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  • How to learn to program C the right way

    - by sfactor
    i have been programming in C/C++ for my academic courses a lot and was under the impression i had a pretty good grasp of it. but lately i had to work in a bluetooth application that had a server and client implementation in a Linux box and an embedded system. i learned bluez bluetooth API, socket/network programming and coded it. however i ran into a lot of problems with memory leaks and segmentation faults and other memory related errors along the way.as the code grew more complex i all but lost control of the pointers and threads and sockets. this got me wondering that i had a lot to learn that they didn't say in the basic C/C++ books. so i wanted to ask for the resources that are available that'll help be code better in a professional way in C/C++ .especially for the Linux/Mac environment (gcc compiler).

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  • What documents/requirements do you need from clients to develop web projects ?

    - by kacalapy
    I have an interview coming up where I would be a consultant to a small advertising agency. They crank out web sites for clients using DNN. tTe company owner/ operator asked me what I need in order to run with something and get it done, and eluded to wire frames and a site map. I am more used to having more detailed work and in a full time company environment but in these times it looks like we all need to be a bit more flexible. Typically I have functional and non-functional specifications defined for development work. This way I can control what is in scope, manage expectations, get sign offs, track deliverables and so on. Are there any contractors out there who develop web sites andcan advise me on the best approach to this so that I don't look foolish and get burned or taken advantage of? thanks

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  • Wolfram Workbench and Mathematica Help System

    - by belisarius
    I find the Wolfram Workbench a nice environment for Mathematica development. However, as I program in Mathematica, I need to navigate the Help System very often. The Workbench provides a tooltip tool that shows a very basic help for the Mma functions (just the usage messages), and is not enough for my usual needs. So: Is there a way to bring up and navigate the whole Mma Help System from inside the Workbench? Alternative solutions are also welcome. Re-entering the function name in a notebook and pressing F1 is not :)

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  • making a gui editor

    - by Manny
    Hello, For my school project, I would like to build a gui that someone else can use to create a gui. Upon some research I saw lot of gui builders but didn't see anything along the lines of what I am looking for. But then I did find a tutorial using C# on here I rather create this gui editor for linux environment. Any suggestions to where I should start? what tools I can use? Any links to any tutorials? Any help/direction would be greatly appreciated.

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  • c# ref keyword... Am i passing my value correctly?

    - by Pandiya Chendur
    Is this a valid value for this c# class default constructor, public class SMSCOMMS { public SMSCOMMS(ref string COMMPORT) { SMSPort = new SerialPort(); SMSPort.PortName = COMMPORT; SMSPort.BaudRate = 9600; SMSPort.Parity = Parity.None; SMSPort.DataBits = 8; SMSPort.StopBits = StopBits.One; SMSPort.Handshake = Handshake.RequestToSend; SMSPort.DtrEnable = true; SMSPort.RtsEnable = true; SMSPort.NewLine = System.Environment.NewLine; ReadThread = new Thread( new System.Threading.ThreadStart(ReadPort)); } and i am passing this value, SMSCOMMS SMSEngine = new SMSCOMMS("COM6"); but it doesn't seem to take "COM6" as a valid ref string... Any suggestion..

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  • Got blue screen with a warning that I boot loader may not be properly configured, workaround?

    - by JohnHF
    After running sudo apt-get update got this message: Configuring grub-pc You chose not to install GRUB to any devices. If you continue, the boot loader may not be properly configured, and when your computer next starts up it will use whatever was previously in the boot sector. If there is an earlier version of GRUB 2 in the boot sector, it may be unable to load modules or handle the current configuration file. If you are already running a different boot loader and want to carry on doing so, or if this is a special environment where you do not need a boot loader, then you should continue anyway. Otherwise, you should install GRUB somewhere. Continue without installing GRUB? <Yes> <No> Apparently there is a bug in ubuntu 10.04. But this hang the system. Any ideas on how to fix this? All I wanted was to install gcc that is missing.

