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  • Do WPF ComboBox SelectedIndex and SelectedValue have different behavior on SelectionChanged event?

    - by Junior Mayhé
    Hello guys I got this cbxJobPosition_SelectionChanged firing as expected. The problem is when a external method tries to set cbxJobPosition. cbxJobPosition is databinded with a list of objects of type JobPosition: JobPositionID: 1, JobPositionName: Manager JobPositionID: 2, JobPositionName: Employee JobPositionID: 3, JobPositionName: Third party Here's the XAML: <ComboBox Cursor="Hand" DataContext="{Binding}" ItemsSource="{Binding}" FontSize="13" Name="cbxJobPosition" SelectedValuePath="JobPositionID" DisplayMemberPath="JobPositionName" SelectedIndex="0" Width="233" Height="23" SelectionChanged="cbxJobPosition_SelectionChanged" /> On UserControl_Loaded method, it reads from database the list of jobs and try to set the specific job position "Third party": //calls cbxJobPosition_SelectionChanged and passes the correct SelectedValue within cbxJobPosition.SelectedIndex = 3; //calls cbxJobPosition_SelectionChanged and but won't pass the correct SelectedValue within cbxJobPosition.SelectedValue = "3"; As you can notice, when the processing is automatically redirected to cbxJobPosition_SelectionChanged, the SelectedValue attribute will have different values for each statement above when you're debugging within cbxJobPosition_SelectionChanged event. Does anyone know if this difference is expected, am I missing something or it could be a bug?

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  • Open payment gateway libraries for Java, Python, Ruby, and PHP

    - by Tauren
    I'm looking for generic and open source payment libraries that support many different payment processor APIs. In other words, I'd like to develop an application using a single payment processing API, but be able to easily switch between payment gateways, such as Authorize.Net, Payflow Pro, Braintree, PayPal, Google, Amazon, etc. This question gives some Java solutions, but the suggestions all look horrible. Isn't there anything more like ActiveMerchant for Java? I really need a good Java solution, to the point of building my own if necessary. But I don't want to reinvent the wheel if it exists. Are there any solutions for Python or PHP? Ideally, I'd like to find something similar to Ruby's ActiveMerchant, which looks exceptionally complete. Are there any other Ruby solutions?

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  • AJAX get data from large HTML page as the large HTML page loads

    - by Ed
    Not entirely sure whether this has a name but basically I have a large HTML page that is generated from results in a db. So viewing the HTML page (which is a report) in a browser directly does not display all contents immediately but displays what it has and additional HTML is added as the results from the DB are retrieved... Is there a way I can make an AJAX request to this HTML page and as opposed to waiting until the whole page (report) is ready, I can start processing the response as the HTML report is loaded? Or is there another way of doing it? Atm I make my AJAX response it just sits there for a minute or two until the HTML page is complete... If context is of any use: The HTML report is generated by a Java servlet and the page making the AJAX call is a JSP page. Unfortunately I can't very easily break the report up because it is generated by BIRT (Eclipse reporting extension). Thanks in advance.

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  • threaded serial port IOException when writing

