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  • For what purpose I can use c++ to increase my skills?

    - by user824981
    I want to learn new things. Initially I was a PHP programmer. Then I thought it was not enough. Then I started learning Java thing. It took me 3 months to learn. Java, J2EE, Spring, Hibernte, Spring Security, Spring Roo and many design patterns MVC and stuff like AOP, DI . I never knew that before but I got the idea what J2EE. After 3 months, I just made a simple page with Registration form integrated with Spring Security. I wanted to make one complete project in it but that was too much for me and I didn't want spend more time on it as then i need to host that as well so I left that. Then I started learning Python and made few sys admin scripts and then Django and now I am finishing a complete web app in Python. Now I want to learn C++, but before that I need to find out what i can do with it. Just like I know Python is very useful because I have my own servers so I can write scripting and websites so Python is good for me. But I am confused in which areas C++ can help me. I don't want to end up like I have with Java where either I have big projects or nothing for day to day use.

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  • Overlay section of my screen to another section with transparency and also can be clicked through [closed]

    - by steakbbq
    I am looking to make a program that accomplishes some simple goals. I need to be able to specify an area of my screen to have reproduced in a window. Similar to who the windows magnifier works. I also need it to stay on top. I also need it to be transparent. I also need it to be ghost like(mouse clicks go through it) so the application below can be interacted with still. Here is what I am trying to do. What would be the best way to go about it? http://i.imgur.com/0ahi7.jpg

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  • What language and tools can I use to create a simple game with child-lock (capture all key press) for Windows? [closed]

    - by scw
    I'm writing an open source program that changes colors & plays sounds when keys are pressed. I want it to run in full screen mode and have a child-lock so kids can't exit accidentally. I want it to capture all keys including ctrl alt delete. (So it's partially a game, but partially windows utility.) My target OS is Windows 7 (32 & 64 bit), keeping Windows 8 in mind. My options: Visual Studio using .net C# Windows Forms - the devil I know. But not a "game" platform, which is why I'm asking this question. Visual Studio & XNA - have never used XNA, not sure of capabilities or support future Python - What flavor, what modules, what IDE? I've never done anything with Python but I found a couple of similar open source projects in python. Something else that I don't know about? Any input is appreciated.

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  • ?????????OutOfMemory?????????????????|WebLogic Channel|??????