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  • WCF service hosted in IIS 5.0 - http get methods not invoked through the browser

    - by Dmitry
    I have service hosted in IIS5.0 and configured such way : ** <behaviors> <endpointBehaviors> <behavior name="GalleriesBehavior"> <webHttp/> </behavior> ** When I make request to http://localhost/sandboxWidget/Galleries.svc?Test ,the message I get is : "Metadata publishing for this service is currently disabled." and instructions how to expose meta data exchange...Tried this but doesn't help.. I can write any function name ,even not existing (http://localhost/sandboxWidget/Galleries.svc?blabla) ,but the message is same .... I'm new to Wcf ,but what looks me strange is that ,the same application was working in my job environment ,but not on my home PC .... I have same VS2008,NET3.5 with service pack 1

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  • How to support both DataContractSerializer and XMLSerializer for the same contract on the same host?

    - by Sly
    In our production environment, our WCF services are serialized with the XMLSerializer. To do so our service interfaces have the [XMLSerializerFormat] attribute. Now, we need to change to DataContractSerializer but we must stay compatible with our existing clients. Therefore, we have to expose each service with both serializers. We have one constraint: we don't want to redefine each contract interface twice, we have 50 services contract interfaces and we don't want to have IIncidentServiceXml IIncidentServiceDCS IEmployeeServiceXml IEmployeeServiceDCS IContractServiceXml IContractServiceDCS How can we do that? This is a description of what we have tried so far but I'm willing to try completely different approaches: We tried to create all the endpoints by code in our own ServiceHostFactory class. Basically we create each endpoint twice. The problem is that at runtime, WCF complains that the service has two endpoints with the same contact name but with different ContractDescription instances. The message says we should use different contract names or reuse the same ContractDescription instance.

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  • How do I safely Debug.Assert in ASP.NET?

    - by MatthewMartin
    Asserts can't be caught. This is good because some errors I don't want to be wrapped in try/catch, at least not on the development server. But Asserts seem awefully dangerous. If they get onto production, it can hang the ASP.NET server with a msgbox. //Don't want this on prod even if debug=true is in the web.config #if DEBUG //A future client programmer can wrap this in a try{}catch{} if (!EverythingIsOkay) throw new InvalidOperationException("Dagnabbit, programming error"); //This stops the but has less information that an // Exception and hangs the server if this accidentally // runs on production System.Diagnostics.Debug.Assert(!EverythingIsOkay); #endif Is there better way to communicate an violation of a inviolable condition to a developer without risking hanging IIS? UPDATE: After reading the first replies, I guess the answer hinges on a foolproof way to detect when code is running in a development environment and when it is on a production server, or figuring out how to throw an exception that can't be caught and ignored.

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  • Multi-process builds in Visual Studio 2010: Worth it?

    - by coryr
    I've started testing our C++ software with VS2010 and the build times are really bad (30-45 minutes, about double the VS2005 times). I've been reading about the /MP switch for multi-process compilation. Unfortunately, it is incompatible with some features that we use quite a bit like #import, incremental compilation, and precompiled headers. Have you had a similar project where you tried the /MP switch after turning off things like precompiled headers? Did you get faster builds? My machine is running 64-bit Windows 7 on a 4 core machine with 4 GB of RAM and a fast SSD storage. Virus scanner disabled and a pretty minimal software environment.

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  • How to show and hide preferences on Android dynamically?

    - by Japtar
    Is there a way to dynamically show and hide preferences? In my case, I have a checkbox preference that would disable or enable one of 2 preference groups ("with-" and "without-handicap" groups). While this would be the ideal GUI in a desktop environment, the "with-handicap" takes up nearly the whole screen, while the other, "without-handicap" takes up only a small portion of the screen. Rather than showing both groups at the same time, I'd like to show only one of them at a time, and dynamically show or hide the 2 groups when the checkbox changes. Is there a way to do this?

