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• Get drive label in C#

  - by Rick

  When I use System.IO.DriveInfo.GetDrives() and look at the .VolumeLabel property of one of the drives, I see "PATRIOT XT", which is indeed the drive's volume label. If I open "My Computer", instead I see "TrueCrypt Traveler Disk", and I can't seem to find any way to programmatically retrieve that value as none of the DriveInfo properties hold that value. I also tried querying the information via WMI's Win32_LogicalDisk, but no properties contained that value there either. So any idea what the label My Computer uses is called, and more importantly, how to programmatically retrieve it? Thanks

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• force close when assign onclick to button

  - by Lynnooi

  hi, i am very new in android development as well as in java. i had developed an application that gets an image url from a site and wanted to download it into the device and later on i would like to enable users to set it as wallpapers. however, i am met a problem when assigning onclick event to a button. Once i uncomment the line in red, it will pop up a box stating that the application was stopped unexpectedly. Can someone please help me with this? private ImageView imView = null; public void onCreate(Bundle icicle) { super.onCreate(icicle); setContentView(R.layout.main); try { /* Create a URL we want to load some xml-data from. */ URL url = new URL(xmlURL); /* Get a SAXParser from the SAXPArserFactory. */ SAXParserFactory spf = SAXParserFactory.newInstance(); SAXParser sp = spf.newSAXParser(); /* Get the XMLReader of the SAXParser we created. */ XMLReader xr = sp.getXMLReader(); /* Create a new ContentHandler and apply it to the XML-Reader */ ExampleHandler myExampleHandler = new ExampleHandler(); xr.setContentHandler(myExampleHandler); /* Parse the xml-data from our URL. */ xr.parse(new InputSource(url.openStream())); /* Parsing has finished. */ /* Our ExampleHandler now provides the parsed data to us. */ ParsedExampleDataSet parsedExampleDataSet = myExampleHandler .getParsedData(); /* Set the result to be displayed in our GUI. */ if (myExampleHandler.filenames != null) { a = a + "\n" + myExampleHandler.filenames + ", by " + myExampleHandler.authors + "\nhits: " + myExampleHandler.hits + " downloads"; this.ed = myExampleHandler.thumbs; this.imageURL = myExampleHandler.mediafiles; } } catch (Exception e) { a = e.getMessage(); } // get thumbnail Context context = this.getBaseContext(); if (ed.length() != 0) { Drawable image = ImageOperations(context, this.ed, "image.jpg"); ImageView imgView = new ImageView(context); imgView = (ImageView) findViewById(R.id.image1); imgView.setImageDrawable(image); } TextView tv = (TextView) findViewById(R.id.txt_name); tv.setText(a); Button bt3 = (Button) findViewById(R.id.get_imagebt); //bt3.setOnClickListener(getImageBtnOnClick); } OnClickListener getImageBtnOnClick = new OnClickListener() { public void onClick(View view) { downloadFile(imageURL); } }; void downloadFile(String fileUrl) { URL myFileUrl = null; try { myFileUrl = new URL(fileUrl); } catch (MalformedURLException e) { // TODO Auto-generated catch block e.printStackTrace(); } try { HttpURLConnection conn = (HttpURLConnection) myFileUrl .openConnection(); conn.setDoInput(true); conn.connect(); int length = conn.getContentLength(); InputStream is = conn.getInputStream(); bmImg = BitmapFactory.decodeStream(is); // this.imView.setImageBitmap(bmImg); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } private Drawable ImageOperations(Context ctx, String url, String saveFilename) { try { InputStream is = (InputStream) this.fetch(url); Drawable d = Drawable.createFromStream(is, "src"); return d; } catch (MalformedURLException e) { e.printStackTrace(); return null; } catch (IOException e) { e.printStackTrace(); return null; } } public Object fetch(String address) throws MalformedURLException, IOException { URL url = new URL(address); Object content = url.getContent(); return content; } Main.xml <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" android:id="@+id/viewgroup"> <ImageView android:id="@+id/image1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center" /> <ImageView android:id="@+id/image2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center" /> <TextView android:id="@+id/txt_name" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center_horizontal" /> <Button id="@+id/get_imagebt" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="xxx Get an image" android:layout_gravity="center" /> <ImageView id="@+id/imview" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center" /> </LinearLayout>

