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  • Base form controls not visible in child form

    - by Kildareflare
    Hello I'm using C#.Net and have a base form that is inherited by several forms. Until yesterday, when the child (derived) form was opened in the designer the base forms controls would be displayed and shown as locked. Now, however the form is simply blank. None of the base forms controls are visible in the designer. Everything compiles, builds and runs OK. Has anyone else seen this? I've tried placing a call to the base forms InitializeComponent method in the derived forms OnLoad method but to no avail.

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  • If there is a necessary data base

    - by Dmitry
    Hello! I have a desktop program which uses an embedded data base mechanism. For the first time a user will execute a program, it must create a database. So that, next time there is a data base and there is no need to create it. Please, tell me, how to chech if there is a necessary data base.

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  • How to convert from base-256 to base-N, where N is higher than 16?

    - by mark
    Dear ladies and sirs. I need to convert an array of bytes to another base, namely 85. In math terms the question is how to convert from base-256 to base-85 in the most efficient way? This question is inspired by my previous question - http://stackoverflow.com/questions/2827627/what-is-the-most-efficient-way-to-encode-an-arbitrary-guid-into-readable-ascii-3 Thanks.

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  • How to implement fluent interface with a base class, in C++

    - by Vincenzo
    How can I implement this fluent interface in C++: class Base { public: Base& add(int x) { return *this; } } class Derived : public Base { public: Derived& minus(int x) { return *this; } } Derived d; d.add(1).minus(2).add(3).minus(4); Current code doesn't work since Base class doesn't know anything about Derived class, etc. I would be very thankful for a hint/suggestion.

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  • static_cast from Derived* to void* to Base*

    - by Roberto
    I would like to cast a pointer to a member of a derived class to void* and from there to a pointer of the base class, like in the example below: #include <iostream> class Base { public: void function1(){std::cout<<"1"<<std::endl;} virtual void function2()=0; }; class Derived : public Base { public: virtual void function2(){std::cout<<"2"<<std::endl;} }; int main() { Derived d; void ptr* = static_cast<void*>(&d); Base* baseptr=static_cast<Base*>(ptr); baseptr->function1(); baseptr->function2(); } This compiles and gives the desired result (prints 1 and 2 respectively), but is it guaranteed to work? The description of static_cast I found here: http://en.cppreference.com/w/cpp/language/static_cast only mentions conversion to void* and back to a pointer to the same class (point 10).

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  • How to learn programming language (syntax rules, etc.) and remember easily? [closed]

    - by user239522
    I'm new to programming, and I always have a so call difficulty, that is, I always tend to forget the thing (syntax, rules, name, definition or anyting) of a programming language I've learnt. And I personally do feel that the way I learn it is wrong. Here is my method. Everyday I will spend approximately 1 or 2 hours on a programming e-book. I just follow the syllabus and teaching inside the books, of course I have try to code myself, alter the code inside the book, and did the exercises available. But everytime right after I finish a chapter and advanced myself to third or fourth chapter, I will forgot something I learnt in the first chapter. Is it the method I use wrong? Does learning through reading and coding not enough? Do I need to everytime make a small note (mind map for example) of things I've learnt by hand writing? Or do I sometime need to try coding using a pencil and a book, but not a computer?

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  • "Parallel Programming Talk" show

    Over at the Intel Software Network Aaron Tersteeg runs a "Parallel Programming Talk" audio show on which I was invited as a guest (for the 55th episode) to talk about Microsoft's parallelism offerings in Visual Studio 2010. The call started at 7:45AM, so if my voice sounds croaky to you, now you know why ;)Check out the 20-minute chat (and related hyperlinks) on Aaron's blog. Comments about this post welcome at the original blog.

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  • How to keep up to date with Programming Blogs Aggregators

    - by landal79
    Last week I read a great post of Jeff Atwood Keeping Up and "Just In Time" Learning that speaks about how to keep update. The blog post reports Kathy Sierra list, the first item 'Find the best aggregators' has captured my attention. I'm used to look at DZone, IMHO a good aggregator. DZone has voting and tagging. Or recently I discovered Java Code Geeks. Are there any other good programming blog post aggregator?

