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• How would I access the Windows Login (Authentication) API from a C++ Service Application?

  - by Gabriel

  Let us imagine for a moment that I have a piece of hardware that can act as an authentication for a user on a given system. I want to write an application in C++ to run as a service, look for this device and if found log the appropriate user in. I believe I have found the API's I would need to use to perform the hardware and service portions of the application but am having a hard time nailing down a way to create a "real" user login. Is this possible? If so where would I look to find resources on accomplishing this? I think of it as being an analog to fingerprint scanner login type devices.

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• .NET chart Datamanipulator

  - by peter

  In .NET C#4.0 with the .NET Chart control I have this code to generate a pie chart: chart.Series[0].ChartType = SeriesChartType.Pie; foreach (Order order in orderCollection) { // If I set point.LegendText = order.UserName, .Group will erase it chart.Series[0].Points.AddXY(order.UserName, order.Total); } chart.DataManipulator.Sort(PointSortOrder.Ascending, "X", "Series1"); chart.DataManipulator.Group("SUM", 1, IntervalType.Months, "Series1"); This works well, it generates a pie chart with the top 10 users showing their total order sum. I would like to set the DataPoints' legendtext to the order.UserName property. The problem is, DataManipulator.Group overwrites the series DataPoints. So if I set the legendtext in the foreach loop, they will be erased after the Group call. And after the Group call, I don't see a way to retrieve the correct UserName for a DataPoint to set the legendtext. What is the best approach for this situation?

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• Setting a property value on each of the results in a FetchedResults set

  - by RickiG

  Hi On my Core Data Entity "Book" i have a boolean property, 'wasViewed' (NSNumber numberWithBool) that tells me if the Book was "viewed". I would like to implement a sort of "reset" this property for all my NSManagedObjects "Book". So that I can set them all to NO between sessions. I use an NSPredicate to retrieve all the Books like this: NSPredicate *predicate = [NSPredicate predicateWithFormat:@"wasViewed == %@", [NSNumber numberWithBool:YES]]; // code for setting entity, request etc... NSMutableArray *mutableFetchResults = [[[managedObjectContext executeFetchRequest:request error:&error] mutableCopy] autorelease]; This is working just fine, however, now I need to set up a loop, go through each Book object, something like this: for(Book *b in mutableFetchResults) { [b setWasViewed:NO] } Is there a way to perform an action on each element that fits the predicate instead of retrieving it? So instead of executeFetchRequest on a managedObjectContext it could be executeOperationOnFetchRequestResults or something along those lines. Thanks for any input given:)

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• ldapsearch and vcard creation

  - by Aaron Hoffman

  I'm using openldap on Mac OS X Server 10.6 and need to generate a vcard for all the users in a given group. By using the ldapsearch I can list all the memberUid's for all users in that group. I found a perl script (Advanced LDAP Search or ALS) that was written by someone that will generate the vcard easily. ALS can be found here http://www.ldapman.org/tools/als.gz So what I need to do is create a wrapper script (in python or perl) that will effectively loop through the memberUid's and run the ALS command to create the vcard and append it to the file. This command provides the memberUid's: ldapsearch -x -b 'dc=ldap,dc=server,dc=com' '(cn=testgroup)' Then running ALS gives the vcard: als -b dc=ldap,dc=server,dc=com -V uid=aaronh > vcardlist.vcf If it's easier to do this using Perl since ALS is already using it that would be fine. I've done more work in python but I'm open to suggestions. Thanks in advance, Aaron

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• Preload *.wav with SystemSoundID?

  - by fuzzygoat

  I am playing a wav file to give a little audio feedback when a button in my UI is pressed. My question is when you first press the button there is a delay (about 1.5secs) whilst the sound file "sound.wav" is loaded and cached. Is there a way to pre-cache this file (maybe in my viewDidLoad)? I guess I could do it by just playing it a viewDidLoad, but would really need to disable the audio so it does not "beeb" each time the app starts. many thanks for and help. gary EDIT: Looks like my question is a duplicate of this post unless anyone has any new info? Maybe a way to turn the play volume down temporarily, unless the audio is cleared each time through the run loop.