    - by John McDonald
    Hi, I'm trying to write a small application that simply reads data from a socket, extracts some information (two integers) from the data and sends the extracted information off on a serial port. The idea is that it should start and just keep going. In short, it works, but not for long. After a consistently short period I start to receive IOExceptions and socket receive buffer is swamped. The thread framework has been taken from the MSDN serial port example. The delay in send(), readThread.Join(), is an effort to delay read() in order to allow serial port interrupt processing a chance to occur, but I think I've misinterpreted the join function. I either need to sync the processes more effectively or throw some data away as it comes in off the socket, which would be fine. The integer data is controlling a pan tilt unit and I'm sure four times a second would be acceptable, but not sure on how to best acheive either, any ideas would be greatly appreciated, cheers. using System; using System.Collections.Generic; using System.Text; using System.IO.Ports; using System.Threading; using System.Net; using System.Net.Sockets; using System.IO; namespace ConsoleApplication1 { class Program { static bool _continue; static SerialPort _serialPort; static Thread readThread; static Thread sendThread; static String sendString; static Socket s; static int byteCount; static Byte[] bytesReceived; // synchronise send and receive threads static bool dataReceived; const int FIONREAD = 0x4004667F; static void Main(string[] args) { dataReceived = false; readThread = new Thread(Read); sendThread = new Thread(Send); bytesReceived = new Byte[16384]; // Create a new SerialPort object with default settings. _serialPort = new SerialPort("COM4", 38400, Parity.None, 8, StopBits.One); // Set the read/write timeouts _serialPort.WriteTimeout = 500; _serialPort.Open(); string moveMode = "CV "; _serialPort.WriteLine(moveMode); s = null; IPHostEntry hostEntry = Dns.GetHostEntry("localhost"); foreach (IPAddress address in hostEntry.AddressList) { IPEndPoint ipe = new IPEndPoint(address, 10001); Socket tempSocket = new Socket(ipe.AddressFamily, SocketType.Stream, ProtocolType.Tcp); tempSocket.Connect(ipe); if (tempSocket.Connected) { s = tempSocket; s.ReceiveBufferSize = 16384; break; } else { continue; } } readThread.Start(); sendThread.Start(); while (_continue) { Thread.Sleep(10); ;// Console.WriteLine("main..."); } readThread.Join(); _serialPort.Close(); s.Close(); } public static void Read() { while (_continue) { try { //Console.WriteLine("Read"); if (!dataReceived) { byte[] outValue = BitConverter.GetBytes(0); // Check how many bytes have been received. s.IOControl(FIONREAD, null, outValue); uint bytesAvailable = BitConverter.ToUInt32(outValue, 0); if (bytesAvailable > 0) { Console.WriteLine("Read thread..." + bytesAvailable); byteCount = s.Receive(bytesReceived); string str = Encoding.ASCII.GetString(bytesReceived); //str = Encoding::UTF8->GetString( bytesReceived ); string[] split = str.Split(new Char[] { '\t', '\r', '\n' }); string filteredX = (split.GetValue(7)).ToString(); string filteredY = (split.GetValue(8)).ToString(); string[] AzSplit = filteredX.Split(new Char[] { '.' }); filteredX = (AzSplit.GetValue(0)).ToString(); string[] ElSplit = filteredY.Split(new Char[] { '.' }); filteredY = (ElSplit.GetValue(0)).ToString(); // scale values int x = (int)(Convert.ToInt32(filteredX) * 1.9); string scaledAz = x.ToString(); int y = (int)(Convert.ToInt32(filteredY) * 1.9); string scaledEl = y.ToString(); String moveAz = "PS" + scaledAz + " "; String moveEl = "TS" + scaledEl + " "; sendString = moveAz + moveEl; dataReceived = true; } } } catch (TimeoutException) {Console.WriteLine("timeout exception");} catch (NullReferenceException) {Console.WriteLine("Read NULL reference exception");} } } public static void Send() { while (_continue) { try { if (dataReceived) { // sleep Read() thread to allow serial port interrupt processing readThread.Join(100); // send command to PTU dataReceived = false; Console.WriteLine(sendString); _serialPort.WriteLine(sendString); } } catch (TimeoutException) { Console.WriteLine("Timeout exception"); } catch (IOException) { Console.WriteLine("IOException exception"); } catch (NullReferenceException) { Console.WriteLine("Send NULL reference exception"); } } } } }

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  • Can't install psycopg2 (Python2.6 Ubuntu9.10 PostgreSQL8.4.2)

    - by yuv
    $ ~/psycopg2-2.0.13$ python setup.py install running install running build running build_py creating build creating build/lib.linux-x86_64-2.6 creating build/lib.linux-x86_64-2.6/psycopg2 copying lib/init.py - build/lib.linux-x86_64-2.6/psycopg2 copying lib/pool.py - build/lib.linux-x86_64-2.6/psycopg2 copying lib/extensions.py - build/lib.linux-x86_64-2.6/psycopg2 copying lib/errorcodes.py - build/lib.linux-x86_64-2.6/psycopg2 copying lib/extras.py - build/lib.linux-x86_64-2.6/psycopg2 copying lib/tz.py - build/lib.linux-x86_64-2.6/psycopg2 copying lib/psycopg1.py - build/lib.linux-x86_64-2.6/psycopg2 running build_ext error: No such file or directory or $ sudo easy_install psycopg2==2.0.13 Searching for psycopg2==2.0.13 Reading http;//pypi.python.org/simple/psycopg2/ Reading http;//initd.org/projects/psycopg2 Reading http;//initd.org/pub/software/psycopg/ Best match: psycopg2 2.0.13 Downloading http;//initd.org/pub/software/psycopg/psycopg2-2.0.13.tar.gz Processing psycopg2-2.0.13.tar.gz Running psycopg2-2.0.13/setup.py -q bdist_egg --dist-dir /tmp/easy_install-QuViWt/psycopg2-2.0.13/egg-dist-tmp-P2W9Dh error: Setup script exited with error: No such file or directory thanks in advance