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• getting internal server error using rest-client in ruby to post to HTTP POST

  - by Angela

  Hi, this is my code and I don't know how to debug it because I just get an "internal server error": I am trying to HTTP POST to an external ASPX: def upload uri = 'https://api.postalmethods.com/2009-02-26/PostalWS.asmx' #postalmethods URI #https://api.postalmethods.com/2009-02-26/PostalWS.asmx?op=UploadFile #http://www.postalmethods.com/method/2009-02-26/UploadFile @postalcard = Postalcard.find(:last) #Username=string&Password=string&MyFileName=string&FileBinaryData=string&FileBinaryData=string&Permissions=string&Description=string&Overwrite=string filename = @postalcard.postalimage.original_filename filebinarydata = File.open("#{@postalcard.postalimage.path}",'rb') body = "Username=me&Password=sekret&MyFileName=#{filename}&FileBinaryData=#{filebinarydata}" @response = RestClient.post(uri, body, #body as string {"Content-Type" => 'application/x-www-form-urlencoded', "Content-Length" => @postalcard.postalimage.size} # end headers ) #close arguments to Restclient.post end

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• How do I get a list of child elements from XDocument object?

  - by Nick

  Hello.. I am trying to get all of the "video" elements and their attributes from an XML file that looks like this: <?xml version="1.0" encoding="utf-8" ?> <videos> <video title="video1" path="videos\video1.wma"/> <video title="video2" path="videos\video2.wma"/> <video title="video3" path="videos\video3.wma"/> </videos> The following will only select the root node and all of the children. I would like to get all of the 'video' elements into the IEnumerable. Can someone tell me what I'm doing wrong? IEnumerable<XElement> elements = from xml in _xdoc.Descendants("videos") select xml; The above returns a collection with a length == 1. It contains the root element and all the children.

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• How to send mails through php script?

  - by Zeeshan Rang

  Hello everyone. How can i send mails through the php script?? I am trying to do somthing like this: for($k=0;$k<=$x->length-1;$k++) { for($l=0;$l<=$j-1;$l++) { if($y->item($k)->nodeValue==$JobNoArr[$l] && $AcceptanceDateArr[$l]=='0000-00-00') { //echo $v->item($k)->nodeValue ; $email = $v->item($k)->nodeValue . ","; $to = $email; $subject = "My subject"; $txt = "Hello world!"; $headers = "From: [email protected]" . "\r\n" . "CC: [email protected]"; mail($to,$subject,$txt,$headers); } } } Please help me in this issue. Best Zeeshan

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• Calculate total by javascript in gridview with paging

  - by louis

  Without paging function, i can loop through the gridview by using var sum = 0; var gridViewCtlId = '<%=timesheetView.ClientID%>'; var grid = document.getElementById(gridViewCtlId); var gridLength = grid.rows.length; so with gridLength i can loop through the gridview to sum all rows. However, when I use paging event of gridview, i use the page size to loop through all rows, but it occurs errors because the last page may not have enough rows. So would you please to help me how to get the rows in the each page of gridview?

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• How to sort a list alphabetically and have additional lists sorted in the same order

  - by Carl

  I have 3 lists, each with equal elements: email addresses, salaries and IDs I'd like to sort the email addresses alphabetically and in some way sort the other 2 lists (salaries and IDs). E.g., Emails: [email protected] [email protected] Salaries: 50000 60000 IDs: 2 1 The puzzle: I'd like to sort Emails such that [email protected] is first and [email protected] is last and Salaries is 60000 then 50000 and IDs is 1 then 2. Additional detail: 1. Length of lists are the same and can be longer than two elements. 2. I will subsequently pass IDs to functions to retrieve further lists. Those lists won't need sorting as they will adopt the order of the IDs list.

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• ASP.NET Web App to compare performance on different hardware?

  - by Guy

  I'm looking for an open source C# ASP.NET Web App that can be loaded onto 2 or more dedicated servers and provide me with metrics on how that server is performing. E.g. Click on a page and the app does a number of in-memory iterations and/or calculations to test processor throughput. Another page would do a bunch of disk access and report on that. I could put one together myself but there might already be something out there with a whole ton of tools in it to do this. I would imagine that I'm not the first one that would want to compare two machines for use as a web server.

