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• How best to pre-install OR pre-load OR cache Java Script library to optimize performance.

  - by Kabeer

  Hello. I am working for an intranet application. Therefore I have some control on the client machines. The Java Script library I am using is somewhat big in size. I would like to pre-install OR pre-load OR cache the Java Script library on each machine (each browser as well) so that it does not travel for each request. I know that browsers do cache a Java Script library for subsequent requests but I would like the library to be cached once so all subsequent requests, sessions and users. What is the best mechanism to achieve this?

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• How can something like BOSH be implemented using Java Servlets

  - by John

  BOSH (Bidirectional-streams Over Synchronous HTTP) is a sneaky way of implementing 2-way client-server communication in situations where true server-push is not allowed, most obviously to let a server push data to a browser client without having to use client polling. It works by the client sending a request to the server, and the server doesn't respond immediately... rather it remembers the request but only responds when it has some data to send. When this happens the client immediately sends another request so there is virtually always a 'stored request' sitting on the server ready to push data to the client. At least, that's how I think it works! My question is how you can do this using a Java EE stack i.e standard servlets. I'm rusty with them, is it allowed to send no response and cache the request somehow? If anyone could share (pseudo) code what a servlet class for handling BOSH might look like, I'd be real grateful.

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• Django file uploads - Just can't work it out

  - by phoebebright

  OK I give up - after 5 solid hours trying to get a django form to upload a file, I've checked out all the links in stackoverflow and googled and googled. Why is it so hard, I just want it to work like the admin file upload? So I get that I need code like: if submitForm.is_valid(): handle_uploaded_file(request.FILES['attachment']) obj = submitForm.save() and I can see my file in request.FILES['attachment'] (yes I have enctype set) but what am I supposed to do in handle_uploaded_file? The examples all have a fixed file name but obviously I want to upload the file to the directory I defined in the model, but I can't see where I can find that. def handle_uploaded_file(f): destination = open('fyi.xml', 'wb+') for chunk in f.chunks(): destination.write(chunk) destination.close() Bet I'm going to feel really stupid when someone points out the obvious!

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• The speed of .NET in numerical computing

  - by Yin Zhu

  In my experience, .net is 2 to 3 times slower than native code. (I implemented L-BFGS for multivariate optimization). I have traced the ads on stackoverflow to http://www.centerspace.net/products/ the speed is really amazing, the speed is close to native code. How can they do that? They said that: Q. Is NMath "pure" .NET? A. The answer depends somewhat on your definition of "pure .NET". NMath is written in C#, plus a small Managed C++ layer. For better performance of basic linear algebra operations, however, NMath does rely on the native Intel Math Kernel Library (included with NMath). But there are no COM components, no DLLs--just .NET assemblies. Also, all memory allocated in the Managed C++ layer and used by native code is allocated from the managed heap. Can someone explain more to me? Thanks!

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• python socket.recv/sendall call blocking

  - by fsm

  Hi everyone. This post is incorrectly tagged 'send' since I cannot create new tags. I have a very basic question about this simple echo server. Here are some code snippets. client while True: data = raw_input("Enter data: ") mySock.sendall(data) echoedData = mySock.recv(1024) if not echoedData: break print echoedData server while True: print "Waiting for connection" (clientSock, address) = serverSock.accept() print "Entering read loop" while True: print "Waiting for data" data = clientSock.recv(1024) if not data: break clientSock.send(data) clientSock.close() Now this works alright, except when the client sends an empty string (by hitting the return key in response to "enter data: "), in which case I see some deadlock-ish behavior. Now, what exactly happens when the user presses return on the client side? I can only imagine that the sendall call blocks waiting for some data to be added to the send buffer, causing the recv call to block in turn. What's going on here? Thanks for reading!

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• Downloading PKPass in an iOS custom app from my server

  - by taurus

  I've setup a server which returns a PKPass. If I copy the URL to the browser, a pass is shown (both in my Mac and in my iPhone). The code I'm using to download the pass is the following one: NSData *data = [[NSData alloc] initWithContentsOfURL:[NSURL URLWithString:kAPIPass]]; if (nil != data) { PKPass *pass = [[PKPass alloc] initWithData:data error:nil]; PKAddPassesViewController *pkvc = [[PKAddPassesViewController alloc] initWithPass:pass]; pkvc.delegate = self; [self presentViewController:pkvc animated:YES completion:^{ // Do any cleanup here } ]; } Anyway, when I run this code I have the following error: * Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Only support RGBA or the White color space, this method is a hack.' I don't know what is the bug... The pass seems ok when I download it with Safari and even the code seems ok (there are just 3 simple rows...) Someone experienced with Passkit could help me? EDIT: the weird thing is that the exact same code is working in a fresh new project

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• how to solve this Problem in asp.net crystal report.