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  • Text mining with PHP

    - by garyc40
    Hi, I'm doing a project for a college class I'm taking. I'm using PHP to build a simple web app that classify tweets as "positive" (or happy) and "negative" (or sad) based on a set of dictionaries. The algorithm I'm thinking of right now is Naive Bayes classifier or decision tree. However, I can't find any PHP library that helps me do some serious language processing. Python has NLTK (http://www.nltk.org). Is there anything like that for PHP? I'm planning to use WEKA as the back end of the web app (by calling Weka in command line from within PHP), but it doesn't seem that efficient. Do you have any idea what I should use for this project? Or should I just switch to Python? Thanks

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  • Linq To SQL - Specified cast is not valid - SingleOrDefault()

    - by NullReference
    I am trying to do the following... Request request = (from r in db.Requests where r.Status == "Processing" && r.Locked == false select r).SingleOrDefault(); It is throwing the following exception... Message: Specified cast is not valid. StackTrace: at System.Data.Linq.SqlClient.SqlProvider.Execute(Expression query, QueryInfo queryInfo, IObjectReaderFactory factory, Object[] parentArgs, Object[] userArgs, ICompiledSubQuery[] subQueries, Object lastResult) at System.Data.Linq.SqlClient.SqlProvider.ExecuteAll(Expression query, QueryInfo[] queryInfos, IObjectReaderFactory factory, Object[] userArguments, ICompiledSubQuery[] subQueries) at System.Data.Linq.SqlClient.SqlProvider.System.Data.Linq.Provider.IProvider.Execute(Expression query) at System.Data.Linq.DataQuery1.System.Linq.IQueryProvider.Execute[S](Expression expression) at System.Linq.Queryable.SingleOrDefault[TSource](IQueryable1 source) at GDRequestProcessor.Worker.GetNextRequest() Can anyone help me? Thanks in advance!

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  • Simple iPhone drawing app with Quartz 2D

    - by Mr guy 4
    I am making a simple iPhone drawing program as a personal side-project. I capture touches event in a subclassed UIView and render the actual stuff to a seperate CGLayer. After each render, I call [self setNeedsLayout] and in the drawRect: method I draw the CGLayer to the screen context. This all works great and performs decently for drawing rectangles. However, I just want a simple "freehand" mode like a lot of other iPhone applications have. The way I thought to do this was to create a CGMutablePath, and simply: CGMutablePathRef path; -(void)touchBegan { path = CGMutablePathCreate(); } -(void)touchMoved { CGPathMoveToPoint(path,NULL,x,y); CGPathAddLineToPoint(path,NULL,x,y); } -(void)drawRect:(CGContextRef)context { CGContextBeginPath(context); CGContextAddPath(context,path); CGContextStrokePath(context); } However, after drawing for more than 1 second, performance degrades miserably. I would just draw each line into the off-screen CGLayer, if it were not for variable opacity! The less-than-100% opacity causes dots to be left on the screen connecting the lines. I have looked at CGContextSetBlendingMode() but alas I cannot find an answer. Can anyone point me in the right direction? Other iPhone apps are able to do this with very good efficiency.

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  • How to overcome vc++ warning C4003 while writing common code for both gcc and vc++

    - by compbugs
    I have a code that is compiled in both gcc and vc++. The code has a common macro which is called in two scenarios. When we pass some parameters to it. When we don't want to pass any parameters to it. An example of such a code is: #define B(X) A1##X int main() { int B(123), B(); return 0; } The expect output from the pre-processing step of compilation is: int main() { int A1123, A1; return 0; } The output for both gcc and vc++ is as expected, but vc++ gives a warning: warning C4003: not enough actual parameters for macro 'B' How can I remove this warning and yet get the expected output? Thanks.

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  • Issues using a Fedex Webservice via WDSL/SOAP