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  • How to Organize a Programming Language Club

    - by Ben Griswold
    I previously noted that we started a language club at work.  You know, I searched around but I couldn’t find a copy of the How to Organize a Programming Language Club Handbook. Maybe it’s sold out?  Yes, Stack Overflow has quite a bit of information on how to learn and teach new languages and there’s also a good number of online tutorials which provide language introductions but I was interested in group learning.  After   two months of meetings, I present to you the Unofficial How to Organize a Programming Language Club Handbook.  1. Gauge interest. Start by surveying prospects. “Excuse me, smart-developer-whom-I-work-with-and-I-think-might-be-interested-in-learning-a-new-coding-language-with-me. Are you interested in learning a new language with me?” If you’re lucky, you work with a bunch of really smart folks who aren’t shy about teaching/learning in a group setting and you’ll have a collective interest in no time.  Simply suggesting the idea is the only effort required.  If you don’t work in this type of environment, maybe you should consider a new place of employment.  2. Make it official. Send out a “Welcome to the Club” email: There’s been talk of folks itching to learn new languages – Python, Scala, F# and Haskell to name a few.  Rather than taking on new languages alone, let’s learn in the open.  That’s right.  Let’s start a languages club.  We’ll have everything a real club needs – secret handshake, goofy motto and a high-and-mighty sense that we’re better than everybody else. T-shirts?  Hell YES!  Anyway, I’ve thrown this idea around the office and no one has laughed at me yet so please consider this your very official invitation to be in THE club. [Insert your ideas about how the club might be run, solicit feedback and suggestions, ask what other folks would like to get out the club, comment about club hazing practices and talk up the T-shirts even more. Finally, call out the languages you are interested in learning and ask the group for their list.] 3.  Send out invitations to the first meeting.  Don’t skimp!  Hallmark greeting cards for everyone.  Personalized.  Hearts over the I’s and everything.  Oh, and be sure to include the list of suggested languages with vote count.  Here the list of languages we are interested in: Python 5 Ruby 4 Objective-C 3 F# 2 Haskell 2 Scala 2 Ada 1 Boo 1 C# 1 Clojure 1 Erlang 1 Go 1 Pi 1 Prolog 1 Qt 1 4.  At the first meeting, there must be cake.  Lots of cake. And you should tackle some very important questions: Which language should we start with?  You can immediately go with the top vote getter or you could do as we did and designate each person to provide a high-level review of each of the proposed languages over the next two weeks.  After all presentations are completed, vote on the language. Our high-level review consisted of answers to a series of questions. Decide how often and where the group will meet.  We, for example, meet for a brown bag lunch every Wednesday.  Decide how you’re going to learn.  We determined that the best way to learn is to just dive in and write code.  After choosing our first language (Python), we talked about building an application, or performing coding katas, but we ultimately choose to complete a series of Project Euler problems.  We kept it simple – each member works out the same two problems each week in preparation of a code review the following Wednesday. 5.  Code, Review, Learn.  Prior to the weekly meeting, everyone uploads their solutions to our internal wiki.  Each Project Euler problem has a dedicated page.  In the meeting, we use a really fancy HD projector to show off each member’s solution.  It is very important to use an HD projector.  Again, don’t skimp!  Each code author speaks to their solution, everyone else comments, applauds, points fingers and laughs, etc.  As much as I’ve learned from solving the problems on my own, I’ve learned at least twice as much at the group code review.  6.  Rinse. Lather. Repeat.  We’ve hosted the language club for 7 weeks now.  The first meeting just set the stage.  The next two meetings provided a review of the languages followed by a first language selection.  The remaining meetings focused on Python and Project Euler problems.  Today we took a vote as to whether or not we’re ready to switch to another language and/or another problem set.  Pretty much everyone wants to stay the course for a few more weeks at least.  Until then, we’ll continue to code the next two solutions, review and learn. Again, we’ve been having a good time with the programming language club.  I’m glad it got off the ground.  What do you think?  Would you be interested in a language club?  Any suggestions on what we might do better?

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  • Going Parallel with the Task Parallel Library and PLINQ

    With more and more computers using a multi-core processor, the free lunch of increased clock speeds and the inherent performance gains are over. Software developers must instead make sure their applications take use of all the cores available in an efficient manner. New features in .NET 4.0 mean that managed code developers too can join the party.

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  • Scheduled tasks fail to start unless I'm logged in to the server

    - by Chuck
    Tasks need to open a CMD window and pass net use commands, then do a DIR command, pipping the output to a file on the server. Log in as either me (Sysadmin) or with one of the system accounts and task will only run if I'm physically logged into the server. Run as batch file is set in security properties for both users (me and service account), security is granted to all directories, etc. It almost acts like a scheduled task, since it is not physically connected to a display can't create a CMD window and pass the WinID so the command can be sent. I'm guessing. Anyone know of a document that explains how the server handles initiation of a window if done via scheduled task and no attached user is associated with the task? If I log onto the box and run the scheduled tasks they run fine, but produce no errors or event log entries and then just show that it ran successfully and sets the next run time. Have tried both with the run if logged in checkbox on and off and makes no difference. Other tasks work fine, except that they are acting on local drives with no display writing or updating taking place, so I'm guessing the system either can't instantiate a window if no display is connected to a logged on user, or it can't establish a point if it is trying to create a virtual screen. You'd think it is just creating a memory map and then mapping it to a device to display, but that doesn't seem to be the case, but I can find no documentation on how the system handles a scheduled task and how to invoke a fake or virtual screen that it could write to so it appears that a user was connected. Thanks This is driving me nuts and I've tried everything I can think of as well as our network boys ideas and nothing seems to work.

