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• Why is J2EE scalable?

  - by py213py

  I heard from various sources that J2EE is highly scalable, but to me it seems that you could never scale a J2EE application to the level of the google search engine or any other large website. I would like to hear the technical reasons why it is so scalable.

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• What folders are commonly used by version control systems?

  - by a_m0d

  I need to know what folder names are commonly used by Version Control systems. Many VCSs will create a hidden folder, usually in the top level of the source tree, to store the information that they use. So far, I only know that Git uses .git/ and SVN uses .svn/. What are the folder names that other popular VCSs use?

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• How does one go about writing a virtual MIDI interface?

  - by Alex

  I want to do some funky things with controlling MIDI streams, and I'd like to be able to pipe MIDI input into an application like Ableton or Reason. Presumably this involves some sort of driver level work? Ultimately I'd like to write my application in Python, so if there is some Python-based solution, I'd consider it. I'm perfectly fine with using C/C++, though, so that's not a problem.

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• Zoomed PyGTK image without scale pixbuf

  - by mkotechno

  I want to display a gtk.Image with a high level of zoom, but scale the image to a new pixbuf with the pixfuf methods waste a lot of memory and processor. Are there some simply way to display a zoomed image?

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• Can the location of a WiFi access point be triangulated with the following data?

  - by Gubatron

  Let's say I have 3 or more peers connected to the same WiFi Access Point. If they all give me: - latitude - longitude - their signal level (dBm) in respect to the same WiFi Is this enough data to get the approximate location of the access point?

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• Help me to find a better approach-Design Pattern

  - by DJay

  I am working on an ASP.Net web application in which several WCF services are being used. At client level, I am creating channel factory mechanism to invoke service operations. Right now, I have created an assembly having classes used for channel factory creation code for every service. As per my assumption this is some sort of facade pattern. Please help me to find a better approach or any design pattern, which I can use here.

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• Dell monitors keep blank after initial start

  - by offler

  We have Dell T1650 PCs with 2 nVidia graphic adapters / Windows 7 and 4 attached monitors. At initial start all screens are blank, the computer does not show anything. If powered off by pressing the hardware power button and then restarting all monitors show a picture. The Windows event log shows only the errors, that the machine was shut down unexpectedly. The last entry with blank screen seems to be that user specific dlls for every application are loaded. How can I find out the real problem?

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• Multiple Inheritance Debates II: according to Stroutroup

  - by asksuperuser

  I know very well about the traditional arguments about why Interface Inheritance is prefered to multiple inheritance, there has been already a post here : http://stackoverflow.com/questions/191691/should-c-include-multiple-inheritance But according to Stroutroup the real reason why Microsoft and Sun decided to get rid off multiple inheritance is that they have vested interest to do so: instead of putting features in the languages, they put in frameworks so that people then become tied to their platform instead of people having the same capability at a language standard level. What do you think ?

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• C struct memory layout?

  - by Eonil

  I have C# background. Very newbie to low level language like C. In C#, memory layout by compiler by default, and I have to specify some special attribute to override this behavior for exact layout. As I know, C does not re-align by default. But I heard there's a little re-aligning behavior which very hard to find. Can I know about C's memory layout behavior? (what should be re-aligned and not)

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• "private" directory not accessible in Apache

  - by janeden

  The directory private lives under my DocumentRoot, and despite its name, it should be accessible just like any other dir. But if I add the following RewriteRule to httpd.conf: RewriteRule ^/([^\.]+)$ /$1.html [L] Apache returns 403 for http://server/private/2201. The error log states client denied by server configuration: /private/2201.html If I then rename private to foo, or if I request 2201.html directly, the file is served: 127.0.0.1 - - [21/Nov/2011:10:24:45 +0100] "GET /private/2201 HTTP/1.1" 403 214 127.0.0.1 - - [21/Nov/2011:10:24:58 +0100] "GET /foo/2201 HTTP/1.1" 200 3068 127.0.0.1 - - [21/Nov/2011:10:27:39 +0100] "GET /private/2201.html HTTP/1.1" 200 3068 This is confusing. Is there any special rule for directories named private? If so – why does the direct request for 2201.html work (although the denied request seems to handle the same resource, at least according to the error log entry)?

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• any source code for this kind of ajax game?

  - by Dels

  I tried to find source code for this kind of ajax game: http://www.pitstreet.com/cgi-bin/pitstreet/pitgame.pl?lang=en&game=6&level=5 Some info: The objective is to swap image with another with 3 same images or more in row (vertical or horizontal) Maybe someone willing help me?

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• Lambda functions

  - by Oden

  Hey, I'm really interested in the way of using lambda functions. Does it make sense to use them in a high-level programming language? If yes, why? Is this really just a function embedded in a function (like this) or is there more behind?

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• is using Hosts for resolving a sql-server more performant?