    - by Parris
    Hi Everyone, I downloaded the sample code to request a rate from fedex's website... i placed the WSDL file in the proper location, I have my acct number, password, meter number, and key. When I run the script I get this error: Error in processing transaction. ERROR prof 1000 Authentication Failed The script they give is as follows, and yes i do actually replace the XXX and YYY everywhere it says.: <?php // Copyright 2009, FedEx Corporation. All rights reserved. // Version 7.0.0 require_once('fedex-common.php5'); $newline = "<br />"; //The WSDL is not included with the sample code. //Please include and reference in $path_to_wsdl variable. $path_to_wsdl = "RateService_v7.wsdl"; ini_set("soap.wsdl_cache_enabled", "0"); $client = new SoapClient($path_to_wsdl, array('trace' => 1)); // Refer to http://us3.php.net/manual/en/ref.soap.php for more information $request['WebAuthenticationDetail'] = array('UserCredential' => array('Key' => 'XXX', 'Password' => 'YYY')); // Replace 'XXX' and 'YYY' with FedEx provided credentials $request['ClientDetail'] = array('AccountNumber' => 'XXX', 'MeterNumber' => 'YYY');// Replace 'XXX' with your account and meter number $request['TransactionDetail'] = array('CustomerTransactionId' => ' *** Rate Request v7 using PHP ***'); $request['Version'] = array('ServiceId' => 'crs', 'Major' => '7', 'Intermediate' => '0', 'Minor' => '0'); $request['ReturnTransitAndCommit'] = true; $request['RequestedShipment']['DropoffType'] = 'REGULAR_PICKUP'; // valid values REGULAR_PICKUP, REQUEST_COURIER, ... $request['RequestedShipment']['ShipTimestamp'] = date('c'); $request['RequestedShipment']['ServiceType'] = 'FEDEX_GROUND'; // valid values STANDARD_OVERNIGHT, PRIORITY_OVERNIGHT, FEDEX_GROUND, ... $request['RequestedShipment']['PackagingType'] = 'YOUR_PACKAGING'; // valid values FEDEX_BOX, FEDEX_PAK, FEDEX_TUBE, YOUR_PACKAGING, ... $request['RequestedShipment']['Shipper'] = array('Address' => array( 'StreetLines' => array('10 Fed Ex Pkwy'), // Origin details 'City' => 'Memphis', 'StateOrProvinceCode' => 'TN', 'PostalCode' => '38115', 'CountryCode' => 'US')); $request['RequestedShipment']['Recipient'] = array('Address' => array ( 'StreetLines' => array('13450 Farmcrest Ct'), // Destination details 'City' => 'Herndon', 'StateOrProvinceCode' => 'VA', 'PostalCode' => '20171', 'CountryCode' => 'US')); $request['RequestedShipment']['ShippingChargesPayment'] = array('PaymentType' => 'SENDER', 'Payor' => array('AccountNumber' => 'XXX', // Replace 'XXX' with payor's account number 'CountryCode' => 'US')); $request['RequestedShipment']['RateRequestTypes'] = 'ACCOUNT'; $request['RequestedShipment']['RateRequestTypes'] = 'LIST'; $request['RequestedShipment']['PackageCount'] = '2'; $request['RequestedShipment']['PackageDetailSpecified'] = true; $request['RequestedShipment']['PackageDetail'] = 'INDIVIDUAL_PACKAGES'; // Or PACKAGE_SUMMARY $request['RequestedShipment']['RequestedPackageLineItems'] = array('0' => array('Weight' => array('Value' => 2.0, 'Units' => 'LB'), 'Dimensions' => array('Length' => 10, 'Width' => 10, 'Height' => 3, 'Units' => 'IN')), '1' => array('Weight' => array('Value' => 5.0, 'Units' => 'LB'), 'Dimensions' => array('Length' => 20, 'Width' => 20, 'Height' => 10, 'Units' => 'IN'))); try { $response = $client ->getRates($request); if ($response -> HighestSeverity != 'FAILURE' && $response -> HighestSeverity != 'ERROR') { printRequestResponse($client); } else { echo 'Error in processing transaction.'. $newline. $newline; foreach ($response -> Notifications as $notification) { if(is_array($response -> Notifications)) { echo $notification -> Severity; echo ': '; echo $notification -> Message . $newline; } else { echo $notification . $newline; } } } writeToLog($client); // Write to log file } catch (SoapFault $exception) { printFault($exception, $client); } ?> I am not quite sure why it isn't working, i've read about using a proxy, but I am not quite sure how i would use it in this case? Isn't the point of using SOAP and WSDL to avoid using CURL, Direct Connect type stuff?

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  • JQuery Validation Plugin: Use Custom Ajax Method

    - by namtax
    Hi Looking for some assistance with the Jquery form validation plugin if possible. I am validating the email field of my form on blur by making an ajax call to my database, which checks if the text in the email field is currently in the database. // Check email validity on Blur $('#sEmail').blur(function(){ // Grab Email From Form var itemValue = $('#sEmail').val(); // Serialise data for ajax processing var emailData = { sEmail: itemValue } // Do Ajax Call $.getJSON('http://localhost:8501/ems/trunk/www/cfcs/admin_user_service.cfc?method=getAdminUserEmail&returnFormat=json&queryformat=column', emailData, function(data){ if (data != false) { var errorMessage = 'This email address has already been registered'; } else { var errorMessage = 'Good' } }) }); What I would like to do, is encorporate this call into the rules of my JQuery Validation Plugin...e.g $("#setAdminUser").validate({ rules:{ sEmail: { required: function(){ // Replicate my on blur ajax email call here } }, messages:{ sEmail: { required: "this email already exists" } }); Wondering if there is anyway of achieving this? Many thanks

