFrame { JButton rejectFoo; //... void getFooAcceptingPanel(){ //... final FooManagementWindow referenceToThis = this; rejectFoo = new JButton("Reject"); rejectFoo.addEventListener(new EventListener() { @Override public void actionPerformed(ActionEvent arg) { referenceToThis.setEnabled(false); //this requires a network call //... referenceToThis.setEnabled(true); //the user may resume his work } }); //... } } However, I just learned that instead of declaring referenceToThis, a direct reference is kept for me as: FooManagementWindow.this I have no reason to think my less standard approach may lead to errors or weird corner cases. Or are there?

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  • javascript singleton question

    - by Shawn
    I just read a few threads on the discussion of singleton design in javascript. I'm 100% new to the Design Pattern stuff but as I see since a Singleton by definition won't have the need to be instantiated, conceptually if it's not to be instantiated, in my opinion it doesn't have to be treated like conventional objects which are created from a blueprint(classes). So my wonder is why not just think of a singleton just as something statically available that is wrapped in some sort of scope and that should be all. From the threads I saw, most of them make a singleton though traditional javascript new function(){} followed by making a pseudo constructor. Well I just think an object literal is enough enough: var singleton = { dothis: function(){}, dothat: function(){} } right? Or anybody got better insights? [update] : Again my point is why don't people just use a simpler way to make singletons in javascript as I showed in the second snippet, if there's an absolute reason please tell me. I'm usually afraid of this kind of situation that I simplify things to much :D

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  • Design review - do you think I'm doing this the right way? First commercial project for me!

    - by Sergio Tapia
    I'm tasked with designing an application that will allow a person to scan a legal document, save that associated with a Name and save it to a database. Now, inside of the Organization, there are many departments, and each department can have many sub departments. Problem lies in that some larger organizations will have many departments and smallers ones will only have 1 or two. I've though about creating a Department table and a Supdepartment table to create associations, etc. That way it's extensible and users can dynamically create departments to fit my program to their organizational scheme. Am I approaching this the right way? As I said, this is my first commercial application so I want to do it right and set a name for myself for delivering things on time and good code for other to expand upon.

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  • How to program three editions Light, Pro, Ultimate in one solution

    - by Henry99
    I'd like to know how best to program three different editions of my C# ASP.NET 3.5 application in VS2008 Professional (which includes a web deployment project). I have a Light, Pro and Ultimate edition (or version) of my application. At the moment I've put all in one solution with three build versions in configuration manager and I use preprocessor directives all over the code (there are around 20 such constructs in some ten thousand lines of code, so it's overseeable): #if light //light code #endif #if pro //pro code #endif //etc... I've read in stackoverflow for hours and thought to encounter how e.g. Microsoft does this with its different Windows editions, but did not find what I expected. Somewhere there is a heavy discussion about if preprocessor directives are evil. What I like with those #if-directives is: the side-by-side code of differences, so I will understand the code for the different editions after six months and the special benefit to NOT give out compiled code of other versions to the customer. OK, long explication, repeated question: What's the best way to go?

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  • RPC Fails but passing in SQL Man. Studios works

    - by Justin
    I am calling a stored procedure from a web service in an ASP.Net application. And until a few days ago, all was well. However now when i call it I get an error saying The timeout period elapsed prior to the completion of the operation or the server could not be reached. However when i would run SQL SERVER PROFILER, I could see that the call was getting to the database, but was timing out. I then copied the statement being executed found at the bottom of the Profiler and pasted it into Management Studio and executed it and it finishes in about 7 seconds.. This runs just fine on our production server. It seems to be similar to this question: SELECT DISTINCT not working in .NET application, but works in SQL Mgmt Studio but I see no answer.

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  • Getting notification / listener when action is performed (chimpChat / monkeyrunner tool)

    - by Dr. AtZe
    I want to get a notification if someone has performed an action in an android app from outside of the app. I don't want to make any (android) code changes. To do the actions I use the Chimpchat.jar, the .jar that the monkeyrunner tool uses. To be clear: Can I get a notification or register listeners on components from outside of the app? e.g. Run my android app My java application links into the device with chimpChat via the adb The user touches a button My java application gets a notification what was performed = am I able to get that information? If not, am I able to get the information on which position the tab was? Hopefully it's clear what I want to do. Thanks, soeren

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  • Doing extra initialisations on a MFC Dialog in Visual Studio C++ 2008 Pro

