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• How to sort in-place using the merge sort algorithm?

  - by eSKay

  I know the question is too open. All I want is someone to tell me how to convert a normal merge sort into an in-place merge sort (or a merge sort with constant extra space overhead). All I can find (on the net) is pages saying "it is too complex" or "out of scope of this text". "The only known ways to merge in-place (without any extra space) are too complex to be reduced to practical program." (from here) Even if it is too complex, can somebody outline the basic concept of how to make the merge sort in-place?

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• Javascript cross-domain web request fails with Status=0?

  - by Tav

  Yes, I know the following code does not work in IE. I know IE expects me to use XDomainRequest() instead. I don't care about that. This is firefox only. I'm trying to do a cross-domain web request in firefox javascript. I keep getting a status of 0. Does anyone know why? var url = "http://newyork.craigslist.org"; var xdr = new XMLHttpRequest(); //Yes, I know IE expects XDomainRequest. Don't care xdr.onreadystatechange = function() { if (xdr.readyState == 4) { alert(xdr.status); //Always returns 0! And xdr.responseText is blank too } } xdr.open("get", url, true); xdr.send(null); Shouldn't that work?

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• Black berry: Getting NULL string for exception message.

  - by vikram deshpande

  I used code given but I am getting "IOCancelledException" and "IOException". And IOCancelledException.getMessage() / IOException.getMessage() giving null string, it does not give error message. Please help me understaing reason. class SMSThread extends Thread { Thread myThread; MessageConnection msgConn; String message; String mobilenumber; public SMSThread( String textMsg, String mobileNumber ) { message = textMsg; mobilenumber = mobileNumber; } public void run() { try { msgConn = (MessageConnection) Connector.open("sms://+"+ mobilenumber); TextMessage text = (TextMessage) msgConn.newMessage(MessageConnection.TEXT_MESSAGE); text.setPayloadText(message); msgConn.send(text); msgConn.close(); }catch (IOCancelledException ioce){ System.out.println("IOCancelledException: " + ioce.getMessage()); }catch(IOException ioe){ System.out.println("IOException: " + ioe.getMessage()); } catch (Exception e) { System.out.println("Exception: " + e); } } }

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• XDocument holding onto Memory?

  - by Jon

  I have an appplication that does a XDocument.Load from a 20mb file and then gets passed to a form to view its contents: openFileDialog1.FileName = ""; if (openFileDialog1.ShowDialog() == DialogResult.OK) { AuditFile = XDocument.Load(openFileDialog1.FileName); fmAuditLogViewer AuditViewer = new fmAuditLogViewer(); AuditViewer.ReportDocument = AuditFile; AuditViewer.Init(); AuditViewer.ShowDialog(); AuditViewer.Dispose(); AuditFile.RemoveNodes(); AuditFile = null; } In Task Manager I can see the memory being used by my application shoot up when I open this file. When I have finished viewing this file in my application I call : myXDocument.RemoveNodes(); myXDocument = null; However the memory use in Task Manager is still pretty high against my app. Is the XDocument still being held in memory and can I decrease the memory usage by my app?

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• Alternative for PHPlivedocx?

  - by Derek

  Hello, Is there any other free alternatives to PHPliveDocx? I would like to create a Word document based on templates and user inputted data. The template will resides on the server and the client(online or c# windows application) will be used to collect user input. Once data has been collected, server-side script(PHP) will be used to generate a Word document. So far I have only found phplivedocx. However I'm not very comfortable at consuming web services from a server that I have no control over with (am I worrying too much?). I have also thought about using client to do the work (c# windows application, Open Office XML). But I'm not sure that's the right way of doing things. Any guidance/help will be really appreciated! Thanks!

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• How can I embed firefox in a GUI application?

  - by PeniWize

  Has anyone ever embedded the firefox web browser technology in their own [unmanaged] C/C++ GUI application in the same way that IE can be embedded as a COM object? (I would like to do this on Linux, not Windows). Are there "better" alternatives to firefox? I'm open to anything as long as I can use it with non-GPL code. My needs are fairly basic; I only need fundamental HTML parsing and display of static local files, but I'd take advantage of more sophisticated technology, if I can get it. I'd like to be able to use JavaScript, but I can get by without it.