    - by ???02
    WebLogic Server Enterprise Edition????????????JRockit Mission Control????????????????????????????????????????????????????????????????????????????????Application Grid???????? ????????????????? ???(?????? Fusion Middleware?????? ???????????)??????????????????JRockit Mission Control?????2?????(???)????????????OutOfMemory????????　Java????????????????????1????????????????????????OutOfMemory?????????????·??????JVM????????????????????????????????????????????????B?????OutOfMemory????????????　B????????????????·?????????????????????????WebLogic Server???????????????OutOfMemory???????????????????????????????????????????????????????????????????????????????????????????????????????　????B???????????????JRockit Mission Control?1??????Memory Leak Detector?????OutOfMemory???????????????Memory Leak Detector?Java????????????·???????????????????????????????????????????????????????????????????????????????????????????????????????　Memory Leak Detector?????????????????????????????????????(byte[])???????????????????????????????????·??????(GC)????????????????????????????????　????????????????????????????????????????????????Memory Leak Detector????·??????????·??????????????????????????????????????????????????????????????ThreadLocal??????????????????????????40%??????????????????java.lang.ThreadLocal?????????　WebLogic Server???Java EE????????·????????????????/??????????????????????????????????????·???????????????????????·????ThreadLocal?????????????·???????????????????????·?????????????????ThreadLocal???????????????????????????ThreadLocal??????????????????????????????　???????ThreadLocal?????????????????Memory Leak Detector?????????????????????·?????????????????????????????(ThreadLocal???????????????)???????·????????????????????????????????????????????????????????????1????????????1?????·????????????????????????????????????????????·????????????????　??B???????WebLogic Server???????????????????????????????WebLogic Server????2???????????????????????????????????????????????????????????????????1?????????????2?????·?????????????2?????????·???????????　???ThreadLocal???????????????ThreadLocal????????????????Thread??????????????????????????????????????Thread???????????????????GC?????????????????GC????????????????????????·?????????????????????????????????????????????·?????????????????????????????(????????·???·???·????)?　WebLogic Server???????????????????????????????????????????????(?????????????????)???"????"?????????????????????????????GC??????????ThreadLocal???????????????????????????????????????GC?????????????????????????????????????????????????????????????????????????????????OutOfMemory?????????????????　??????????????????JRockit Flight Recorder?JRockit Mission Control????????????????????????????????????ThreadLocal????????????????????????????·???·????????????????????????????JRockit Flight Recorder/JRockit Mission Control????????WebLogic Server?????????????????????????????????·????????????????　????????????????????????????·???????????C??????????WebLogic Server??????????????????????????????????????????????4??(1????×4??)??????12??(2????×6??)???????????　??????????3?????????????????????????????????????????????????4??·???????3,500??????????????12??????????2,000???????????????????　???C??????????JVM????·????GC?????????????????????????OS???????????·??????????????????????????????????????????????　???????????????????????JRockit Flight Recorder?????????????????????????????????????·?????????????????30??????????????????????　???????????????????1?????????????????????(??????·?????)?????????????????????WebLogic Server??????????????????????????????????????????·?????????????????????　???????????????????????????????????????????????????????Spin(???)??????????????????·???????????????????????????????????????????????????????????·???????????????JRockit Flight Recorder??????????????????12??????????????·??????????????????(4??/1 JVM)????Java???·????????????(12??/1 JVM)????Java???·????????　??????·?????????CPU????????????????????????????·???????????????????????????????CPU??????????????????????????????????????????????????????·?????????????????????????????·????　?????????·??????????????????·????????????????????????????????????????????????????????????·??????????????????????????????????·?????????????????????·?????????????????(?????????????·???????????????????)?　WebLogic Server?JVM???Oracle JRockit???CPU???????JVM?????????????JVM?????????????????????????????????????????????????(JVM????-XX:BindToCPUs???????????CPU?????????JVM???-XX:NumaMemoryPolicy=strictlocal???????????????·?????????)??????????·???????????????????????????????(12??/1 JVM)????Java???·????????(?????)*　　　*　　　*　??????????3?????????????????????????????????????????????????WebLogic Server????OS?????????????????????????????????JRockit Flight Recorder??????????????JRockit Mission Control???????????????????????????????????????????WebLogic Server?????????????????????????????????????JRockit Flight Recorder /JRockit Mission Control??????????????????????????????????????????????????????????????????????????????????????

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  • Why does Windows 7 always automatically change the input or keyboard language?

    - by B-Ball
    I am wondering why Windows 7 always automatically changes my input or keyboard language. I've a notebook with an integrated QWERTY keyboard English (United States). Traveling, I use that one but, additionally, I've my own as well as a much better keyboard at home which is a QWERTZ keyboard German (Germany). Thus, being at home, I'd like to use my QWERTZ keyboard. Unfortunately, Windows 7 does not play along at this one. Every time, I start up my notebook, it is usually set to English (United States) but that's not the problem. In case, I'd use my notebook QWERTY keyboard English (United States), that's fine. However, if I start up my notebook and I'd like to use my QWERTZ keyboard German (Germany), I usually press ALT + Left Shift in order to switch from English (United States) to German (Germany) and Windows 7 switches the input language but only for the program that is currently open. If my input language is set to German (Germany) and I, e.g., open NotePad, Windows 7 automatically switches my input language to English (United States). This is very annoying since I've to change the input or keyboard language to German (Germany) every time I open up a new program. Why doesn't Windows 7 stay with one input language if I changed it manually by pressing ALT + Left Shift? Why doesn't the manual change of the input or keyboard language apply for the whole Windows 7? Why does it only affect the currently opened program? Since I've two keyboards with two different layouts, I seriously need to have both of the keyboards languages installed. I tried both of the below settings in order to find a solution for my problem. Currently, I am using the first option, two input languages. First option: Two input language - www.abload.de/img/19aie.jpg Second option: Two keyboard languages - www.abload.de/img/2nb4x.jpg Thank you very much in advance.