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  • WCF Authentication on the Internet - HELP

    - by Eddie
    I have a WCF service using the basicHTTP binding. The service will be targeted to be deployed in production in a DMZ environment on a Windows Server 2008 64 bit running IIS 7.0 and is not in an Active Directory domain. The service will be accessed by a business partner over the Internet with SSL protection. Originally, I had built the service to use x.509 Message authentication with wsHTTPBinding and after a lot of problems I punted and decided to back up and use basicHTTP with UserName authentication. Result: same exact, obscure error message as I received with certificate mode. The service works perfectly inside our domain with the exact same authentication but as soon as I move it to the DMZ I get an error reading: "An unsecured or incorrectly secured fault was received from the other party. See the inner FaultException for the fault code and detail". The inner exception message is: "An error occurred when verifying security for the message." The services' web config with binding configuration is as follows: <services> <service behaviorConfiguration="HSSanoviaFacade.Service1Behavior" name="HSSanoviaFacade.HSSanoviaFacade"> <endpoint address="" binding="basicHttpBinding" contract="HSSanoviaFacade.IHSSanoviaFacade" bindingConfiguration="basicHttp"> <identity> <dns value="localhost" /> </identity> </endpoint> <endpoint address="mex" binding="mexHttpsBinding" contract="IMetadataExchange" /> <host> <baseAddresses> <add baseAddress="https://FULLY QUALIFIED HOST NAME CHANGED TO PROTECT/> </baseAddresses> </host> </service> </services> <bindings> <basicHttpBinding> <binding name="basicHttp"> <security mode="TransportWithMessageCredential"> <message clientCredentialType="UserName" /> </security> </binding> </basicHttpBinding> </bindings> <behaviors> <serviceBehaviors> <behavior name="HSSanoviaFacade.Service1Behavior"> <serviceMetadata httpsGetEnabled="True" /> <serviceDebug includeExceptionDetailInFaults="True" /> </behavior> </serviceBehaviors> </behaviors> The test client's configuration that gets the error: <bindings> <basicHttpBinding> <binding name="BasicHttpBinding_IHSSanoviaFacade" closeTimeout="00:01:00" openTimeout="00:01:00" receiveTimeout="00:10:00" sendTimeout="00:01:00" allowCookies="false" bypassProxyOnLocal="false" hostNameComparisonMode="StrongWildcard" maxBufferSize="65536" maxBufferPoolSize="524288" maxReceivedMessageSize="65536" messageEncoding="Text" textEncoding="utf-8" transferMode="Buffered" useDefaultWebProxy="true"> <readerQuotas maxDepth="32" maxStringContentLength="8192" maxArrayLength="16384" maxBytesPerRead="4096" maxNameTableCharCount="16384" /> <security mode="TransportWithMessageCredential"> <transport clientCredentialType="None" proxyCredentialType="None" realm="" /> <message clientCredentialType="UserName" algorithmSuite="Default" /> </security> </binding> </basicHttpBinding> </bindings> <client> <endpoint address="https://HOST NAME CHANGED TO PROTECT" binding="basicHttpBinding" bindingConfiguration="BasicHttpBinding_IHSSanoviaFacade" contract="MembersService.IHSSanoviaFacade" name="BasicHttpBinding_IHSSanoviaFacade" /> </client> As mentioned earlier, the service works perfectly on the domain and the production IIS box is not on a domain. I have been tweaking and pulling my hair out for 2 weeks now and nothing seems to work. If anyone can help I would appreciate it. Even a recommendation for a work around for authentication. I'd rather not use a custom authentication scheme but use built-in SOAP capabilities. The credentials pass in thru the proxy i.e. proxy.ClientCredentials.UserName.UserName and proxy.ClientCredentials.UserName.Password are valid accounts on both the internal domain in the test environment and as a machine account on the DMZ IIS box.

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  • Perform manual test, automate after - or never?

    - by dotnetdev
    In my current company, we have one tester. Having spoken to this tester, she says that in testing, before implementing any automation systems, the scripts (steps to take) are manually written and performed (performed at least once). Is this the way things work in testing? To make me laugh, this has been done in this case, yet no automation. It makes me laugh to see the lead tester perform loads of different combinations of usernames and passwords for a login form (which she is not overly keen on having automated) when I could easily automate that (but politics in the company won't allow that). This doesn't seem like the environment where a junior tester (not me, I'm a SDET) cannot learn anything. Thanks

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  • JBoss as a windows service. Where can i set the JAVA_OPTS?