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• How can I track a bug report in Apple’s Radar?

  - by zoul

  Hello! There’s a feature I’d like to use on iOS. It has already been requested on Radar and people from Apple say that they will probably implement it. Is there a way to get to the particular bug report in Radar so that I can watch the progress? I know I can’t see other people’s bug reports on Radar. What if I file a duplicate bug report, will that let me know when the original bug closes? I know about Open Radar, but the request in question is not there.

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• java.io.IOException: Server returned HTTP response code: 403 for URL

  - by Adao

  I want to download the mp3 file from url : "http://upload13.music.qzone.soso.com/30671794.mp3", i always got java.io.IOException: Server returned HTTP response code: 403 for URL. But it's ok when open the url using browser. Below is part of my code: BufferedInputStream bis = null; BufferedOutputStream bos = null; try { URL url = new URL(link); URLConnection urlConn = url.openConnection(); urlConn.addRequestProperty("User-Agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)"); String contentType = urlConn.getContentType(); System.out.println("contentType:" + contentType); InputStream is = urlConn.getInputStream(); bis = new BufferedInputStream(is, 4 * 1024); bos = new BufferedOutputStream(new FileOutputStream( fileName.toString()));? Anyone could help me? Thanks in advance!

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• Comparing tables with filtering in different databases and visualizing diffs/pushing changes

  - by MicMit

  I am building certain GUI in C# for a content manager and looking for the tools or code snippets or open libraries ( code ideally in C# ) which allow me the following : 1. For table A in database X (test ) and table A in database Y (production) and for a simple filter ( e.g. listname = "XYZ" ) I need to show additions/deletions/updates in some way. which might be side-by-side or just 2 record added table with some fields 2 record deleted table with some fields Considering that this task is very common, I guess, certain components should exist ? Components either return some collections from parameters given for further visualizing or just produce for e.g. html report. 2. I need to push changes for the filter I mentioned in 1 and update table in production database for this filter only ( ie for the particular list approved by content person). Again probably there are certain SQL code generators - components in addition to diffs or standalone.

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• C# Memoization of functions with arbitrary number of arguments

  - by Lirik

  I'm trying to create a memoization interface for functions with arbitrary number of arguments, but I'm failing miserably. The first thing I tried is to define an interface for a function which gets memoized automatically upon execution: class EMAFunction:IFunction { Dictionary<List<object>, List<object>> map; class EMAComparer : IEqualityComparer<List<object>> { private int _multiplier = 97; public bool Equals(List<object> a, List<object> b) { List<object> aVals = (List<object>)a[0]; int aPeriod = (int)a[1]; List<object> bVals = (List<object>)b[0]; int bPeriod = (int)b[1]; return (aVals.Count == bVals.Count) && (aPeriod == bPeriod); } public int GetHashCode(List<object> obj) { // Don't compute hash code on null object. if (obj == null) { return 0; } // Get length. int length = obj.Count; List<object> vals = (List<object>) obj[0]; int period = (int) obj[1]; return (_multiplier * vals.GetHashCode() * period.GetHashCode()) + length;; } } public EMAFunction() { NumParams = 2; Name = "EMA"; map = new Dictionary<List<object>, List<object>>(new EMAComparer()); } #region IFunction Members public int NumParams { get; set; } public string Name { get; set; } public object Execute(List<object> parameters) { if (parameters.Count != NumParams) throw new ArgumentException("The num params doesn't match!"); if (!map.ContainsKey(parameters)) { //map.Add(parameters, List<double> values = new List<double>(); List<object> asObj = (List<object>)parameters[0]; foreach (object val in asObj) { values.Add((double)val); } int period = (int)parameters[1]; asObj.Clear(); List<double> ema = TechFunctions.ExponentialMovingAverage(values, period); foreach (double val in ema) { asObj.Add(val); } map.Add(parameters, asObj); } return map[parameters]; } public void ClearMap() { map.Clear(); } #endregion } Here are my tests of the function: private void MemoizeTest() { DataSet dataSet = DataLoader.LoadData(DataLoader.DataSource.FROM_WEB, 1024); List<String> labels = dataSet.DataLabels; Stopwatch sw = new Stopwatch(); IFunction emaFunc = new EMAFunction(); List<object> parameters = new List<object>(); int numRuns = 1000; long sumTicks = 0; parameters.Add(dataSet.GetValues("open")); parameters.Add(12); // First call for(int i = 0; i < numRuns; ++i) { emaFunc.ClearMap();// remove any memoization mappings sw.Start(); emaFunc.Execute(parameters); sw.Stop(); sumTicks += sw.ElapsedTicks; } Console.WriteLine("Average ticks not-memoized " + (sumTicks/numRuns)); sumTicks = 0; // Repeat call for (int i = 0; i < numRuns; ++i) { sw.Start(); emaFunc.Execute(parameters); sw.Stop(); sumTicks += sw.ElapsedTicks; } Console.WriteLine("Average ticks memoized " + (sumTicks/numRuns)); } The performance is confusing me... I expected the memoized function to be faster, but it didn't work out that way: Average ticks not-memoized 106,182 Average ticks memoized 198,854 I tried doubling the data instances to 2048, but the results were about the same: Average ticks not-memoized 232,579 Average ticks memoized 446,280 I did notice that it was correctly finding the parameters in the map and it going directly to the map, but the performance was still slow... I'm either open for troubleshooting help with this example, or if you have a better solution to the problem then please let me know what it is.