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• Issue with maxWorkerThreads and thread count

  - by Kartik M

  I have created an ASP.NET application which creates threads in an infinite loop. I set maxWorkerThreads to 20 in processModel in machine.config. When I checked the Thread count in perfmon there was around 7000 threads created in worker process. In PageLoad() I have: using System.Threading; ... int count = 0; var threadList = new System.Collections.Generic.List<System.Threading.Thread>(); try { while (true) { Thread newThread = new Thread(ThreadStart(DummyCall), 1024); newThread.Start(); threadList.Add(newThread); count++; } } catch (Exception ex) { Response.Write(count + " : " + ex.ToString()); } Function: void DummyCall() { System.Threading.Thread.Sleep(1000000000); } How do I restrict thread creation in ASP.NET with IIS6/7?

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• Looping an executable to get the result from Python script

  - by fx

  In my python script, I need to call within a for loop an executable, and waiting for that executable to write the result on the "output.xml". How do I manage to use wait() & how do I know when one of my executable is finished generating the result to get the result? How do I close that process and open a new one to call again the executable and wait for the new result? import subprocess args = ("bin/bar") popen = subprocess.Popen(args) I need to wait for the output from "bin/bar" to generate the "output.xml" and from there, read it's content. for index, result in enumerate(results): myModule.callSubProcess(index) #this is where the problem is. fileOutput = open("output.xml") parseAndStoreInSQLiteFileOutput(index, file)

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• How good is my method of embedding version numbers into my application using Mercurial hooks?

  - by ArtB

  This is not quite a specifc question, and more me like for a criticism of my current approach. I would like to include the program version number in the program I am developing. This is not a commercial product, but a research application so it is important to know which version generated the results. My method works as follows: There is a "pre-commit" hook in my .hg/hgrc file link to .hg/version_gen.sh version_gen.sh consists solely of: hg parent --template "r{rev}_{date|shortdate}" > version.num In the makefile, the line version="%__VERSION__% in the main script is replaced with the content of the version.num file. Are there better ways of doing this? The only real short coming I can see is that if you only commit a specfic file, version.num will be updated, but it won't be commited, and if I tried to add always committing that file, that would result in an infite loop (unless I created some temp file to indicate I was already in a commit, but that seems ugly...).

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• CSS autohide scrollbar when not scrolling on Android webpage

  - by b0Gd4N

  Is there a way to make the scrollbar auto-hide when a user is not scrolling a webpage on an Android device, but make it visible when it is scrolling? Please note that Firefox browsers does have this behaviour enabled by default, it's just Chrome and stock(Samsung, HTC) browsers that don't. This is what I currently have: -webkit-box-flex: 1; width: 100%; overflow: auto; -webkit-overflow-scrolling: touch; And I can always see the scrollbar on the list (except in ffox)

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• Python: Trying to get index of an intersection

  - by user1620716

  I have the following line of code: for i in [i for i,x in enumerate(catdate) if x == set(NNSRCfile['datetimenew']).intersection(catdate)]: print i I am trying to find the index of the intersection for the two components above. Both are lengthy lists that have several commonalities. The intersection part works perfectly; however, the for loop seems to output nothing. (ie: there is nothing that is printed). Python outputs no error, and when I run the code in IPython, I notice that i is equivalent to to the very last element in the list "catdate", instead of listing the indices of "catdate" that are equivalent to the intersection values. Any help is greatly appreciated!

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• Iterating backward

  - by MBennett

  Suppose I have a vector<int> myvec and I want to loop through all of the elements in reverse. I can think of a few ways of doing this: for (vector<int>::iterator it = myvec.end() - 1; it >= myvec.begin(); --it) { // do stuff here } for (vector<int>::reverse_iterator rit = myvec.rbegin(); rit != myvec.rend(); ++rit) { // do stuff here } for (int i = myvec.size() - 1; i >= 0; --i) { // do stuff here } So my question is when should I use each? Is there a difference? I know that the first one is dangerous because if I pass in an empty vector, then myvec.end() - 1 is undefined, but are there any other hazards or inefficiencies with this?