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  • SQL Server -> 'SQL_Latin1_General_CP1_CI_AS' Collation -> Varchar Column -> Languages Supported

    - by Ajay Singh
    All, We are using SQL Server 2008 with Collation Setting as 'SQL_Latin1_General_CP1_CI_AS'. We are using Varchar column to store textual data. We know that we cannot store Double Byte data in Varchar column and hence cannot support languages like Japanese and Chinese without converting it to NVarchar. However, will it be safe to say that all Single Byte Characters can be stored in Varchar column without any problem? If yes then from where can I get the list of languages which needs Single Byte for storage and the list of languages which needs double byte? Any assistance in this regard is highly appreciated. Thanks in advance.

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  • Which programming languages aren't considered high-level?

    - by hilo
    In informatics theory I hear and read about high-level and low-level languages all time. Yet I don't understand why this is still relevant as there aren't any (relevant) low-level languages except assembler in use today. So you get: Low-level Assembler Definitely not low-level C BASIC FORTRAN COBOL ... High-level C++ Ruby Python PHP ... And if assembler is low-level, how could you put for example C into the same list. I mean: C is extremely high-level compared to assembler. Same even for COBOL, Fortran, etc. So why does everybody keep mentioning high and low-level languages if assembler is really the only low-level language.

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  • For what applications is Forth best suited?

    - by namin
    I am intrigued by stack-based languages like Forth. Are there situations where Forth is the best tool for the job or is it just an intellectual and historical curiosity? What about derivative languages like Factor or Joy? Which of these languages would you recommend learning? And for what purpose (apart from mind expansion)?

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  • Force full garbage collection when memory occupation goes beyond a certain threshold

    - by Silvio Donnini
    I have a server application that, in rare occasions, can allocate large chunks of memory. It's not a memory leak, as these chunks can be claimed back by the garbage collector by executing a full garbage collection. Normal garbage collection frees amounts of memory that are too small: it is not adequate in this context. The garbage collector executes these full GCs when it deems appropriate, namely when the memory footprint of the application nears the allotted maximum specified with -Xmx. That would be ok, if it wasn't for the fact that these problematic memory allocations come in bursts, and can cause OutOfMemoryErrors due to the fact that the jvm is not able to perform a GC quickly enough to free the required memory. If I manually call System.gc() beforehand, I can prevent this situation. Anyway, I'd prefer not having to monitor my jvm's memory allocation myself (or insert memory management into my application's logic); it would be nice if there was a way to run the virtual machine with a memory threshold, over which full GCs would be executed automatically, in order to release very early the memory I'm going to need. Long story short: I need a way (a command line option?) to configure the jvm in order to release early a good amount of memory (i.e. perform a full GC) when memory occupation reaches a certain threshold, I don't care if this slows my application down every once in a while. All I've found till now are ways to modify the size of the generations, but that's not what I need (at least not directly). I'd appreciate your suggestions, Silvio P.S. I'm working on a way to avoid large allocations, but it could require a long time and meanwhile my app needs a little stability

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  • Java Daemon Threading with JNI