  - by Ayyappan.Anbalagan

  Problem in crystal report After excecuting the bellow code,In my report page it ask like "The report you requested requires further information" server= user= password= databse= protected void Page_Load(object sender, EventArgs e) { MySqlConnection sqlcom = new MySqlConnection("server=localhost;userid=root;password=root;database=hemaepdb;"); MySqlCommand cmd = new MySqlCommand("SP_ViewBillDetails", sqlcom); cmd.CommandType = CommandType.StoredProcedure; cmd.Parameters.Add("p_Invoice_Id", MySqlDbType.Int16).Value = 1; cmd.Parameters.Add("p_Org_id", MySqlDbType.Int16).Value = 1; MySqlDataAdapter adapter = new MySqlDataAdapter(cmd); DataSet dsTest = new DataSet(); sqlcom.Open(); adapter.Fill(dsTest, "Table"); sqlcom.Close(); CrystalReportViewer1.Visible = true; ReportDocument myRpt = new ReportDocument(); myRpt.Load(Server.MapPath("CrystalReport.rpt")); myRpt.SetDatabaseLogon("root", "root", "localhost", "hemaepdb"); myRpt.SetDataSource(dsTest); CrystalReportViewer1.ReportSource = myRpt; }

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• Trying to verify understanding of foreign keys SQL Server

  - by msarchet

  So I'm working on just a learning project to expose myself to doing some things I do not get to do at work. I'm just making a simple bug and case tracking app (I know there are a million this is just to work with some tools I don't get to). So I was designing my database and realized I've never actually used Foreign Keys before in any of my projects, I've used them before but never actually setting up a column as a FK. So I've designed my database as follows, which I think is close to correct (at least for the initial layout). However When I try to add the FK's to the linking Tables I get an error saying, "The tables present in the relationship must have the same number of columns". I'm doing this by in SQLSMS by going to the Keys 'folder' and adding a FK. Is there something that I am doing wrong here, I don't understand why the tables would have to have the same number of columns for me to add a FK relationship between the tables?

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• Why does this window object not have the eval function?

  - by Motti

  I ran into an interesting (?) problem in the YUI rich edit demo on IE. When looking at the window object for the content editable frame used as the browser I see that the eval function is undefined (by running the following). javascript:alert(document.getElementById("editor_editor").contentWindow.eval) This only happens on IE (I checked on IE6 and IE8), and it doesn't happen on Firefox or Chrome. All the other window functions and properties seem to be in order, now I realise that eval is not really defined on the window but on the global object but my understanding was that in browsers the window is the global object (also eval does appear on all other windows so why not on this one?). Does anyone know if this is a know bug/limitation in IE and how I can get to eval in the context of the global object of this frame? (I need the side effects to be available to anything running from within this frame).

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• Viewing Code Coverage Results outside of Visual studio

  - by Wonchance

  I've got some unit tests, and got some code coverage data. Now, I'd like to be able to view that code coverage data outside of visual studio, say in a web browser. But, when I export the code coverage to an xml file, I can't do anything with it. Are there readers out there for this? Do I have to write an xml parser and then display it how I want it (seems like a waste since visual studio already does this.) Seems kinda silly to have to take a screenshot of my code coverage results as my "report" Suggestions?

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• How do i make my text wrap in a <div> with a large border radius

  - by Greg Guida

  in the following code <html> <body> <div style="height:400px; width:400px; -moz-border-radius:100px; -webkit-border-radius:100px; border:3px solid #500; background-color:#a00; overflow:hidden;"> Why is this getting cut at the beginning??? </div> </body> </html> Why isn't the browser wrapping the text around the rounded corners. In webkit browsers(i tested both chrome and safari) the overflow hidden cuts the text outside the border. Firefox just renders text outside the border. I also tried this without overflow:hidden; but again the text just rendered outside the border.