    - by theunanonim
    How do I make extra initializations on a modal dialog before calling DoModal(); ? The whole application is created using VS wizards. I have a main Dialog (the one that is created automatically when I select new MFC Application in Visual Studio 2008 Professional). When I click a button on this dialog I want to open another dialog and set a CString value into a CEdit control. my code: ... void MainDlg::OnClickedButtonX(){ SecondDialogClass Dlg2; Dlg2.asocVar2Cedit.SetWindowTextW(L"my text"); Dlg2.DoModal(); } //asocVar2Cedit is the associeted control variable to the //CEdit control on the second Dialog (Right Click > Add Variable.. in VSC++) ... this code generates at runtime a "Debug Assertion" error in winocc... Any ideas ? Thank you in advance.

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  • Android: automatically choose debug/release Maps api key?

    - by tomash
    Is it possible to automatically detect, which certificate was used for signing APK? I'd like to have both debug and release Maps certificates in application and pass valid one to MapView constructor. With such setup I will not make mistake while releasing application - I'm using debug certificate on emulator and my device, then sign with release one before sending app to Market. I was thinking about detecting my particular device or whether debugger is connected but it is not perfect. Maybe some file marking need for debug certificate? Is there any better way?

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  • C# Image.Clone to byte[] causes EDIT.COM to open on Windows XP

    - by JayDial
    It appears that cloning a Image and converting it to a byte array is causing EDIT.COM to open up on Windows XP machines. This does not happen on a Windows 7 machine. The application is a C# .NET 2.0 application. Does anyone have any idea why this may be happening? Here is my Image conversion code: public static byte[] CovertImageToByteArray(Image imageToConvert) { imageToConvert.Clone() as Image; if(clone == null) return null; imageToConvert.Dispose(); byte[] imageByteArray; using (MemoryStream ms = new MemoryStream()) { clone.Save(ms, clone.RawFormat); imageByteArray = ms.ToArray(); } return imageByteArray; } public static Image ConvertByteArrayToImage(byte[] imageByteArray, ImageFormat formatOfImage) { Image image; using ( MemoryStream ms = new MemoryStream(imageByteArray, 0, imageByteArray.Length)) { ms.Write(imageByteArray, 0, imageByteArray.Length); image = Image.FromStream(ms, true); } return image; } Thanks Justin

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  • Parsing NSXMLNode Attributes in Cocoa

    - by Jeffrey Kern
    Hello everyone, Given the following XML file: <?xml version="1.0" encoding="UTF-8"?> <application name="foo"> <movie name="tc" english="tce.swf" chinese="tcc.swf" a="1" b="10" c="20" /> <movie name="tl" english="tle.swf" chinese="tlc.swf" d="30" e="40" f="50" /> </application> How can I access the attributes ("english", "chinese", "name", "a", "b", etc.) and their associated values of the MOVIE nodes? I currently have in Cocoa the ability to traverse these nodes, but I'm at a loss at how I can access the data in the MOVIE NSXMLNodes. Is there a way I can dump all of the values from each NSXMLNode into a Hashtable and retrieve values that way? Am using NSXMLDocument and NSXMLNodes.

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  • Redirect URL from AJAX Calls

    - by Vincent
    All, I have an application written in Zend MVC Framework. So, naturally all regular requests and ajax requests go through /public/index.php. I want my application to support maintenance mode. So, in my index.php file, I have the following code: if( Zend_Registry::get('config')->maintenance == 'true' ) { header('Location:/maintenance.php'); } The issue is, when ajax requests are called they render servermaintenance.php inside the page instead of redirecting to this page. How can I make sure it gets redirected instead of getting rendered? Thanks

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  • C# external tool for SSMS - Reading from stdin

    - by jheppinstall
    Hi all, I am trying to write an app that makes use of the external tools functionality of SQL Server Management Studio. To specify an external tool, you can enter a path to the app and specify some arguments to pass to the app via STDIN. Currently I just have a form that displays the arguments. Every time I run the external tool I get a new instance of the application. Ideally I would like for the first time I run the tool to load the application, and each subsequent running to take the arguments from STDIN and do something with them WITHOUT creating a new instance of the app. Is there anything I can do that could allow this, or am I stuck with lots of windows? Thanks in advance

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  • Is there any Prototype Javascript function similar to Jquery Live to trace dynamic dom elements?