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• Killing HTML nodes from shell

  - by hendry

  Need a solution to kill nodes like <footer>foobar</footer> and <div class="nav"></div> from many several HTML files. I want to dump a site to disk without the menus and footers and what not. Ideally I would accomplish this task using basic unix tools like sed. Since it's not XML I can't use xmlstarlet. Could anyone please suggest recipes, so I can ideally have a script running kill-node.sh 'div class="toplinks"' *.html to prune the bits I don't want. Thank you,

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• How to move row data from one jqgrid

  - by user1268130

  I am trying to move row from one grid to another grid.I am able to add the row to 2nd Grid but not able to delete row in the 1st grid. Here is my code: var RowList; RowList = $('#questions_list').getGridParam('selarrrow'); for (var i=0, list=RowList.length; i<list; i++) { var selectedId = RowList[i]; var selectedData = $('#questions_list').jqGrid('getRowData', selectedId ); $('#selectedQuestions_list').jqGrid('addRowData', selectedId , selectedData ); $('#questions_list').jqGrid('delRowData',selectedId ); } But I am not able to delete row properly,when I add delrowdata,I am not able to add properly.Can any one help me in the code.Thanks in Advance

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• What is the complexity of the below code with respect to memory ?

  - by Cshah

  Hi, I read about Big-O Notation from here and had few questions on calculating the complexity.So for the below code i have calculated the complexity. need your inputs for the same. private void reverse(String strToRevers) { if(strToRevers.length() == 0) { return ; } else { reverse(strToRevers.substring(1)); System.out.print(strToRevers.charAt(0)); } } If the memory factor is considered then the complexity of above code for a string of n characters is O(n^2). The explanation is for a string that consists of n characters, the below function would be called recursively n-1 times and each function call creates a string of single character(stringToReverse.charAT(0)). Hence it is n*(n-1)*2 which translates to o(n^2). Let me know if this is right ?

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• PBKDF2-HMAC-SHA1

  - by Jason

  To generate a valid pairwise master key for a WPA2 network a router uses the PBKDF2-HMAC-SHA1 algorithm. I understand that the sha1 function is performed 4096 times to derive the PMK, however I have two questions about the process. Excuse the pseudo code. 1) How is the input to the first instance of the SHA1 function formatted? SHA1("network_name"+"network_name_length"+"network_password") Is it formatted in that order, is it the hex value of the network name, length and password or straight ASCII? Then from what I gather the 160 bit digest received is fed straight into another round of hashing without any additional salting. Like this: SHA1("160bit digest from last round of hashing") Rise and repeat. 2) Once this occurs 4096 times 256 bits of the output is used as the pairwise master key. What I don't understand is that if SHA1 produces 160bit output, how does the algorithm arrive at the 256bits required for a key? Thanks for the help.

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• Getter/setter on javascript array?

  - by Martin Hansen

  Is there a way to get a get/set behaviour on an array? I imagine something like this: var arr = ['one', 'two', 'three']; var _arr = new Array(); for (var i=0; i < arr.length; i++) { arr[i].defineGetter('value', function(index) { //Do something return _arr[index]; }); arr[i].defineSetter('value', function(index, val) { //Do something _arr[index] = val; }); };

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• learning the Lower levels of computing

  - by Ben

  I am a software developer with four years experience in .Net development, I always like to keep up to date with the latest technologies (.net related normally) being released and love learning them. I didn't however go to university and learnt all I know through helpful colleagues, .Net courses, the internet and good old books. I feel that I am a good developer, but without learning the lower levels of a computer as you would in the first year of a computer related Uni course, I get lost when talking to people about a lot of more technical lower level computing. Is there a book(s) that anyone could recommend, that would cover the lower levels of what is going on when I click "Run" in Visual Studio? I feel out of my depth when my boss says to me "Thats running in the CPU cache" or "you're limited by disk reads there", and would like to feel more confident when talking about how the hardware talks to each other (CPU to RAM etc). Apologise if thats a vague question, or has been asked before (i did check and couldn't find anything on here that answers my question).