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• Active printer problem in Printing word document through VB.net

  - by sweety

  Hi My printer name is \\abc\First Floor A-Block its taking name \abc\First Floor A-Block on NE04:. How should i print it Private oWord As Word.Application Dim lobjDoc As Word.Document Dim strFolder as String Dim pd As New PrintDocument Dim strPrintername as String oWord = CreateObject("Word.Application") oWord.DisplayAlerts = Word.WdAlertLevel.wdAlertsNone oWord.ActivePrinter =strPrintername strFolder="D:\testdoc.prn" ' Here I am giving the printer name which is on network, But its taking name \abc\First Floor A-Block on NE04: lobjDoc = oWord.Documents.Open(CType(strFolder, Object)) lobjDoc.PageSetup.FirstPageTray = Word.WdPaperTray.wdPrinterAutomaticSheetFeed lobjDoc.PageSetup.OtherPagesTray = Word.WdPaperTray.wdPrinterAutomaticSheetFeed lobjDoc.PrintOut(Background:=False, Append:=False, OutputFileName:=strFolder, PrintToFile:=True) 'here its giving error about printer settings lobjDoc.Close(SaveChanges:=False) Is there any way to print word document with all its content through PrintDocument? thanks

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• How do I change a Git remote HEAD to point to something besides "master"

  - by jhs

  Short version: How do I set a Git remote's HEAD ref to point to something besides "master"? My project has a policy not to use a "master" branch (all branches are to have meaningful names). Furthermore, the canonical master repository is only accessible via ssh://, with no shell access (like GitHub or Unfuddle). My problem is that the remote repository still has a HEAD reference to refs/heads/master, but I need it to point to a different branch. This is causing two problems: When cloning the repo, there this, warning: remote HEAD refers to nonexistent ref, unable to checkout. That's confusing and inconvenient. The web-based code browser depends on HEAD as a basis for browsing the tree. I need HEAD to point to a valid branch, then.

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• IE8 won't load JavaScript file in "Compatibility View."

  - by Don Jones

  Here's my JS insert: <script type="text/javascript" src="include/profile.js"></script> In IE8 with "Compatibility View," the file never loads. The first line in the file is a simple alert() call, so that I know it loaded. Change the browser to Standards View, and it loads fine. Also, if I add: <meta http-equiv="X-UA-Compatible" content="IE=100" > It forces to Standards View and it loads fine. Any idea why this would be the case? I've not been able to test against IE7, but I know the JS file also does not load in IE6. Right now the tag is in the section of the file.

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• How to access the jQuery event object in a Seaside callback

  - by Mef

  Basically, I want to translate the following into Seaside Smalltalk: $(".myDiv").bind('click', function(e) { console.log(e); }); Besides that I don't want to console.log the event, but access it in my ajax callback. The most promising approach seemed to be something like html div onClick: (html jQuery ajax callback: [:v | self halt] value: (???); with: 'Foo'. But I couldn't find any way to access the event that caused the callback. Intuitively, I would try html jQuery this event for the ??? part, but the Seaside jQuery wrapper doesn't know any message that comes close to event. Any help is appreciated. There has to be away to access the event data...

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• How do I pan the contents of a div when the right mouse button is dragged?

  - by Shaunwithanau

  I need a cross browser way of capturing the right mouse click, preventing the default context menu and making it where when the user drags the mouse they can pan the contents of a div. This is largely similar to Google maps in that they will grip the contents and drag to see what they want. No external libraries please. I am already capturing the events, and know that this will prevent default actions: if (evt.preventDefault) { evt.preventDefault(); } else { evt.returnValue = false; } But this doesn't prevent the context menu AFAIK. Edit: I really am unsure about how to prevent the context menu and what the best way to manipulate the scroll bars would be? examples would be great

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• Visual Studio 2008 - Focus on textbox doesn't work when run from VS2008 as admin

  - by Steve

  This is a minor, esoteric problem and not a showstopper, but I'm wondering what other VS2008 idiosyncrasies are out there. If you make a web app, add a textbox and run a focus function for the textbox on page load, it works when you run VS not as administrator from a Vista non-administrator account or if you run the page from a browser instance run on its own, not from VS. If you browse the page from VS as Admin, the focus doesn't work. This for Cassini and from the local IIS. Stuff like this just makes me trust VS a tad less.

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• What to name a method

  - by coffeeaddict

  I'm debating what to name this method. CloseCashTransaction(Cash.Id, -1, true); or CompleteCyberCashTransaction(Cash.Id, -1, true); or neither are good? In business terms/process by sending in these 3 values I'm essentially "closing the transaction" or "completing the transaction" in our workflow. However on the developer side, I cant' infer wtf "Complete" or "Close" means. It forces me to look into the internals of the method. My struggle is that I try to name methods to infer what they are doing. Complete is just way too general and forces the consumer of the method to dive into the code every time I use words like this. When I see stuff like this all over code, I have to take so much time to figure out what they are actually doing. And if the comments suck, I end up having to look at all logic in that method because the comments nor the method name really infer what's going on.

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• Dynamic Midi generation and playback on Android: Possible?