    - by Wbdvlpr
    Hi Event.observe(window,"load",function() { $$(".elem_classs").findAll(function(node){ return node.getAttribute('title'); }).each(function(node){ new Tooltip(node,node.title); node.removeAttribute("title"); }); }); Using above method, I can retrieve all elements having ".elem_class" and apply some javascript functions on them. But I have a modal/popup box which has some elements also having ".elem_class" and these dont get in the scope of findAll/each as they are loaded into the dom thru ajax. How do I apply the same to dynamically loaded elements as well? I am using Prototype Library. (I have used JQuery's Live function which keeps track of all future elements, but need to achieve something similar using Prototype) Thanks.

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  • Undelete a contact in outlook

    - by Alister
    I have an application written in Delphi that adds / updates contacts in outlook. The problem I'm having is that if the contact has been deleted in Outlook, the code still finds the contact and updates it - and the contact still remains deleted. Is there a way I can determine if the contact is deleted or undelete the contact? Roughly the code looks something like: OutlookApp := CreateOleObject('Outlook.Application'); Mapi := OutlookApp.GetNameSpace('MAPI'); //..... try if ContactOutlookEntryID.AsString <> '' then aContact := Mapi.GetItemFromID(ContactOutlookEntryID.AsString); except end; //try to locate the contact if they have been synchro'd before if VarIsEmpty(aContact) then //if not found aContact := Contacts.Items.Add(2); //add a new contact to outlook aContact.LastName := ContactSurname.AsString; //.....

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  • Multiple Post Requests Occuring in Quick Succession

    - by Samuel
    This is a bit of an open ended question but we have a problem with a web application that on the final step of completing an order, multiple post requests are being made, sometimes up to 10 and all within a couple of seconds to the page. Theirs nothing unusual about the page, the user fills out a form which is then validated using the jQuery form validation plugin. We've seen this behavior exhibited over a couple of different browser types, notably IE6 but also IE8. We've also managed to trigger the bug ourselves but nothing out of the ordinary seems to occur on the browsers end, everything progresses as normal. Apache logs show that multiple post requests where made at the same time and the Rails logs show that multiple posts requests were also received by the application, leading me to think it's a problem with the browser. I've exhausted all avenues that I can think of for debugging so I'm throwing this out there to see if anyone has some ideas of what we could try or look for next.

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  • I'm looking for a constraint to prevent the insert of an empty string in MySQL

    - by Marga Keuvelaar
    Ok, in this question I learned how to prevent the insert of a NULL value. But, unfortunately, an empty string is being inserted anyway. Apart from preventing this on the PHP side, I'd like to use something like a database constraint to prevent this. Of course a check on the application side is necessary, but I'd like it to be on both sides. I am taught that whatever application is talking to your database, it should not be able to insert basically wrong data in it. So... CREATE TABLE IF NOT EXISTS tblFoo ( foo_id int(11) NOT NULL AUTO_INCREMENT, foo_test varchar(50) NOT NULL, PRIMARY KEY (foo_id) ); Would still allow me to do this insert: INSERT INTO tblFoo (foo_test) VALUES (''); Which I would like to prevent.

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  • How to replace&add the dataframe element by another dataframe in Python Pandas?

    - by bigbug
    Suppose I have two data frame 'df_a' & 'df_b' , both have the same index structure and columns, but some of the inside data elements are different: >>> df_a sales cogs STK_ID QT 000876 1 100 100 2 100 100 3 100 100 4 100 100 5 100 100 6 100 100 7 100 100 >>> df_b sales cogs STK_ID QT 000876 5 50 50 6 50 50 7 50 50 8 50 50 9 50 50 10 50 50 And now I want to replace the element of df_a by element of df_b which have the same (index, column) coordinate, and attach df_b's elements whose (index, column) coordinate beyond the scope of df_a . Just like add a patch 'df_b' to 'df_a' : >>> df_c = patch(df_a,df_b) sales cogs STK_ID QT 000876 1 100 100 2 100 100 3 100 100 4 100 100 5 50 50 6 50 50 7 50 50 8 50 50 9 50 50 10 50 50 How to write the 'patch(df_a,df_b)' function ?