    - by ikky
    hi. I'm running JBoss as a windows service, but i can't seem to find where i can configure the JAVA_OPTS to make it work properly. I need to set the Xms and the Xmx. I have tried to just run JBoss manually (run.bat) and in the same file i set the JAVA_OPTS= -Xms128m -Xmx512m. And that works. Here is my install.bat where i install the JBoss as a service: set JBOSS_CLASS_PATH=%JAVA_HOME%\lib\tools.jar;%JBOSS_HOME%\bin\run.jar rem copy /Y JavaService.exe D:\PROJECT\bin\JBossService.exe JBossService.exe -install JBoss %JAVA_HOME%\jre\bin\server\jvm.dll -Djava.class.path=%JBOSS_CLASS_PATH% -start org.jboss.Main -stop org.jboss.Shutdown -method systemExit -out %PROJECT_HOME%\log\JBoss_out.log -err %PROJECT_HOME%\log\JBoss_err.log -current D:\PROJECT\bin net start JBoss When i look at the info about JBoss Application Server (http://localhost:8080/web-console/) i see this info: JVM Environment Free Memory: 9 MB Max Memory: 63 MB Total Memory: 63 MB And i MUST have more Max Memory. Does anybody know where i can set the JAVA_OPTS when running JBoss as a service?

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  • "Dynamic" java validation framework?

    - by pihentagy
    AFAIK JSR-303 is the standard bean validation system. I don't know whether it could do validations like this (I guess no): if an object has a deleted flag set, you cannot modify the object you cannot change the start date property, after the date is passed you cannot decrease some integer properties in the bean So how can I handle validations, which depend on the previous state of an object? I would like to solve problems like that in hibernate3.5 - spring3 - JPA2 environment. Thanks My solution was to mess with hibernate, reload the object to see the old state (after evicting the new object). This time I need some smarter solution...

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  • Active record taking Date.today as yesterday

    - by Mongus Pong
    I have a strange one.. I am doing something like : tip = find (:first, :conditions => ["last_shown = ? or last_shown is null", Date.today]) And then a little later on I do : tip.last_shown = Date.today tip.save When I look at output of these queries, ActiveRecord is doing the first query with todays date as I would expect. However, the send query, ActiveRecord is setting the last_shown date to be yesterdays date. Why on earth would it do this? I have config.time_zone = 'UTC' in my environment.rb. I can use Time.now.utc.to_date instead of Date.today but it makes no difference.

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  • Debugging stack data not assigned to a named variable

    - by gibbss
    Is there a way to view stack elements like un-assigned return values or exceptions that not assigned to a local variable? (e.g. throw new ...) For example, suppose I have code along the lines of: public String foo(InputStream in) throws IOException { NastyObj obj = null; try { obj = new NastyObj(in); return (obj.read()); } finally { if (obj != null) obj.close(); } } Is there any way to view the return or exception value without stepping to a higher level frame where it is assigned? This is particularly relevant with exceptions because you often have to step back up through a number of frames to find an actual handler. I usually use the Eclipse debugging environment, but any answer is appreciated. Also, if this cannot be done, can you explain why? (JVM, JPDA limitation?)

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  • iOS: is it allowed to paint outside the bounds

    - by Tbee
    If clipToBounds = YES then you can draw all you want, but you only can paint inside the bounds. If it is set to NO then painting outside the bounds is possible, but is it allowed? The reason that I'm asking is because iOS uses the concept where the environment takes care of making sure the correct parts of the screen are (re)painted (e.g. setNeedsDisplay). If I draw outside my bounds, will it goof up? I have tried it, and it seems to work, but?