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  • How to pass Multivalued parameters through URL in SSRS 2005

    - by Kali Charan Tripathi
    Hi All, I have main matrix report and I want to navigate my sub report from main report by Jump To URL:(Using below JavaScript function) method. ="javascript:void(window.open('http://localhost/ReportServer/Pages/ReportViewer.aspx?%2fKonsolidata_Data_Exporting_Project%2fEXPORT_REPORT_TEST&rs:Command=Render&RP_cntry="+Fields!STD_CTRY_NM.Value+"&RP_cll_typ_l1="+Join(Parameters!RP_cll_typ_l1.Value,",")+"'))" It is ok for the Single valued but giving exception for the multivalued Like An error has occurred during report processing. (rsProcessingAborted) Cannot read the next data row for the data set DS_GRID_DATA. (rsErrorReadingNextDataRow) Conversion failed when converting the nvarchar value '1,2,3,4' to data type int. Basically I have defined Parameters!RP_cll_typ_l1 as multivalued into my subreport as per ssrs multivalued parameter passing method. The value is going on sub report as '1,2,3,4' (not understandable by data set) It should be like as '1’,’2’,’3’,’4' or 1,2,3,4 How can I resolve this please help if any have solution? Thanks Kali Charan Tripathi(India) [email protected] [email protected]

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  • Web-design / UI advice

    - by Damian
    I'm working on a website on a Fmylife style. Now the homepage is the page showing the list of the latest posts. But I think there is a problem with that: The most "interesting" page is the one showing the top posts of the last days, but that page has very few visits compared to the main page. I suppose that's only because the main page is the "default" one. So, I've been thinking of making a home page that shows no posts (only one at the top of the page) but 4 big buttons showing the visitors what are the options to browse the content. But I'm also afraid that most users will not click any option and leave the site having seen no posts. So I don't know what to do. Obviously I have no idea of what will be good from a usability/efficiency point of view. Maybe a mix of the two options will be the best, but I don't know how to mix them. Any advice or idea will be greatly appreciated. The current home page looks like this: http://soquestion.latest.secretsapp.appspot.com/latest The new home page would look like this: http://soquestion.latest.secretsapp.appspot.com/

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  • Prolog : Simple question

    - by abduls85
    I want to add any strings user entered into a list run :- write('How many students you have: '),read(x),nl. enterNameOfStudents(x). enterNameOfStudents(x) :- for(A, 1, x, 1),write('Please enter the names of students'),read(A),??????,nl,fail. What do i put in the ?????? portion to ensure that whatever the user enter will go into a user-defined list which will be used for further processing later ? Please help. I have tried numerous stuff like append and other but it does not work :(

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  • RequestDispatcher forward between Tomcat instances

    - by MontyBongo
    I have a scenario where I have single entry point Servlet and further Servlets that requests are forwarded to that undertake heavy processing. I am looking at options to distribute this load and I would like to know if it is possible using Tomcat or another platform to forward requests between Servlets sitting on different servers using a cluster type configuration or similar. I have found some documentation on clustering Servlets and Tomcat but none indicate if Servlet request forwarding is possible from what I can see. http://java.sun.com/blueprints/guidelines/designing_enterprise_applications_2e/web-tier/web-tier5.html http://tomcat.apache.org/tomcat-5.5-doc/cluster-howto.html

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  • Workflow Foundation 4 WorkflowServiceHost Message Correlation

    - by Lygpt
    I have 2 methods on a workflow service hosted in WorkflowServiceHost. The first method is called and starts the regular workflow sequence - talking to other web services, database work etc but on some occassions will pause and persist to db (as-in the delay activity) and wait for some human action to take place before continuing. I need my second method to be able to hook into this persisted workflow, change a local variable and then continuing processing. I have looked at message based correlation in workflow but can only seem to find examples where some kind of infinite while loop keeps the workflow instance active so that the second service method call can arrive whilst it's still running. Because my workflow instance will be delayed/persisted, the second service call doesn't seem to get anywhere (I can't have an infinite while loop keeping the workflow instance active). I hope this makes sense - cheers!

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  • What are best practices for collecting, maintaining and ensuring accuracy of a huge data set?