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• [IOS SDK] Sending Data to Other Players - Game Center

  - by mohacs

  Hi guys, I am developing a simple game center multiplayer game. i did manage almost everything except sending messeage to players. what i mean, i can invite player to play game, game is starts etc. regarding apple documentation i am using following method to send data but it' doesn't work at all. const char *bytes = "123"; NSData *packet = [NSData dataWithBytes:&bytes length:3]; [myMatch sendDataToAllPlayers: packet withDataMode: GKMatchSendDataUnreliable error:nil]; if possible a working sample would be great. many thanks.

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• Storing a SHA512 Password Hash in Database

  - by Chris

  In my ASP.NET web app I'm hashing my user passwords with SHA512. Despite much SO'ing and Googling I'm unclear how I should be storing them in the database (SQL2005) - the code below shows the basics of how I'm creating the hash as a string and I'm currently inserting it into the database into a Char(88) column as that seems to be the length created consistently Is holding it as a String the best way to do it, if so will it always be 88 chars on a SHA512 (as I have seen some bizarre stuff on Google)? Dim byteInput As Byte() = Encoding.UTF8.GetBytes(sSalt & sInput) Dim hash As HashAlgorithm = New SHA512Managed() Dim sInsertToDatabase As String = Convert.ToBase64String(hash.ComputeHash(byteInput))

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• substring IP address in java

  - by m2010

  This program takes string like that 192.168.1.125 and cut every number then converts it to integer, but it returns an error. import java.lang.String; import java.lang.Number; import java.lang.Integer; class Ip { public static void main ( String [] args ) { int i ; i = args[0].indexOf ( '.' ); do { if ( i != -1 ) args[0].substring ( 0, i ); String str = args[0].substring ( i + 1, args[0].length() ); String str2 = Integer.parseInt ( str ); System.out.println ( str2 ); } while ( i != -1 ); } }

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• Why does python use 'magic methods'?

  - by Greg Beech

  I've been playing around with Python recently, and one thing I'm finding a bit odd is the extensive use of 'magic methods', e.g. to make its length available an object implements a method def __len__(self) and then it is called when you write len(obj). I was just wondering why objects don't simply define a len(self) method and have it called directly as a member of the object, e.g. obj.len()? I'm sure there must be good reasons for Python doing it the way it does, but as a newbie I haven't worked out what they are yet.

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• Algorithm for measuring distance between disordered sequences

  - by Kinopiko

  The Levenshtein distance gives us a way to calculate the distance between two similar strings in terms of disordered individual characters: quick brown fox quikc brown fax The Levenshtein distance = 3. What is a similar algorithm for the distance between two strings with similar subsequences? For example, in quickbrownfox brownquickfox the Levenshtein distance is 10, but this takes no account of the fact that the strings have two similar subsequences, which makes them more "similar" than completely disordered words like quickbrownfox qburiocwknfox and yet this completely disordered version has a Levenshtein distance of eight. What distance measures exist which take the length of subsequences into account, without assuming that the subsequences can be easily broken into distinct words?

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• sharpziplib + Whenever i try to add a file to existing archive, it overwrites previous contents

  - by schmoopy

  I am trying to add files to an existing zip file. Whenever i do, the new one contains the new list of files im passing in, but all of the previous ones are wiped out. I have also tried the code here: http://stackoverflow.com/questions/1356003/c-sharpziplib-adding-file-to-existing-archive -- same results Any idea why i cannot add files to an existing zip while maintaining the previous files? Here is the code: public static void AddFileToZip(string currentZipPath, List<string> files, bool includeFullPathInEntry, int compressionLevel) { ZipOutputStream zipStrm = new ZipOutputStream(File.Open(currentZipPath, FileMode.Open, FileAccess.ReadWrite)); zipStrm.SetLevel(compressionLevel); foreach (string str in files) { string entryName = str; if (!includeFullPathInEntry) entryName = new FileInfo(str).Name; ZipEntry entry = new ZipEntry(entryName); zipStrm.PutNextEntry(entry); Byte[] b = File.ReadAllBytes(str); zipStrm.Write(b, 0, b.Length); } zipStrm.Finish(); zipStrm.Close(); }

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• Efficiently check string for one of several hundred possible suffixes

  - by Ghostrider

  I need to write a C/C++ function that would quickly check if string ends with one of ~1000 predefined suffixes. Specifically the string is a hostname and I need to check if it belongs to one of several hundred predefined second-level domains. This function will be called a lot so it needs to be written as efficiently as possible. Bitwise hacks etc anything goes as long as it turns out fast. Set of suffixes is predetermined at compile-time and doesn't change. I am thinking of either implementing a variation of Rabin-Karp or write a tool that would generate a function with nested ifs and switches that would be custom tailored to specific set of suffixes. Since the application in question is 64-bit to speed up comparisons I could store suffixes of up to 8 bytes in length as const sorted array and do binary search within it. Are there any other reasonable options?