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  • Google I/O 2011: JavaScript Programming in the Large with Closure Tools

    Google I/O 2011: JavaScript Programming in the Large with Closure Tools Michael Bolin Most developers who have tinkered with JavaScript could not imagine writing 1000 lines of code in such a language, let alone 100000. Yet that is exactly what Google engineers have done using a suite of JavaScript tools named "Closure" to produce many of the most popular and sophisticated applications on the Web, such as Gmail and Google Maps. From: GoogleDevelopers Views: 4915 35 ratings Time: 57:07 More in Science & Technology

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  • Scheduled task to map a network drive runs, but doesn't map the drive

    - by bikefixxer
    I have a task set up to run whenever the computer is logged onto that deletes all network folders and maps a network drive. Here is what is in the batch file: @echo off net use * /delete /y net use b: \\Server\Share /user:DOMAIN\Username password exit When the computer is restarted or logged off and back on, the task runs fine (according to the scheduled tasks window saying when it ran last) but the mapped drive doesn't show up. I'll open the command prompt and type "net use" and it simply says "There are no entries in the list". If I then right click on the task and run it, it works and the mapped drive shows up. I've checked the log and nothing shows up. I've tried adding a timer in the batch file so it waits 10 seconds (ping 1.1.1.1 -n 1 -w 10000nul) thinking that maybe the network wasn't connected, but that didn't work. What else can I try? Thanks!

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  • Introducing Visual WebGui's XAML programming model extension for web developers

    - by Visual WebGui
    While ASP.NET provides an event base approach it is completely dismissed when working with AJAX and the richness of the server is lost and replaced with JavaScript programming and couple with a very high security risk. Visual WebGui reinstates the power of the server to AJAX development and provides a statefull yet scalable, server centric architecture that provides the benefits and user productivity of AJAX with the security and developer productivity we had before AJAX stormed into our lives. When...(read more)

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  • Google I/O 2011: Kick-Ass Game Programming with Google Web Toolkit

    Google I/O 2011: Kick-Ass Game Programming with Google Web Toolkit Ray Cromwell, Philip Rogers GWT does more than make awesome Enterprise Apps, it's a great tool for games too. Learn to write 2D and 3D games using HTML5 and GWT, leverage and port existing game libraries and physics engines, share game code between GWT and Android, publish to the Chrome Web Store, and of course, see demos of really neat GWT games in action. From: GoogleDevelopers Views: 14283 176 ratings Time: 44:59 More in Science & Technology

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  • looking for a good programming problem solving tool

    - by ctilley79
    Years ago when I was in school my computer science department used a website that had many different problem solving questions typically used in computer programming. They were ordered in difficulty and you were presented the solution after you attempted the problem. The site was used in competitions and was very useful for training purposes. Since I am trying to brush up on my algorithm skills, a good tool like this would be very useful. Does anyone know of a site similar to this in "modern" times?

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  • Best social networking places for programmers.

    - by Chevex
    I love the programming industry a lot, but I don't have many colleagues that aren't introverted and/or anti-social, or self-centered. What are some good places online to find programming friends that I could share my adventures with? I love stack overflow and related sites but they are more technical and don't really allow you to put up a personal project just for people to see and critique. Any suggestions? A good forum would be great! The only ones I can find are usually full of inexperienced people who just "want" to be a programmer. I'm looking more for a place who's members are already programmers discussing programming topics.

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  • Are there any empirical studies on the effect of different languages on software quality?

    - by jgre
    The proponents of functional programming languages assert that functional programming makes it easier to reason about code. Those in favor of statically typed languages say that their compilers catch enough errors to make up for the additional complexity of type systems. But everything I read on these topics is based on rational argument, not on empirical data. Are there any empirical studies on what effects the different categories of programming languages have on defect rates or other quality metrics? (The answers to this question seem to indicate that there are no such studies, at least not for the dynamic vs. static debate)

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  • Banner Ad Development: What programming should be required?

    - by FXquincy
    Banner Ad Development Career questions are potentially off-topic, but I've come across job postings wanting Banner Ad Developers. I'm not sure if they're development, design, or a niche particular to actionscript designers. First, What programming knowledge is required for Banner Ads (IDE, languages, Frameworks etc)? Second, is this a niche for designers or developers? How differently do designers and developers see their skills in JavaScript?

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