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• Why does my Excel add-in only half work?

  - by Dan Crowther

  I've created an Excel add-in using Visual Studio 2008. It has a ribbon, a bunch of panes and code that adds sheets and ranges and gets information scraped from a web page. When I run it on my dev PC it works perfectly. I used the Publish command to publich it and installed on a Windows XP virtual PC. The installation seemed fine and when I open Excel I see my ribbon. If I click a button that shows a pane, up pops the pane. If I enter some details into the pane that should create a range and populate it with data from a web page, the range is created but the web page is not visited (I have tested that I have connectivity). One of my buttons adds a hidden worksheet and another displays or hides that sheet. One of these buttons is not working. I've tried everything I can think of. I'm wondering if there are any permissions or trust issues I need to deal with?

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• automatic id generation which is a primary key

  - by abhi

  in vb.net while entering a new entry i want to assign a record a unique id like in case of numeric i do this way Dim ItemID As Integer KAYAReqConn.Open() SQLCmd = New SqlCommand("SELECT ISNULL(MAX(ItemID),0) AS ItemID from MstItem", ReqConn) Dim dr As SqlDataReader dr = SQLCmd.ExecuteReader If dr.HasRows Then dr.Read() ItemID = dr("ItemID") + 1 End If dr.Close() in this case m using itemid as a unique id and the format is 1,2,3... and m finding out the max and assigning to a new record but how to assign if the previous id is of the a00001,a00002,a00003,a00004...so on. how i do i produce a unique id in this case

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• OAuth on iPhone: using Safari or UIWebView?

  - by athanhcong

  Hi all, When I implement OAuth in iPhone, I have a dilemma to choose Safari or UIWebView to open the Twitter pages for user authentication? I write some advantage and disadvantage of both case: Using UIWebWeb. The disadvantage is users have to enter their credentials in our application. It's maybe risky phishing. The advantage is this approach will not quit our app. Using Safari for user to authenticate (this approach automatically callbacks to our application) Addvantage: less risky. Disadvantage: have to quit our app A good reference link about this: http://fireeagle.yahoo.net/developer/documentation/oauth_best_practice Which approach do you prefer? Any response is appreciate. Thanks.

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• Testing complex entities

  - by Carlos

  I've got a C# form, with various controls on it. The form controls an ongoing process, and there are many, many aspects that need to be right for the program to run correctly. Each part can be unit tested (for instance, loading some coefficients, drawing some diagnostics) but I often run into problems that are best described with an example: "If I click here, then here, then change this, then re-open the form, then click here, it crashes or produces an error" I've tried my best to use common code organisational ideas (inheritance, DRY, separation of concerns) but there never seems to be a way to test every single path, and inevitably, a form with several controls will have a huge number of ways to execute. What can I read (preferably online) that addresses this kind of issue, and is there a (non-generic) term for it. This isn't a specific problem I'm having, but one that creeps up on me, especially with WinForms.