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• Is there ever a reason to use Goto in modern .NET code?

  - by BenAlabaster

  I just found this code in reflector in the .NET base libraries... if (this._PasswordStrengthRegularExpression != null) { this._PasswordStrengthRegularExpression = this._PasswordStrengthRegularExpression.Trim(); if (this._PasswordStrengthRegularExpression.Length == 0) { goto Label_016C; } try { new Regex(this._PasswordStrengthRegularExpression); goto Label_016C; } catch (ArgumentException exception) { throw new ProviderException(exception.Message, exception); } } this._PasswordStrengthRegularExpression = string.Empty; Label_016C: ... //Other stuff I've heard all of the "thou shalt not use goto on fear of exile to hell for eternity" spiel. I always held MS coders in fairly high regard and while I may not have agreed with all of their decisions, I always respected their reasoning. So - is there a good reason for code like this that I'm missing, or was this code extract just put together by a shitty developer? I'm hoping there is a good reason, and I'm just blindly missing it. Thanks for everyone's input

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• a more pythonic way to express conditionally bounded loop?

  - by msw

  I've got a loop that wants to execute to exhaustion or until some user specified limit is reached. I've got a construct that looks bad yet I can't seem to find a more elegant way to express it; is there one? def ello_bruce(limit=None): for i in xrange(10**5): if predicate(i): if not limit is None: limit -= 1 if limit <= 0: break def predicate(i): # lengthy computation return True Holy nesting! There has to be a better way. For purposes of a working example, xrange is used where I normally have an iterator of finite but unknown length (and predicate sometimes returns False).

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• Chrome 5 problem with scroll

  - by Parhs

  $(document).keydown(function (event) { if(event.keyCode==38 || event.keyCode==40) { var row; if(event.keyCode==40) row=$(row_selected).next(); if(event.keyCode==38) row=$(row_selected).prev(); if(row.length==0) { row=$(row_selected); } row_select( row ); var row_position_bottom=$(row).height() +$(row).offset().top; var doc_position=$(window).height() + $(window).scrollTop(); if(row_position_bottom >doc_position) $(window).scrollTop(row_position_bottom-$(window).height()); if($(row).offset().top < $(window).scrollTop()) $(window).scrollTop($(row).offset().top); return false; } }); Hello i used this code to select rows of my table...If the selection isnt visible page scrolls... It works great ,FIrefox,Internet Explorer,Safari, but not in chrome..... In Chrome 4 not the last version it worked great!!! The problem is that return false doesnt prevent the page from scrolling...

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• __spin_lock while writing the bytes in NSOutputStream

  - by Mohammed Sadiq

  HI all, I have a issue that when I try to write some bytes in the outputstream, I am getting the bad access. The code is as follows : int writtenBytes = [_os write:[packetInBytes bytes] maxLength:lengthOfPacket]; where the "packetInBytes" points to NSData and "lengthOfPacket" corresponds to the data length, and _os represents the NSOutputStream. The call stack from the debugger is as follows : 0 0xffff0269 in __spin_lock 1 0x302a6098 in CFSocketDisableCallBacks 2 0x003b46d0 in SocketStream::write 3 0x302402c3 in CFWriteStreamWrite 4 0x0001b423 in -[Writer write:] at Writer.m:96 5 0x0001b5ef in -[Writer run] at Writer.m:111 6 0x3050a79d in -[NSThread main] 7 0x3050a338 in NSThread__main 8 0x91a27fe1 in _pthread_start 9 0x91a27e66 in thread_start** I am not getting this issue always. I get this issue execute my code for some 5 or more times ... I have checked all the params that i pass to the write function have its values and not nil. Any help would be greatly appreciated Best Regards, MOhammed Sadiq.

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