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  • how to add lines numbers to : QTextEdit ?

    - by radi
    i am writing a visual basic ide , and i need to add lines numbers to QTextEdit and highlight current line . i have found this tutorial but it is written in java and i write my project in c++ so where to find tutorial like that in c++ , or if there is a ready to use component ? thanks .

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  • Any Alternatives to NCommon?

    - by Innogetics
    I like the way NCommon saves me from dealing with all the plumbing required to do DDD with NHibernate. I like it so much that it I am seriously considering it to be part of my default architecture in new projects. I'd like to ask if there are other DDD alternatives (aside from coding from scratch) to what NCommon does. Thanks.

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  • What is "null pointer assignment error"?

    - by sharptooth
    One of job interview questions on C pointer here is the following: what is null pointer assignment error? I've googled for a while and don't see any reasonable explanation. What is that? Trying to write through a null pointer? Something architecture- or environment-specific? What exactly is that error?

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  • C: performance of assignments, binary operations, et cetera...

    - by Shinka
    I've heard many things about performance in C; casting is slow compared to normal assignments, functional call is slow, binary operation are much faster than normal operations, et cetera... I'm sure some of those things are specific to the architecture, and compiler optimization might make a huge difference, but I would like to see a chart to get a general idea what I should do and what I should avoid to write high-performance programs. Is there such a chart (or a website, a book, anything) ?

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  • Best printing tools, components for windows.forms applications.

    - by mkus
    Hi, I have started to research for a printing component in our windows.forms based project. I want to benefit from your experiences. There are some popular reporting tools in .net world such as crystal report, active reports, xtrareports etc. Could you say advantages and disadvantages of these tools or other tools you suggest?

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  • Smarty: including a template file from the same directory

    - by Robert Munteanu
    I have a Smarty template located in a directory under templates_dir: templates/some/dir/template.tpl . In the same directory, I have a sub-template: templates/some/dir/_component.tpl . I can't include the sub-component using an unqualified include, since apparently it looks it up under the templates_dir: {include file='_component.tpl'} How can I tell Smarty to read the file from the same directory, as opposed to the templates root ? I do not want to specify absolute paths, since it will cause problems when changing directory structures.

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  • deep or shallow copying?

    - by Dervin Thunk
    Dear all. I was wondering if there are examples of situations where you would purposefully pass an argument by value (deep copy) in C. For instance, passing a char to a function is usually cheaper in space than passing a char* (if there's no need to share the value), since char is 1 byte and pointers are, well, whatever they are in the architecture (4 in my 32 bit machine). ?(When) do you want to pass (big) deep copies to functions? if so, why?

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  • vnc application for iPhone. How to go about building one?

    - by John Stewart
    Alright.. I am on a mission to learn iPhone development as much as possible. At my current job they have requested me if I can build a vnc viewer in iPhone.. there are many vnc apps but i want to learn how to build an app like that.. what would be the architecture of this app how should i organize my app? Any thoughts? comments?

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  • When is it okay to reference WindowsBase.dll?

    - by Tyler
    I've heard/read about people not wanting to reference the assembly because of the Windows component (e.g. "I don't want to reference Windows for my Web App). I'd like to hear what a large community feels about this. For which project types (business, data access, etc.) is it considered acceptable to reference WindowsBase.dll.

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  • What can cause System.Move to occasionaly give wrong results?