  - by Peterdk

  Strangely I find no support for Midi in Android. The only thing that comes close is the Jetplayer, but this only takes a existing .jet file. I want to dynamically generate a midi file with some intervals and play it. I even thought about just manually creating a .jet file with a tone and then transposing it with the jet player, but it limits the transposing to -12, +12. Which is not so good for me. There also is a ToneGenerator on Android, but it's limited to predefined tones with no way to transpose. Does someone know how to achieve midi generation and playback on Android?

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• Simple image server

  - by Joel

  I have a bunch of images that I need others to browse via a web browser in pretty much the same way as Apache-Gallery. I'd be able to dump all my images in a directory so that users hitting: http://server:port/directory would see small thumbnails and selecting an image would load it full size on a page with options to browse the previous or next image. I'm looking for a non Apache solution, much like the wonderfull Python simple http server, that can be launched anywhere with minimal configuration & fuss e.g. python -m SimpleHTTPServer 8000 In fact, the python solution above is pretty much want I want except it doesn't thumbnail the images but just a simple directory listing. Happy to use an app written in any common language so long as it is self contained and can run on linux on a custom port (and to re-iterate, not an Apache module).

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• Dealing with ISO-encoding in AJAX requests (prototype)

  - by acme

  I have a HTML-page, that's encoded in ISO-8859-1 and a Prototype-AJAX call that's build like this: new Ajax.Request('api.jsp', { method: 'get', parameters: {...}, onSuccess: function(transport) { var ajaxResponse = transport.responseJSON; alert(ajaxResponse.msg); } }); The api.jsp returns its data in ISO-8859-1. The response contains special characters (German Umlauts) that are not displayed correctly, even if I add a "encoding: ISO-8895-1" to the AJAX-request. Does anyone know how to fix this? If I call api.jsp in a new browser window separately the special characters are also corrupt. And I can't get any information about the used encoding in the response header. The response header looks like this: Server Apache-Coyote/1.1 Content-Type application/json Content-Length 208 Date Thu, 29 Apr 2010 14:40:24 GMT Notice: Please don't advice the usage of UTF-8. I have to deal with ISO-8859-1.

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• PHP and Javascript Webservice

  - by ajithperuva

  By using javascript am trying to cal a webservice.That service return response as follows.. <envelope> <date_time> Test', callbackTest Wednesday, March 31, 2010 2:28:55 AM </date_time> </envelope> I am using firefox as browser to execute the application.Thats why after creating the object of XMLHttpRequest try to read as follows _xmlDoc.responseXML.getElementsByTagName('date_time')[0].firstChild.nodeValue; But it is showing output like undefined.please help me to solve this problem.What is actual problem ?

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• Coldfusion: download PDF

  - by dmr

  I have a URL that opens a PDF: <cfoutput>http://myUrl.cfm?params=#many#<cfoutput> I would like to enable my users to download that PDF instead of having it open in the browser. I've been trying the following, and it isn't working: <cfoutput> <cfcontent type="application/pdf" file="http://myUrl.cfm?params=#many#"/> <cfheader name="content-diposition" value="attachment; filename='http://myUrl.cfm?params=#many#'"> <cflocation url= "http://myUrl.cfm?params=#many#"/> </cfoutput> What am I doing wrong?

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• Socket Bind Error

  - by rantravee

  Hi, I have a test application that opens a socket , sends something through this socket and then closes it . This is done in a loop for 5-10.000 times. The thing is that after 3,4000 iterations I get an error of this type : enter code here java.net.BindException: Address already in use: connect I even set the socket to be used immediattly, but the error persists enter code here try { out_server.write(m.ToByteArray()); socket_server.setReuseAddress(true); socket_server.close(); } catch(Exception e) { e.printStackTrace(); System.out.println(i+" unable to register with the server"); } What could I do to fix this ?

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• Why am I getting unexpected output trying to write a hash structure to a file?

  - by Harm De Weirdt

  I have a hash in which I store the products a customer buys (%orders). It uses the product code as key and has a reference to an array with the other info as value. At the end of the program, I have to rewrite the inventory to the updated version (i.e. subtract the quantity of the bought items) This is how I do rewrite the inventory: sub rewriteInventory{ open(FILE,'>inv.txt'); foreach $key(%inventory){ print FILE "$key\|$inventory{$key}[0]\|$inventory{$key}[1]\|$inventory{$key}[2]\n" } close(FILE); } where $inventory{$key}[x] is 0 → Title, 1 → price, 2 → quantity. The problem here is that when I look at inv.txt afterwards, I see things like this: CD-911|Lady Gaga - The Fame|15.99|21 ARRAY(0x145030c)||| BOOK-1453|The Da Vinci Code - Dan Brown|14.75|12 ARRAY(0x145bee4)||| Where do these ARRAY(0x145030c)||| entries come from? Or more important, how do I get rid of them?

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