    - by Kyle West
    I am posing this question looking for practical advice on how to design a system. Sites like amazon.com and pandora have and maintain huge data sets to run their core business. For example, amazon (and every other major e-commerce site) has millions of products for sale, images of those products, pricing, specifications, etc. etc. etc. Ignoring the data coming in from 3rd party sellers and the user generated content all that "stuff" had to come from somewhere and is maintained by someone. It's also incredibly detailed and accurate. How? How do they do it? Is there just an army of data-entry clerks or have they devised systems to handle the grunt work? My company is in a similar situation. We maintain a huge (10-of-millions of records) catalog of automotive parts and the cars they fit. We've been at it for a while now and have come up with a number of programs and processes to keep our catalog growing and accurate; however, it seems like to grow the catalog to x items we need to grow the team to y. I need to figure some ways to increase the efficiency of the data team and hopefully I can learn from the work of others. Any suggestions are appreciated, more though would be links to content I could spend some serious time reading. THANKS! Kyle

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  • Asynchronous operations performance

    - by LicenseQ
    One of the features of asynchronous programming in .NET is saving threads during long running operation execution. The FileStream class can be setup to allow asynchronous operations, that allows running (e.g.) a copy operation without virtually using any threads. To my surprise, I found that running asynchronous stream copy performs not only slower, but also uses more processing power than synchronous stream copy equivalent. Is there any benchmark tests were done to compare a synchronous vs asynchronous operation execution (file, network, etc.)? Does it really make sense to perform an asynchronous operation instead of spanning separate thread and perform synchronous operation in server environment if the asynchronous operation is times slower than the synchronous one?

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  • Extracting ""((Adj|Noun)+|((Adj|Noun)(Noun-Prep)?)(Adj|Noun))Noun"" from Text (Justeson & Katz, 1995)

    - by ssuhan
    I would like to query if it is possible to extract ((Adj|Noun)+|((Adj|Noun)(Noun-Prep)?)(Adj|Noun))Noun proposed by Justeson and Katz (1995) in R package openNLP? That is, I would like to use this linguistic filtering to extract candidate noun phrases. I cannot well understand its meaning. Could you do me a favor to explain it or transform such representation into R language. Many thanks. Maybe we can start the sample code from: library("openNLP") acq <- "This paper describes a novel optical thread plug gauge (OTPG) for internal thread inspection using machine vision. The OTPG is composed of a rigid industrial endoscope, a charge-coupled device camera, and a two degree-of-freedom motion control unit. A sequence of partial wall images of an internal thread are retrieved and reconstructed into a 2D unwrapped image. Then, a digital image processing and classification procedure is used to normalize, segment, and determine the quality of the internal thread." acqTag <- tagPOS(acq) acqTagSplit = strsplit(acqTag," ")

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  • Creating an independent draw thread using pthreads (C++)

    - by sagekilla
    Hi all, I'm working on a graphical application which looks something like this: while (Simulator.simulating) { Simulator.update(); InputManager.processInput(); VideoManager.draw(); } I do this several times a second, and in the vast majority of cases my computation will be taking up 90 - 99% of my processing time. What I would like to do is take out the processInput and draw functions and have each one run independently. That way, I can have the input thread always checking for input (at a reasonable rate), and the draw thread attempting to redraw at a given frame rate. My issue is I'm not sure how I can properly do this. How would I properly initialize my pthread_t and associated pthread_attr_t so that the thread runs without blocking what I'm doing? Any help or even a link is appreciated, thanks!

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  • Spring security request matcher is not working with regex