  - by Ice

  Hi, we have a legacy application which uses a access.mdb with hundreds of ODBC-connected tables on a sql-server. the access.mdb contains nothing else than these odbc-connections. Now we consider to use a virtual sql-servername for these odbc connections and resolve it in the local hosts-file with the ip-address of the real sql-server. Like this we can easy switch between a test-sql-database server and the the server for production in changing one single entry in the hosts. EVERYTHING works fine and now comes the question: Could it be that this is more performant because there is one single point on resolving the sql-server (name or ip-address)? Is there something like a network-cache / DNS-Cache? peace Ice

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• Stored Queries?

  - by phpeffedup

  Is it considered crazy to store common SQL queries for my web app in a database for use in execution? Or is that common practice? Or is it impossible? My thinking is, this way, I avoid hard-coding SQL into my application files, and add another level of abstraction. Is this crazy? Is this what a stored procedure is? Or is that something else?

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• Are you able to specify a the profile you want to use in pfexec?

  - by jigjig

  Are you able to specify which profile you want to use for a given user when using pfexec who has been assigned multiple profiles? One example for this use is so that we can execute a command as a different user within the same process. In exec_attr, you are able to specify the uid/gid that will be used to execute a particular command as in the following example entry: Name Service Security:suser:cmd:::/usr/sbin/rpc.nsid:uid=0;gid=0 The above profile will use the super user (uid=0) to execute the rpc.nsid command. In user_attr, you can specify multiple profiles as below: testuser::::type=normal;profiles=Name Service Security,Object Access Management Can you then specify directly to use the Object Access Management profile to pfexec?

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• Destroy Session in an application

  - by Jibu P C_Adoor

  I have several pages in my application. I have used a session variable called "Session["Variable"]" that is set in page1 and page2. That means The scope should be in page1 and page2. If you go out any of these page will clear the above session variable. Is there any solution to clear the particular session varible in the application level. i.e i don't want to write the code for each and every pages...

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• CruiseControl.Net allowForceBuild per project?

  - by user86431

  From reading the docs I can tell that allowForceBuild will turn off the force build button for the server. In my case I have 12 projects. Once is a weekend cleanup task. I want to remove the force build on this one project. Is there a way to turn off the button on a project level? Thanks. -

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• IIS doesn't respond to 127.0.0.1 (external IP works fine)

  - by Jordan

  I have an AWS web server - call it box.company.com. It's running IIS and if I visit http://box.company.com in a web browser (from any machine, including box.company.com), it responds correctly with our site. However, if I visit localhost/ or 127.0.0.1/ when I'm logged into box.company.com, I get a "couldn't connect to host" message. The hosts file has only one entry - the standard "127.0.0.1 localhost" line. Pinging 127.0.0.1 works fine. Pinging localhost correctly resolves to 127.0.0.1 and works fine. I've tried restarting IIS and restarting the DNS Cache. I had this problem once before, and restarting the server fixed it, but I'd like to know what's going on in case this happens again in the future.

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• Restricting access to a subdirectory on linux

  - by David

  I'm looking for a way to make a directory accessible only to its parent directories. That is, suppose you have two directories, A and B, at the same level in the file hierarchy. Now suppose that you have a directory A' which is a subdirectory of A. I'd like to enforce that A is able to access the contents of A' but B is not.