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  • Is there anyway to bring web @Context into JUnit (CXF+Spring)

    - by Sudheer
    I am trying to create unit test environment to test RESTFul services (cfx+spring) in my dev environemnt. To test RESTFul Services, I require @Context within JUnit test cases. @Context should contain HttpRequest, HttpSession, ServletContext, ServletConfig and all other webserver related information. I have setup the JUnit for the above, but when I run, @Context is coming as null. This could be because there is no webserver running and there is no @Context. I am just doubting whether there is a way to created sample web @Context and pass to JUnit. Any other ideas are welcome to bring web @Context into JUnit test cases. Thank you, Sudheer

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  • Event trigger print using VC++

    - by santhosh kumar
    I have requirement to print log data continuously whenever an event trigger (Without showing print dialog, using default printer). Event may occur twice a second or minit or hour. Also i don`t bother about printer status. example out of paper, communication problem. Printer should not leave empty page. Example event 1 have 4 lines of data to print. While printing event 2, printer should print continuously instead of fetching next paper. My development environment VC++ and MFC.

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  • How are Flash library symbols constructed? Why are width/height already available in constructor?

    - by Triynko
    Suppose I draw a square on the stage, convert it to a symbol, export it for ActionScript with a classname of "MySquare" (and of course a base class of MovieClip). How is it that in the MySquare constructor, the width and height of this MovieClip are already available? In fact, any named instances in the clip are also available. I'm confused about how the Flash player seems to be able to pre-construct my movie clip by populating its properties and child clips before my constructor for the class ever runs. I thought that it would have to first construct the clip, calling my constructor code, and then construct and add any children, but obviously the player is doing something special for clips designed in the Flash authoring environment.

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  • How can i look at executed queries?

    - by taiga
    Hello, can anyone tell me how to view executed queries in SharePoint? I couldn't find a way to show query logs with SQL Server. As you know, SharePoint framework hides all queries from programmers. I would like to look into the queries and understand the mechanisms. http://www.infoq.com/articles/SharePoint-Andreas-Grabner In above article, i can see some windows showing methods and arguments(Queries). But i could not figure out where this window come from...(looks like a window from visual studio) Does anyone know how to show this window? or any alternative way to display executed queries? My working environment. Windows Server 2008 Enterprise MOSS 2007 SQL Server 2008 Enterprise Visual Studio 2008 with VSeWSS 1.2 Thank you in advance. Taiga

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  • Best Asp.net Hosting

    - by dotnetguts
    There are many asp.net web hosting companies which spends lot on advertisement and also gives you very cheaper rate, as low as $5, but when it comes to support they are simply hopeless. Everyone can you please pass your experience with your past hosting companies and suggest any good asp.net hosting company? Please consider following requirement factors Asp.net 3.5 or 4.0 supported. Url Rewriter support GZip support (Dynamic through code) Initial Setup support (If required) SQL Server 2005 or 2008 Allow to access SQL Server DB using SQL Mgmt Studio Environment supporting Backup and Restore of DB on my own, without involving tech support team Full Text Search support FTP support I can able to send atleast 500 Emails daily. 99.9% Up Time (No matter all web hosting say they have 99.9% Up Time, but its not true). Alert Email to be sent when they do any maintenance or during downtime. Hosting Price should be reasonable. Incase you feel i am missing something please add to the list. Can anyone suggest good webhosting company based on above factors?

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  • In Jenkins, how to checkout a project into a specific directory (using GIT)

    - by viebel
    Sorry for the 'svn' style - we are in a process of migration from SVN to GIT (including our CI Jenkins environment). What do we need is to be able to make Jenkins to checkout (or should I say clone?) the GIT project (repository?) into a specific directory. We've tried some refspecs magic but it wasn't to obvious to understand and to use successfully. Furthermore, if in the same Jenkins project we need to checkout several private GitHub repositories into several separate dirs under a project root. How can we do it please? We have GitHub plugin installed. Hope we've phrased the things right.

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  • Would you use Code Bubbles?

    - by Paulo Santos
    I've read this question mentioning Code Bubbles and I've watched their video presentation. The video is impressive, and does seem a little bit futuristic, but apparently it's somewhat real. But that kept me thinking... Would a developer really use such tool? We, as developers, are used to deal with code files, organizing them in directories, in one way or another, some common IDE (for those language that has them). It would be a great leap to use something like Code Bubbles, as they propose. I, personally, am not sure if I could work in such environment... although I think I would just need some adjusting... but I really don't see my mind working out the kinks of it. What are your thoughts on this?

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