    - by Felipe Cardoso Martins
    Using Spring MVC + Security I have a business requirement that the users from SEC (Security team) has full access to the application and FRAUD (Anti-fraud team) has only access to the pages that URL not contains the words "block" or "update" with case insensitive. Bellow, all spring dependencies: $ mvn dependency:tree | grep spring [INFO] +- org.springframework:spring-webmvc:jar:3.1.2.RELEASE:compile [INFO] | +- org.springframework:spring-asm:jar:3.1.2.RELEASE:compile [INFO] | +- org.springframework:spring-beans:jar:3.1.2.RELEASE:compile [INFO] | +- org.springframework:spring-context:jar:3.1.2.RELEASE:compile [INFO] | +- org.springframework:spring-context-support:jar:3.1.2.RELEASE:compile [INFO] | \- org.springframework:spring-expression:jar:3.1.2.RELEASE:compile [INFO] +- org.springframework:spring-core:jar:3.1.2.RELEASE:compile [INFO] +- org.springframework:spring-web:jar:3.1.2.RELEASE:compile [INFO] +- org.springframework.security:spring-security-core:jar:3.1.2.RELEASE:compile [INFO] | \- org.springframework:spring-aop:jar:3.0.7.RELEASE:compile [INFO] +- org.springframework.security:spring-security-web:jar:3.1.2.RELEASE:compile [INFO] | +- org.springframework:spring-jdbc:jar:3.0.7.RELEASE:compile [INFO] | \- org.springframework:spring-tx:jar:3.0.7.RELEASE:compile [INFO] +- org.springframework.security:spring-security-config:jar:3.1.2.RELEASE:compile [INFO] +- org.springframework.security:spring-security-acl:jar:3.1.2.RELEASE:compile Bellow, some examples of mapped URL path from spring log: Mapped URL path [/index] onto handler 'homeController' Mapped URL path [/index.*] onto handler 'homeController' Mapped URL path [/index/] onto handler 'homeController' Mapped URL path [/cellphone/block] onto handler 'cellphoneController' Mapped URL path [/cellphone/block.*] onto handler 'cellphoneController' Mapped URL path [/cellphone/block/] onto handler 'cellphoneController' Mapped URL path [/cellphone/confirmBlock] onto handler 'cellphoneController' Mapped URL path [/cellphone/confirmBlock.*] onto handler 'cellphoneController' Mapped URL path [/cellphone/confirmBlock/] onto handler 'cellphoneController' Mapped URL path [/user/update] onto handler 'userController' Mapped URL path [/user/update.*] onto handler 'userController' Mapped URL path [/user/update/] onto handler 'userController' Mapped URL path [/user/index] onto handler 'userController' Mapped URL path [/user/index.*] onto handler 'userController' Mapped URL path [/user/index/] onto handler 'userController' Mapped URL path [/search] onto handler 'searchController' Mapped URL path [/search.*] onto handler 'searchController' Mapped URL path [/search/] onto handler 'searchController' Mapped URL path [/doSearch] onto handler 'searchController' Mapped URL path [/doSearch.*] onto handler 'searchController' Mapped URL path [/doSearch/] onto handler 'searchController' Bellow, a test of the regular expressions used in spring-security.xml (I'm not a regex speciality, improvements are welcome =]): import java.util.Arrays; import java.util.List; public class RegexTest { public static void main(String[] args) { List<String> pathSamples = Arrays.asList( "/index", "/index.*", "/index/", "/cellphone/block", "/cellphone/block.*", "/cellphone/block/", "/cellphone/confirmBlock", "/cellphone/confirmBlock.*", "/cellphone/confirmBlock/", "/user/update", "/user/update.*", "/user/update/", "/user/index", "/user/index.*", "/user/index/", "/search", "/search.*", "/search/", "/doSearch", "/doSearch.*", "/doSearch/"); for (String pathSample : pathSamples) { System.out.println("Path sample: " + pathSample + " - SEC: " + pathSample.matches("^.*$") + " | FRAUD: " + pathSample.matches("^(?!.*(?i)(block|update)).*$")); } } } Bellow, the console result of Java class above: Path sample: /index - SEC: true | FRAUD: true Path sample: /index.* - SEC: true | FRAUD: true Path sample: /index/ - SEC: true | FRAUD: true Path sample: /cellphone/block - SEC: true | FRAUD: false Path sample: /cellphone/block.* - SEC: true | FRAUD: false Path sample: /cellphone/block/ - SEC: true | FRAUD: false Path sample: /cellphone/confirmBlock - SEC: true | FRAUD: false Path sample: /cellphone/confirmBlock.* - SEC: true | FRAUD: false Path sample: /cellphone/confirmBlock/ - SEC: true | FRAUD: false Path sample: /user/update - SEC: true | FRAUD: false Path sample: /user/update.* - SEC: true | FRAUD: false Path sample: /user/update/ - SEC: true | FRAUD: false Path sample: /user/index - SEC: true | FRAUD: true Path sample: /user/index.* - SEC: true | FRAUD: true Path sample: /user/index/ - SEC: true | FRAUD: true Path sample: /search - SEC: true | FRAUD: true Path sample: /search.* - SEC: true | FRAUD: true Path sample: /search/ - SEC: true | FRAUD: true Path sample: /doSearch - SEC: true | FRAUD: true Path sample: /doSearch.* - SEC: true | FRAUD: true Path sample: /doSearch/ - SEC: true | FRAUD: true Tests Scenario 1 Bellow, the important part of spring-security.xml: <security:http entry-point-ref="entryPoint" request-matcher="regex"> <security:intercept-url pattern="^.*$" access="ROLE_SEC" /> <security:intercept-url pattern="^(?!.*(?i)(block|update)).*$" access="ROLE_FRAUD" /> <security:access-denied-handler error-page="/access-denied.html" /> <security:form-login always-use-default-target="false" login-processing-url="/doLogin.html" authentication-failure-handler-ref="authFailHandler" authentication-success-handler-ref="authSuccessHandler" /> <security:logout logout-url="/logout.html" success-handler-ref="logoutSuccessHandler" /> </security:http> Behaviour: FRAUD group **can't" access any page SEC group works fine Scenario 2 NOTE that I only changed the order of intercept-url in spring-security.xml bellow: <security:http entry-point-ref="entryPoint" request-matcher="regex"> <security:intercept-url pattern="^(?!.*(?i)(block|update)).*$" access="ROLE_FRAUD" /> <security:intercept-url pattern="^.*$" access="ROLE_SEC" /> <security:access-denied-handler error-page="/access-denied.html" /> <security:form-login always-use-default-target="false" login-processing-url="/doLogin.html" authentication-failure-handler-ref="authFailHandler" authentication-success-handler-ref="authSuccessHandler" /> <security:logout logout-url="/logout.html" success-handler-ref="logoutSuccessHandler" /> </security:http> Behaviour: SEC group **can't" access any page FRAUD group works fine Conclusion I did something wrong or spring-security have a bug. The problem already was solved in a very bad way, but I need to fix it quickly. Anyone knows some tricks to debug better it without open the frameworks code? Cheers, Felipe