    - by Fredrik Loftheim
    The last few days we have had some strange problems with our database components developed by a third party. There has been no changes to these components for months. The code that HAS changed the last few days is our own code and we have also updated our gui-components developed by another third party. After debugging I have found that a call to System.Move in one of the database component procedures occationaly gives wrong results! Please take a look at the code below from the database components and read my comments. How can this inconsistent behaviour happen? Can anyone give me an idea of how to procede to find the cause of this inconsistent behaviour? NB! I dont think there is anything wrong with THIS code, it is only shown to explain the problem "symptoms". My guess is that there is some sort of memory corruption or something, caused by our code or the updated gui-component-code. Edit: Take a look at the blogpost linked below. It seems that it could be related to my problem. At least as I read it it confirms that System.Move can give wrong results: http://blog.excastle.com/2007/08/28/delphi-bug-of-the-day-fpu-stack-leak/ Procedure InternalDescribe; var cbufl: sb4; //sb4=LongInt cbuf: array[0..30] of char; cbufp: PChar; //.... begin //..Some code repeat //...Some code to initialize cbufp and cbufl //On the 15. iteration the values immediately Before Move are always these: //cbufp = 'STDPRODUCTSTOREDELEMENTSCOUNT' //cbuf = ('S', 'T', 'A', 'T', 'U', 'S', #0, 'E', 'V', 'A', 'R', 'R', 'E', 'C', 'I', 'D', #0, 'D', 'U', 'C', 'T', 'I', 'D', #0, #0, #0, #0, #0, #0, #0, #0) //cbufl = 29 Move(cbufp^, cbuf, cbufl); //Values immediately After Move should then be: //cbuf = ('S', 'T', 'D', 'P', 'R', 'O', 'D', 'U', 'C', 'T', 'S', 'T', 'O', 'R', 'E', 'D', 'E', 'L', 'E', 'M', 'E', 'N', 'T', 'S', 'C', 'O', 'U', 'N', 'T', #0, #0) //But sometimes this Move results in this value( 1 in 5..15 times): //cbuf = ('S', 'T', 'D', 'P', 'R', 'O', 'D', 'U', 'C', 'T', 'S', 'T', 'O', 'R', 'E', 'D', #0, #0, #0, #0, #0, 'N', 'T', 'S', 'C', 'O', 'U', 'N', 'T', #0, #0) } until SomeCondition; //...Some more code end;

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  • Amazon S3 components for Delphi 2010

    - by Mick
    Besides the Amazon Integrator from /n software, are there any other Amazon S3 components available that can be used with Delphi 2010? I would use the one from /n software, but it has some issues (e.g. GetObjectInfo doesn't work if the object is stored in a specific location) and limitations (e.g. copying objects doesn't let you define replacement meta-data). I don't have the time or resources to create such a component myself. Thanks!

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  • converting webpage into jpeg image using java

    - by ravi
    I am building a web application, in Java, where i want the whole screenshot of the webpage, if i give the URL of the webpage as input. The basic idea i have is to capture the display buffer of the rendering component..I have no idea of how to do it.. plz help..

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  • Should I worry about running out of HierarchyIDs?

    - by Bruno Martinez
    When you ask for a new HierarchyID between two others, the result gets progressively longer. For example, between 2/5.6 and 2/5.7 there's only 2/5.6.1 and other 4 component paths. The HierarchyID data type is limited to 800 some bytes, so you can't repeat this forever. Then again, integer types are also limited, but it isn't a problem in practice. Should I periodically defragment my table so that height doesn't grow unbounded?

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  • Sending SMS using Java ME application

    - by iamrohitbanga
    I want to a Java ME application that transfers any SMS received to a PC using bluetooth. The PC can then direct the Java ME application via bluetooth to send a response SMS. Is there library available for this architecture or I have to design it myself? Is this approach correct or a better one exists? I want to use bluetooth as then I will not have dependency on the cable.

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  • wsFederationHttpBinding over net.tcp

    - by CodeChef
    I have services that use net.tcp bindings (both streaming and buffered endpoints.) I'd like to add WIF federated security to those services, while continuing to use net.tcp bindings. I've tried to create custom bindings, but so far have been unsuccessful. Below is the general architecture that I'm attempting. I'm looking for the correct binding configuration to make this work. Client - WPF Application Relying party - WCF Service with net.tcp endpoints STS - WCF Service with http(s) endpoint

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  • Introduction to Subversion for Developers

    - by wandiscoGeorge
    The second course in the series, "Introduction to Subversion for Developers" will take place on Wednesday, May 5, 2010 at 9AM PDT. Subversion's architecture and design principles will be covered and attendees will be introduced to using Subversion for software development. http://wandisco.com/webinar/subversion/training/intro_for_devs

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  • Visual Studio Default Open File Action

    - by Kleinux
    I am using Visual Studio 2008 with C#. Is there a way to set the default editor for a class file containing a DataTable derived class? Whenever I double click on one of these classes to open the file VS attempts to open a component designer. Since my class isn't compatible with that editor this is a rather useless default. I would like these files to open up in the normal code editor.

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  • Example of moving from MySQL to NoSQL?

    - by OverTheRainbow
    Hello, For a Facebook-like site, ie. which is write-intensive and delivers user-customized pages, I'd like to build a prototype to investigate whether the document-centric NoSQL architecture would be a good alternative to sharding and reduce the load on the single master (+ multiple slaves) that we currently use and is the bottleneck. Does someone know of a good article that would give actual, simple examples of going from a relational layout in MySQL to a NoSQL layout? Thank you.

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