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• How do I create an 8-bit PNG with transparency from an NSBitmapImageRep?

  - by Rob Keniger

  I have a 32-bit NSBitmapImageRep which has an alpha channel with essentially 1-bit values (the pixels are either on or off). I want to save this bitmap to an 8-bit PNG file with transparency. If I use the -representationUsingType:properties: method of NSBitmapImageRep and pass in NSPNGFileType, a 32-bit PNG is created, which is not what I want. I know that 8-bit PNGs can be read, they open in Preview with no problems, but is it possible to write this type of PNG file using any built-in Mac OS X APIs? I'm happy to drop down to Core Image or even QuickTime if necessary. A cursory examination of the CGImage docs didn't reveal anything obvious. EDIT: I've started a bounty on this question, if someone can provide working source code that takes a 32-bit NSBitmapImageRep and writes a 256-color PNG with 1-bit transparency, it's yours.

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• Flex 3 / Air: Writing blank new lines to files using FileStream

  - by Edward

  I want to write some text directly to a file using Flex 3 / Air. The text on the file (call it "Database.txt") must have the following format: Line1 Line2 Line3 var FS:FileStream = new FileStream(); var DatabaseFile:File = File.desktopDirectory.resolvePath("Database.txt"); FS.open(DatabaseFile, FileMode.WRITE); FS.writeUTFBytes("Line1" + "\n" + "Line2" + "\n" + "Line3"); FS.close(); But it writes the following text to the file: Line1 Line2 Line3. I'm pretty sure I'm making a very dummy error, but I cannot figure out what it is. Can anyone help me? Thank you for your time :)

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• Isssue with ColorBox jQuery plugin

  - by RyanP13

  Hi, I am using this plugin for my new site: http://colorpowered.com/colorbox/ The page in concern has two hyper links which are of the same class: a.emailQuote These both should open the same colorbox window which is done by the following code: $("a.emailQuote").colorbox({ transistion:"fade", title:true, iframe:true, scrolling:false, close:"Close this window", innerWidth:478, innerHeight:507, initialWidth:478, initialHeight:507 }); however when the colorbox window opens it seems to register that there are two windows so displays the previous, next arrows and the text that says this is image one of two. I was wondering if there was a way to fix this without hiding these elements with CSS.

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• Setting up boost filesystem

  - by brit

  I've been having serious problems trying to set up boost. I must have installed and uninstalled the libraries a dozen times. In my most recent attempt, I followed these instructions: Download the zip and unzip it. Get the prebuilt jam executable and unzip it. Put that directory in your path. (Edit Path by using Control Panel...System..Advanced....Environemnt Variables) Open Visual Studio command prompt. Browse to boost directory. Run: bjam "-sTOOLS=vc-8_0" install The main reason I'm trying to use boost is for boost/filesystem yet nothing is working. I know this question has been asked before, but it only resulted in more errors.. Please Help!

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• Phonegap - Share functionality to Email, Twitter and Facebook

  - by Nik

  Hi, is there an example how to programm the functionality with the Phonegap Framework to share a URL to email, twitter and Facebook? For Example in Android this functionality is in 90% of the apps. In Iphone it is in any Apps. In the app of techcrunch for Iphone you can see it, when You open an article. It is possible to create this with phonegap too? Please for examples or docu if it is possible. Thanks and Happy New Year Cheers Nik

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• Jquery - Errors only in Internet Explorer

  - by Gublooo

  Hey Guys I am getting several errors only on IE8 running on my vista OS. On the other browsers (Chrome, FF, Safari) everything works fine. Not sure where to begin looking. When I open a new IE8 browser and enter the homepage URL of my website - I get the following error and the page opens up blank: Line: 19 Character: 12043 Code: 0 Error Message: Object required URL: http://xyz.com/js/jquery.js Then in one other place - I have a modal form which has a text area - when I start typing - after typing every character - this error shows up Line: 19 Character: 30711 Code: 0 Error Message: 'this[...].style' is null or not an object URL: http://xyz.com/js/jquery.js Thanks for your help

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• PHP/Javascript - get php variable within javascript