    - by gwin003
    I have a Java applet that creates a new non-daemon thread like so: Thread childThread = new Thread(new MyRunnable(_this)); childThread.setDaemon(false); childThread.start(); Then my MyRunnable object calls a native method that is implemented in C++: @Override public void run() { while (true) { if (!ran) { System.out.println("isDaemon: " + Thread.currentThread().isDaemon()); _applet.invokePrintManager(_applet.fFormType, _applet.fFormName, _applet.fPrintImmediately, _applet.fDataSet); ran = true; } } } This C++ method calls into a C# DLL that shows a form. My problem is, whenever the user navigates away from the page with a Java applet on it, JVM (and my C# form) is killed. I need the form and JVM to remain open until it is closed by the user. I tried setting my thread to be a non-daemon thread, which is working because System.out.println("isDaemon: " + Thread.currentThread().isDaemon() prints isDaemon: false. Is there something related to the way that the C# form is created (is there another thread I'm not accounting for) or something I am overlooking?? My thread is not a daemon thread, but the JVM is being killed anyways.

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  • MS Office 2013 and Asian languages

    - by atamur
    I've got a Win7 computer with Office 2013 installed. System language is German. When switching input language to Thai I can type in the system dialog boxes (like start buttno app finder), but can't type in MS Word (pressing the keys on the keyboard does nothing on the screen, the cursor doesn't move). The weirdest thing here is: if I use numeric keypad and type any number after that the keyboard starts working in Word for a few characters. Japanese and Nepal input languages work fine. Does anyone know any way to troubleshoot? Thank you!

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  • How to reliably take Java Heap Dumps?

    - by karlcyr
    My team is running into difficulties when trying to take good heap dumps triggered by OutOfMemoryErrors. For specific reasons we are currently taking the dumps with jmap called from a bash script instead of using the HeapDumpOnOutOfMemoryError flag. We're using a 64-bit 1.6 JVM with a heap size around 3 GB. Our heap dumps fail 90% of the time (guesstimate). Is there anything we can do to improve our odds of getting a clean heap dump we can use to troubleshoot memory problems? I have read that jmap had major issues in Java 1.4 but that those issues should be mostly addressed now.

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  • Creating WCF Services using Dynamic Languages and DLR

    - by Perpetualcoder
    I was curious how anyone would go about creating WCF based services using a dynamic language like IronPython or IronRuby. These languages do not have the concept of interfaces. How would someone define service contracts? Would we need to rely on static languages for such kind of tasks? I am a big fan of Python in particular and would like to know if this can be done at this point.

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  • Better languages than SQL for stored procedures

    - by Ken Paul
    I'm getting increasingly frustrated with the limitations and verbosity required to actually commit some business logic to stored procedures, using languages such as Transact-SQL or PL/SQL. I would love to convert some current databases to Oracle and take advantage of its support for Java stored procedures, but that option is not available at the moment. What alternatives would you recommend in the way of databases that support stored procedures in other languages?

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  • Whitespace-Ingoring languages

    - by Sarc Asm
    People (here on SO) often talk about their dislike of languages which don't ignore whitespace. My question is: Which programming languages ignore whitespace? Examples: C++ co n st my Var with spaces = 1 23; - Error PHP $this willnot work = 456;

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  • Formal Equivalence between programming languages

    - by Ketan
    Hello We have 2 languages which are (informally) semantically equivalent but syntactically different. One is xml and another is script based. How can I go about formally proving that both languages are in fact equivalent. Script approach is just a convenient way to write a same program that would be tedious to write in xml. Thanks Ketan

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  • Website in right-to-left languages (Arabic, Hebrew)

    - by jack
    I currently developing a multi-language interface for a Django project. But when I started to work on Arabic and Hebrew languages, I noticed all pages messed up after dir="rtl" to html tag (according to instructions on http://www.w3.org/International/tutorials/bidi-xhtml/) Does that mean I need separate stylesheets for right-to-left languages?

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  • Prove that the set of regular languages is a proper subset of the set of the context-free languages

    - by David Relihan
    I was brushing up (not homework)on some computation-theory and came accross this problem: How can you prove that the set of regular languages is a proper subset of the set of the context-free languages. Now I know a language is regular iff it is accepted by a finite automaton. And I know a language is context-free iff it is accepted by a pushdown automaton. But I'm not sure of what solution is.

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