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• Injecting dependency into entity repository

  - by Hubert Perron

  Is there a simple way to inject a dependency into every repository instance in Doctrine2 ? I have tried listening to the loadClassMetadata event and using setter injection on the repository but this naturally resulted in a infinite loop as calling getRepository in the event triggered the same event. After taking a look at the Doctrine\ORM\EntityManager::getRepository method it seems like repositories are not using dependency injection at all, instead they are instantiated at the function level: public function getRepository($entityName) { $entityName = ltrim($entityName, '\\'); if (isset($this->repositories[$entityName])) { return $this->repositories[$entityName]; } $metadata = $this->getClassMetadata($entityName); $customRepositoryClassName = $metadata->customRepositoryClassName; if ($customRepositoryClassName !== null) { $repository = new $customRepositoryClassName($this, $metadata); } else { $repository = new EntityRepository($this, $metadata); } $this->repositories[$entityName] = $repository; return $repository; } Any ideas ?

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• What is the result of X(X,X)? [closed]

  - by Sorush Rabiee

  A friend who studies pure mathematics ask me to think about the following problem. Suppose that there is an algorithm named X that has 2 inputs: A and a_1...a_n, where 'A' stands for an arbitary algorithm and 'a_1..a_n' are inputs of A. X receives A and its inputs and returns true if A with a_1..a_n could be terminated, and false if A with a_1..a_n inputs fall into an infinite loop (never ends). Like this: A(n): while(n<5): write "I'm immortal!" and the result of X(A,6) is true and X(A,2) is false. So what is the result of X(X,X)? Also, do you know who was the first to introduce this problem?

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• Android - Connectivity Questions

  - by Donal Rafferty

  I have a couple of questions about connectivity on Android, if anyone has any insight it would be great. What is the default when an application wants to wirelessly connect? Is it wlan? And if wlan is switched off or there is no access points around is it 3g or gprs? Is a device always ip connected? Or when its disabled from wlan or 3g does it lose its ip address? Is an application, for example the browser only ever connected to one ip address? Or can it be connected to multiple addresses for each radio such as gprs or wifi (wlan)? Can an application decide which connection to open a socket to? For example can I create an application and decide whether to connect the socket to the wlan or gprs? Or does the OS decide? Finally how do native applications handle connectivity? In the same manner?

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• C++ password masking

  - by blaxc

  hi... i'm writing a code to receive password input. Below is my code... the program run well but the problem is other keys beside than numerical and alphabet characters also being read, for example delete, insert, and etc. can i know how can i avoid it? tq... string pw=""; char c=' '; while(c != 13) //Loop until 'Enter' is pressed { c = _getch(); if(c==13) break; if(c==8) { if(pw.size()!=0) //delete only if there is input { cout<<"\b \b"; pw.erase(pw.size()-1); } } if((c>47&&c<58)||(c>64&&c<91)||(c>96&&c<123)) //ASCii code for integer and alphabet { pw += c; cout << "*"; } }

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• jquery hover issue

  - by jay

  hi, i have mouseover issues sometimes when i move my mouse fast over links it loops for quite a while, is there a way to only loop if mouse is stil over and stop if the mouse is not. $('ul.display li').hover(function() { $('ul.display li').find('#details').hide(); // hides all deatils div before showing $('#light').delay('800').fadeIn("fast"); // shows div that fades out all other content. if($.cookie("switch_thumb") =="thumb_view" || $.cookie("switch_thumb") =="null"){//checks for cookie set for display type $(this).find('#details').delay('900').animate({width:'toggle'}); // grow width }else{ $(this).find('#details').delay('900').animate({height:'toggle'}); // grow height } }, function() { $('#light').fadeOut("fast"); // dim the light to show all content $('ul.display li').find('#details').hide(); //hide all details return false; // supposed to stop looping. });

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• Phonegap/Cordova orientation change Android 4

  - by user1477576

  I have a problem changing the orientation of the device (Android 4). In other versions it works fine. Versión of Cordova: cordova-1.8.0.js / cordova-1.8.1.js In Android 4 the app crash or show: "A network error occurred. (file:///android_asset/www/index.html)" I searched a lot about this and no answer solves the problem. In most cases users suggest adding: android:configChanges="orientation|keyboardHidden|screenSize" In other cases: super.setIntegerProperty("loadUrlTimeoutValue",60000); That not work for me :( My manifest activity: <activity android:name=".AppNameActivity" android:label="@string/app_name" android:configChanges="orientation|keyboardHidden|screenSize"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> The application should run on Android 2.2 to 4. Thank you very much for the help.