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  • Readdirectorychanges not working with big file

    - by sanky
    i was working with readdirectorychangesW till i encountered an unwanted behavior.below is short reference the way i am using my readdirectorychanges func. The behavior is that in case a big file in GBs is copied to the watched directory i get the notification immediately and thereby i start doing my operation according to the notification i receive ,but the file IO ( copy operation is still pending) and that results in unxpected state. Can anyone please suggest a way to synchronize this operation. I want the copy operation(that gave me notification) to get completed first then i want to do my processing. while(ReadDirectoryChangesW( hDir, pBuffer, nBufSize, FALSE, FILE_NOTIFY_CHANGE_FILE_NAME, &BytesReturned, NULL, NULL )) { pBufferCurrent = pBuffer; while(pBufferCurrent) { switch(pBufferCurrent->Action) { case FILE_ACTION_ADDED: break; default: break; } if (pBufferCurrent->NextEntryOffset) pBufferCurrent = (FILE_NOTIFY_INFORMATION*)(((oef_u8_t*)pBufferCurrent) + pBufferCurrent->NextEntryOffset); else pBufferCurrent = NULL; }

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  • Ignoring 'A' and 'The' when sorting with XSLT

    - by ChrisV
    I would like to have a list sorted ignoring any initial definite/indefinite articles 'the' and 'a'. For instance: The Comedy of Errors Hamlet A Midsummer Night's Dream Twelfth Night The Winter's Tale I think perhaps in XSLT 2.0 this could be achieved along the lines of: <xsl:template match="/"> <xsl:for-each select="play"/> <xsl:sort select="if (starts-with(title, 'A ')) then substring(title, 2) else if (starts-with(title, 'The ')) then substring(title, 4) else title"/> <p><xsl:value-of select="title"/></p> </xsl:for-each> </xsl:template> However, I want to use in-browser processing, so have to use XSLT 1.0. Is there any way to achieve this in XLST 1.0?

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  • C# - Can FileHelper FieldConverter routines refer to other fields in the record?

    - by Pete
    I am using the excellent FileHelpers library to process a fixed-length airline schedule file. I have a date field, then a few fields later on in the record, a time field. I want to combine both of these in the FileHelpers record class, and know there is a custom FieldConverter attribute. With this attribute, you provide a custom function to handle your field data and implement StringToField and FieldToString. My question is: can I pass other fields (already read) to this customer FieldConverter too, so I can combine Date and Time together. FieldConverter has an implementation that allows you to refer to both a custom processing class AND 'other strings' or even an array of object. But, given this is done in the attribute definition, I am struggling to access this earlier-field reference. [FieldFixedLength(4)] [FieldConverter(typeof(MyTimeConverter),"eg. ScheduledDepartureDate")] public DateTime scheduledDepartureTime;

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  • Using Nearest Neighbour Algorithm for image pattern recognition

    - by user293895
    So I want to be able to recognise patterns in images (such as a number 4), I have been reading about different algorithms and I would really like to use the Nearest Neighbour algorithm, it looks simple and I do understand it based on this tutorial: http://people.revoledu.com/kardi/tutorial/KNN/KNN_Numerical-example.html Problem is, although I understand how to use it to fill in missing data sets, I don't understand how I could use it as a pattern recognition tool to aim in Image Shape Recognition. Could someone please shed some light as to how this algorithm could work for pattern recognition? I have seen tutorials using OpenCV, however I don't really want to use this library as I have the ability to do the pre-processing myself, and it seems silly that I would implement this library just for what should be a simple nearest neighbour algorithm.

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