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  • create a folder and files in c:\program files\myApp\data in windows 7

    - by ile
    I have an old c++ application that needs to be modified to work with windows 7. Problem is in creating a new folder and saving a file in that folder. This folder should be created in c:\program files\myApp\data\newFolder. This is function I use to create new folder and get errors: if(!CreateDirectory(pathSamples,NULL)) //Throw Error { DWORD errorcode = GetLastError(); LPVOID lpMsgBuf; FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, NULL, errorcode, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (LPTSTR)&lpMsgBuf, 0, NULL ); MessageBox(NULL, (LPCTSTR)lpMsgBuf, TEXT("Error"), MB_OK); } In XP this works, but in Windows 7 it doesn't. If I run application as administrator than the folder is created, otherwise "Access is denied" error is thrown. My question is following: Is there an option to make changes to the code so that the folder can be created in "program files" nad that files can be saved in this folder? PS I saw this thread already but it doesn't answer my question. Thanks, Ilija

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  • Proper design a Model-Controller in Cocoa?

    - by legege
    Hi, I'm trying to design a simple Cocoa application and I would like to have a clear and easy to understand software architecture. Of course, I'm using a basic MVC design and my question concerns the Model layer. For my application, the Model represents data fetched on the Internet with a XML-RPC API. I'm planning to use Core Data to represent a locally fetched version. How should the data be loaded initially? I'm reading the Cocoa Design Pattern book, and they talk about a Model-Controller that is centric to the Model. How would that be done? Thanks!

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  • Python/Tkinter make a custom window

    - by user1435947
    I want to make a window without the top taskbar (that is movable), so there is only thin outline around the GUI box. I also want to add my own 'X' to the box. import Tkinter class Application(Frame): def __init__(self, master=None): Frame.__init__(self, master) self.parent = master ............ def main(): root = Tk() root.attributes('-fullscreen', True) root.geometry('500x250+500+200') app = Application(root) app.parent.configure(background = 'gray32') root.resizable(width=FALSE, height=FALSE) app.mainloop() main() I tried forcing the box to resize after going into fullscreen to remove the taskbar, though box is no longer movable. Any suggestions? [I have seen this thread: Python/Tkinter: Removing/disabling a resizable window's maximize button under Windows The -toolwindow attribute didn't work for me, maybe because I use linux...]

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  • Lazy Registration: How to let a guest user start their workflow and prompt registration when they tr

    - by Brandon Cordell
    I'm wondering what I would do to go about letting a guest use my web application without registering, then if they attempt to save their work they are prompted with a registration. This will be in a rails application by the way. Can I just allow public access to part of the work flow, then when they save check if they're a registered user (by session value, or cookie?). If they aren't a registered user, save all their work into the session and let them fill out a sign out form. On successful registration automatically log them in and initiate the create on the db?

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  • Using member variables inherited from a templated base class (C++)

    - by Aaron Becker
    I'm trying to use member variables of a templated base class in a derived class, as in this example: template <class dtype> struct A { int x; }; template <class dtype> struct B : public A<dtype> { void test() { int id1 = this->x; // always works int id2 = A<dtype>::x; // always works int id3 = B::x; // always works int id4 = x; // fails in gcc & clang, works in icc and xlc } }; gcc and clang are both very picky about using this variable, and require either an explicit scope or the explicit use of "this". With some other compilers (xlc and icc), things work as I would expect. Is this a case of xlc and icc allowing code that's not standard, or a bug in gcc and clang?

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  • How does java LoginContext.login() work?

    - by tangens
    I have this code to create a configuration of a java client to connect to a JBoss application server: System.setProperty( "java.security.auth.login.config", "auth.conf" ); LoginContext auth = new LoginContext( "myAuth", new LoginCallbackHandler( username, password ) ); auth.login(); The file auth.conf contains the following lines: myAuth { org.jboss.security.ClientLoginModule required; }; Now, somewhere else in the code (the LoginContext auth isn't known there) I have an EJB that does a initialContext.lookup( jndiName ) and a narrow() to access a Bean on the JBoss application server. This narrow only succeeds if the login information of the first step was correct. Question How does the login information propagate from the LoginContext to the narrow()? I don't see any connection between these two places. And further, how could I do two or more different logins inside of one client?

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  • Tabcontainer in Master Page not working as expected

    - by henrico
    Isn't TABCONTAINER supposed to be used in a MASTERPAGE? I started building my application in a single .aspx page with a tabcontainer to separate the different features in the application. My idea was to later break it up into individual pages with less code in each of them. I thought the use of a masterpage would be the perfect solutions... of course, this didn't work as expected. The problem is that all tabs, except the one related to the page loaded, for example tab1.aspx, are empty. If tab2.aspx is loaded, only tab2 is filled and so on. Is this a known bug or by design?

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