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• 'Array of arrays' in matlab?

  - by waitinforatrain

  Hey, having a wee bit of trouble. Trying to assign a variable length 1d array to different values of an array, e.g. a(1) = [1, 0.13,0.52,0.3]; a(2) = [1, 0, .268]; However, I get the error: ??? In an assignment A(I) = B, the number of elements in B and I must be the same. Error in ==> lab2 at 15 a(1) = [1, 0.13,0.52,0.3]; I presume this means that it's expecting a scalar value instead of an array. Does anybody know how to assign the array to this value? I'd rather not define it directly as a 2d array as it is for are doing solutions to different problems in a loop Edit: Got it! a(1,1:4) = [1, 0.13,0.52,0.3]; a(2,1:3) = [1, 0, .268];

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• real time updates for new page events

  - by Ben Ford

  I know there's a few questions knocking around on this topic but none quite the same. I'm currently searching by location for all the pages relating to a particular geographic location and caching their events in a database. The problem being I have to currently loop through all the pages i'm watching frequently to check for updates. At the moment the 10,000 Pages I'm keeping track of takes a good while to update. It would be much neater (and nicer to fb) to be notified instead of polling. Does anyone know of a more efficient to do this? Thanks Ben

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• "The C Programming Language" question about quote in the preface

  - by kurige

  From the preface of the second edition of Kernighan and Ritchie's "The C Programming Language": As before, all examples have been tested directly from the text, which is in machine-readable form. That quote threw me for a loop. What exactly does it mean? Was the original manuscript written as a literate program? My first thought was that this book, published in 1988 (original, first edition in 1978) predates literate programming, but now I'm not so sure. Can anybody shed some light on this?

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• Generating an array of functions?

  - by Wordpressor

  I have a few PHP files filled with multiple functions. Let's call them functions1.php, functions2.php, functions3.php: function function_something( $atts ) { extract( something_atts( array( 'foo' => 'bar', 'bar' => 'foo, ), $atts ) ); return 'something'; } I'm loading these files within all_functions.php like this: require_once('functions1.php'); require_once('functions2.php'); require_once('functions3.php'); I'm wondering if it's possible to create an array of all these functions and their attributes? I'm thinking about something like: function my_functions() { require_once('functions1.php'); require_once('functions2.php'); require_once('functions3.php'); } And then some foreach loop, but I'm not sure how should it look like after all. I know this probably looks tricky, but I'm just curious if I'm able to list all my WordPress shortcodes without PHP's Reflection API :)

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• Win32 select/poll/eof/ANYTHING!?!?!

  - by Andrew

  Using the standard Win32 file I/O API's (CreateFile/ReadFile/etc), I'm trying to wait for a file to become readable, or for an exception to occur on the file. If Windows had any decent POSIX support, I could just do: select(file_count, files_waiting_for_read, NULL, files_waiting_for_excpt, NULL, NULL); And select will return when there's anything interesting on some of the files. Windows doesn't support select or poll. Fine. I figured I could take the file and do something like: while(eof(file_descriptor)) { Sleep(100); } The above loop would exit when more data is available to be read. But nope, Windows doesn't have an equivalent of eof() either! I could possibly call ReadFile() on the file, and determine if it's at the eof that way. But, then I'd have to handle the reading at that point in time -- I'm hoping to simply be able to figure out that a file is readable, without actually reading it. What are my options?

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• Update table rows in a non-sequential way using the output of a php script