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• Picture changing in vb6

  - by Dario Dias

  I was trying this script from a pdf file.I got stuck where the target image should change to exploding image if clicked but the target image does not change from the standing image.Please Help! Option Explicit Dim fiPlayersScore As Integer Dim fiNumberofMisses As Integer Dim fbTargetHit As Boolean Private Sub Form_Load() Randomize imgTarget.Enabled = False imgTarget.Visible = False cmdStop.Enabled = False lblGameOver.Visible = False lblGameOver.Enabled = False End Sub Private Sub cmdStart_Click() Dim lsUserResponse As String Dim lbResponse As Boolean lsUserResponse = InputBox("Enter a level from 1 to 3." & _ (Chr(13)) & "" & (Chr(13)) & "1 being the Easiest and 3 being the " & _ "Hardest.", "Level Select", "1") lbResponse = False If lsUserResponse = "1" Then Timer1.Interval = 1500 lbResponse = True ElseIf lsUserResponse = "2" Then Timer1.Interval = 1000 lbResponse = True ElseIf lsUserResponse = "3" Then Timer1.Interval = 750 lbResponse = True Else MsgBox ("Game Not Started.") lbResponse = False End If If lbResponse = True Then cmdStart.Enabled = False imgTarget.Picture = imgStanding.Picture frmMain.MousePointer = 5 fbTargetHit = False Load_Sounds cmdStop.Enabled = True fiPlayersScore = 0 fiNumberofMisses = 0 lblScore.Caption = fiPlayersScore lblMisses.Caption = fiNumberofMisses Timer1.Enabled = True lblGameOver.Visible = False lblGameOver.Enabled = False End If End Sub Private Sub cmdStop_Click() Unload_Sounds frmMain.MousePointer = vbNormal Timer1.Enabled = False imgTarget.Enabled = False imgTarget.Visible = False cmdStart.Enabled = True cmdStop.Enabled = False cmdStart.SetFocus lblGameOver.Visible = True lblGameOver.Enabled = True End Sub Private Sub Form_Click() MMControl1.Command = "Play" MMControl1.Command = "Prev" fiNumberofMisses = fiNumberofMisses + 1 lblMisses.Caption = fiNumberofMisses If CheckForLoose = True Then cmdStop_Click lblMisses.Caption = fiNumberofMisses Exit Sub End If End Sub Private Sub imgTarget_Click() MMControl2.Command = "Play" MMControl2.Command = "Prev" Timer1.Enabled = False imgTarget.Picture = imgExplode.Picture '**I AM STUCK HERE** pauseProgram fiPlayersScore = fiPlayersScore + 1 Timer1.Enabled = True If CheckForWin = True Then cmdStop_Click lblScore.Caption = fiPlayersScore Exit Sub End If lblScore.Caption = fiPlayersScore fbTargetHit = True imgStanding.Enabled = False imgTarget.Visible = False imgTarget.Enabled = False Timer1.Enabled = True End Sub Public Sub Load_Sounds() 'Set initial property values for blaster sound MMControl1.Notify = False MMControl1.Wait = True MMControl1.Shareable = False MMControl1.DeviceType = "WaveAudio" MMControl1.FileName = _ "C:\Temp\Sounds\Blaster_1.wav" 'Open the media device MMControl1.Command = "Open" 'Set initial property values for grunt sound MMControl2.Notify = False MMControl2.Wait = True MMControl2.Shareable = False MMControl2.DeviceType = "WaveAudio" MMControl2.FileName = _ "C:\Temp\Sounds\Pain_Grunt_4.wav" 'Open the media device MMControl2.Command = "Open" End Sub Private Sub Timer1_Timer() Dim liRandomLeft As Integer Dim liRandomTop As Integer imgTarget.Visible = True If fbTargetHit = True Then fbTargetHit = False 'imgTarget.Picture = imgStanding.Picture End If liRandomLeft = (6120 * Rnd) liRandomTop = (4680 * Rnd) imgTarget.Left = liRandomLeft imgTarget.Top = liRandomTop imgTarget.Enabled = True imgTarget.Visible = True End Sub Public Function CheckForWin() As Boolean CheckForWin = False If fiPlayersScore = 5 Then CheckForWin = True lblGameOver.Caption = "You Win.Game Over" End If End Function Public Function CheckForLoose() As Boolean CheckForLoose = False If fiNumberofMisses = 5 Then CheckForLoose = True lblGameOver.Caption = "You Loose.Game Over" End If End Function Private Sub Form_QueryUnload(Cancel As Integer, _ UnloadMode As Integer) Unload_Sounds End Sub Public Sub Unload_Sounds() MMControl1.Command = "Close" MMControl2.Command = "Close" End Sub Public Sub pauseProgram() Dim currentTime Dim newTime currentTime = Second(Time) newTime = Second(Time) Do Until Abs(newTime - currentTime) = 1 newTime = Second(Time) Loop End Sub

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• #Define Compiler Directive in C#

  - by pm_2

  In C, I could declare a compiler directive as follows: #define MY_NUMBER 10 However, in C#, I only appear to be able to do this: #define MY_NUMBER Which is obviously useless in this case. Is this correct, or am I doing something wrong? If not, can anyone suggest a way of doing this, either at namespace or solution level? I thought of maybe creating a static class, but that seems to be overkill for one value.

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• how works applications which blocks web sites?

  - by noisy

  I know only one low-level way of blocking websites - hosts file. However, it is obvious that main stream programs has some other way of achieving this. I have an idea for new model of this kind of program, but without possibility of blocking sites it is useless :(

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• Ways to integrate OfBiz and 3rd party webapp

  - by archer

  Thought about RESTAPI, but seems OfBiz does not support it out of the box. Hate accessing domain objects directly (although may be enough for our needs, however, would intercept on Service/ECA level). Any ideas?

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• QuickGraph - How can I associate an Edge with a Class? (i.e. like you can with a Vertex)

  - by Greg

  Hi, Q1 - How can I associate an Edge with a Class? (i.e. like you can with a Vertex) In my case there are various types of edges I want to be able to model. So my real question I guess is how can I associate some level of data with Edges (e.g. edge type). The graph I was looking at using was: http://quickgraph.codeplex.com/wikipage?title=BidirectionalGraph&referringTitle=Documentation thanks

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• Screen lock customization for android

  - by deaviator

  Hi frens I'm planning to explore the possibilities on how to make a screen lock better (like pattern based). It will be great help if someone points out the difficulty level or where to actually start digging. This is going to be my project idea for minor research paper. What do u guys think or if anyone has more ideas worth exploring, I would like to consider it. reagrds

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