  - by McNabbToSkins

  I have run into an interesting problem. I am currently developing php page and need to access a php variable within the javascript onload. $(document).ready(function() { var temp = <?php $page_id ?> } is this valid? I know that this might seem weird and not be allowed but I am developing a page that has two popup windows. The windows are created using the same view template and there is no way to distinguish between each other. If I stored a hidden value on the page with information unique to the page like so <input type="hidden" value="<?php $page_id ?> id="page_id" /> if there are two views open at the same time there is no way for me to get a unique page id like so var temp = $("#page_id").val(); Because there are two views witht he same input id that is not unique. Long story short is it valid to reference a php variable in the javascript.

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• OleDbException in my update method

  - by Hamed Norouzi

  Why do I have this error? The error message is: Syntax error in INSERT INTO statement. I want to add a record to my database, but it isn't working. Where is the problem? The code is: using (OleDbConnection connection = new OleDbConnection(connectionString)) { OleDbDataAdapter DbDataAdabter = new OleDbDataAdapter(); DbDataAdabter.SelectCommand = new OleDbCommand("SELECT * FROM [Phone-Book]", connection); OleDbCommandBuilder cb = new OleDbCommandBuilder(DbDataAdabter); connection.Open(); DataRow dataRow = myDataset.Tables["salam"].NewRow(); dataRow[1] = textBox2.Text; dataRow[2] = textBox3.Text; dataRow[3] = textBox4.Text; dataRow[4] = textBox5.Text; dataRow.EndEdit(); myDataset.Tables["salam"].Rows.Add(dataRow); DbDataAdabter.Update(myDataset , "salam"); connection.Close(); connection.Dispose(); } }

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• How can I graph the Lines of Code history for git repo?

  - by dbr

  Basically I want to get the number of lines-of-code in the repository after each commit. The only (really crappy) ways I have found is to use git filter-branch to run "wc -l *", and a script that run git reset --hard on each commit, then ran wc -l To make it a bit clearer, when the tool is run, it would output the lines of code of the very first commit, then the second and so on.. This is what I want the tool to output (as an example): me@something:~/$ gitsloc --branch master 10 48 153 450 1734 1542 I've played around with the ruby 'git' library, but the closest I found was using the .lines() method on a diff, which seems like it should give the added lines (but does not.. it returns 0 when you delete lines for example) require 'rubygems' require 'git' total = 0 g = Git.open(working_dir = '/Users/dbr/Desktop/code_projects/tvdb_api') last = nil g.log.each do |cur| diff = g.diff(last, cur) total = total + diff.lines puts total last = cur end

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• MSMQ.MSMQQueueInfo PathName Not Accepted

  - by user357596

  I am using MSMQ.MSMQQueueInfo with jscript on Windows 7 (the latest MSMQ version). This is being run on a domain joined computer. For some reason unknown to me, it just will not accept the PathName I give it (which is in an acceptable format). Here is the code: var qi = new ActiveXObject ("MSMQ.MSMQQueueInfo"); qi.PathName = "FormatName:Direct=OS:mycomputer\\Private$\\myqueue"; I know this PathName works, because I use the exact same path in c#, and that works: queue = new MessageQueue("FormatName:DIRECT=OS:" + contollerName + "\\Private$\\" + queueName); When the code "qi.Open()" in the jscript code attempts to execute, it returns this error message: The queue path name specified is invalid. Has anyone else run into this? Ideas? Comments? Suggestions? Thank you in advance!

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• Can a Domain Specific Language (DSL) be localized?

  - by michielvoo

  I have never written a DSL, but I am considering it as a feature for a new project (hypothetical). It would be for end users to be able to express in natural language concepts such as weekdays between 10 and 11 except on the first monday of the month. Dutch users might write weekdagen tussen 10 en 11 behalve op de eerste maandag van de maand. In this case the position of the words seems to match, but there may be expressions where the position of verbs/nouns etc. could be different between languages. I realise the obvious answer (it depends). I am a .NET developer and I consider using Boo but I'm open to suggestions. I need to understand wether each translation requires rewriting a part of the implementation (which part) or if there is a way to do actual translations, maybe in some sort of preprocessor. Thanks!

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