  - by moviemaniac

  Good evening everybody, this is my very first question and I hope I've done my search in stack's archive at best!!! I need to monitor several devices by querying theyr mysql database and gather some informations. Then these informations are presented to the operator in an html table. I have wrote a php script wich loads devices from a multidimensional array, loops through the array and gather data and create the table. The table structure is the following: <table id="monitoring" class="rt cf"> <thead class="cf"> <tr> <th>Device</th> <th>Company</th> <th>Data1</th> <th>Data2</th> <th>Data3</th> <th>Data4</th> <th>Data5</th> <th>Data6</th> <th>Data7</th> <th>Data8</th> <th>Data9</th> </tr> </thead> <tbody> <tr id="Device1"> <td>Devide 1 name</td> <td>xx</td> <td><img src="/path_to_images/ajax_loader.gif" width="24px" /></td> <td>&nbsp;</td> <td>&nbsp;</td> <td>&nbsp;</td> <td>&nbsp;</td> <td>&nbsp;</td> <td>&nbsp;</td> <td>&nbsp;</td> <td>&nbsp;</td> </tr> <tr id="Device2"> <td>Devide 1 name</td> <td>xx</td> <td><img src="/path_to_images/ajax_loader.gif" width="24px" /></td> <td>&nbsp;</td> <td>&nbsp;</td> <td>&nbsp;</td> <td>&nbsp;</td> <td>&nbsp;</td> <td>&nbsp;</td> <td>&nbsp;</td> <td>&nbsp;</td> </tr> <tr id="DeviceN"> <td>Devide 1 name</td> <td>xx</td> <td><img src="/path_to_images/ajax_loader.gif" width="24px" /></td> <td>&nbsp;</td> <td>&nbsp;</td> <td>&nbsp;</td> <td>&nbsp;</td> <td>&nbsp;</td> <td>&nbsp;</td> <td>&nbsp;</td> <td>&nbsp;</td> </tr> </tbody> </table> The above table is directly populated when I first load the page; then, with a very simple function, i update this table every minute without reloading the page: <script> var auto_refresh = setInterval( function() { jQuery("#monitoring").load('/overview.php').fadeIn("slow"); var UpdateTime= new Date(); var StrUpdateTime; StrUpdateTime= ('0' + UpdateTime.getHours()).slice(-2) + ':' + ('0' + UpdateTime.getMinutes()).slice(-2) + ':' + ('0' + UpdateTime.getSeconds()).slice(-2); jQuery("#progress").text("Updated on: " + StrUpdateTime); }, 60000); </script> The above code runs in a wordpress environment. It comes out that when devices are too much and internet connection is not that fast, the script times out, even if i dramatically increase the timeout period. So it is impossible even to load the page the first time... Therefore I would like to change my code so that I can handle each row as a single entity, with its own refresh period. So when the user first loads the page, he sees n rows (one per device) with the ajax loader image... then an update cycle should start independently for each row, so that the user sees data gathered from each database... then ajax loader when the script is trying to retrieve data, then the gathered data once it has been collected or an error message stating that it is not possible to gather data since hour xx:yy:zz. So rows updating should be somewhat independent from the others, like if each row updating was a single closed process. So that rows updating is not done sequentially from the first row to the last. I hope I've sufficiently detailed my problem. Currently I feel like I am at a dead-end. Could someone please show me somewhere to start from?

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• Why Switch/Case and not If/Else If?

  - by OB OB

  This question in mainly pointed at C/C++, but I guess other languages are relevant as well. I can't understand why is switch/case still being used instead of if/else if. It seems to me much like using goto's, and results in the same sort of messy code, while the same results could be acheived with if/else if's in a much more organized manner. Still, I see these blocks around quite often. A common place to find them is near a message-loop (WndProc...), whereas these are among the places when they raise the heaviest havoc: variables are shared along the entire block, even when not propriate (and can't be initialized inside it). Extra attention has to be put on not dropping break's, and so on... Personally, I avoid using them, and I wonder wether I'm missing something? Are they more efficient than if/else's? Are they carried on by tradition?

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• WinUSB application or User-Mode Driver as a filter driver for USB Analysis/Sniffer/Trending

  - by Robert

  A question to maybe some who have worked extensively with WinUSB APIs or use mode USB drivers - Does anyone know if the WinUSB API or a user mode driver can be used as a passive observer of USB connections, capturing notification of interrupts, control requests, data transfers...etc without interfering with other applications (such as iTunes) which would obviously require concurrent access to the device at the same time my application is monitoring the connection and displaying data on it? Or do you pretty much have to write a kernel-mode filter driver and inject yourself in the USB stack in order to make that happen? In the past, there have been a few credible options (libusb-win32 and usbsnoop to be specific) though both are built around the old DDK, not the Windows Driver Foundation, and are not really supported on a regular basis any more. I'm hesitant to build something significant around them, as a result.

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