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  • code to edit the text in an EditText widgit

    - by user293663
    Hello, I am a newbi programmer and am having trouble with a measurement conversion program I am working on. What I would like to do is have several EditText boxes. When one is filled in and a calculate button is hit then the rest will be populated with a converted number. The part I am getting stuck on is outputting the answers to EditText widgets. ex: There are three EditText Widgets. a user inputs the number 6 into the first one (labeled inches) and presses calculate. I would like the next box to display .5 (labeled feet) and the last to display .1666 (this would be yards) .setText() apparently does not work to modify the text in an EditText any help would be greatly appreciated.

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  • C# can't cast bool to int

    - by Svetlozar Angelov
    We all know that in C# we can't cast bool to int. I wanted to see what is the binary representation of true with bitmask, but I can't use (bool & int).. I think the problem is the architecture desicion "true is true, not any number != 0" (C++) and I was wondering what the benefits of such an architecture are? What is so bad with the C true/false concept?

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  • How can I learn the math necessary for working with computer vision?

    - by Duncan Benoit
    I know that computer vision involves a lot of math, but I need some tips about how programmers gain that knowledge. I've started to use the OpenCV library but I have some major problems in understanding how the math works in the algorithms. In college I have studied some math and we worked with matrices and derivatives, but I didn't pay to much attention to the subject. It seemed to be so difficult and useless from a programmer point of view. I suppose that there has to be some easy way to understand what a second derivative is without calculating an equation. (Derivatives are just an example) Do you have any tips for me about how can i gain such knowledge? A forum, book, link, advice, anything?

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  • How do I determine which C/C++ compiler to use?

    - by Adam Siddhi
    Greetings, I am trying to figure out which C/C++ compiler to use. I found this list of C/C++ compilers at Wikipedia: http://en.wikipedia.org/wiki/List_of_compilers#C.2FC.2B.2B_compilers I am fairly certain that I want to go with an open source compiler. I feel that if it is open source then it will be a more complete compiler since many programmer perspectives are used to make it better. Please tell me if you disagree. I should mention that I plan on learning C/C++ mainly to program 2D/3D game applications that will be compatible with Windows, Linux, MAC and iPhone operating systems. I am currently using Windows Vista x64 OS. Thanks, Adam

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  • Need some guidelines on iPad animation programming

    - by thomasvsundert
    Hi, I'm creating an interactive e-book for the iPad. This book will contain multiple pages that will consist of a lot of animations (frame and motion animations), transitions,... I was wondering what my development options are, should I use OpenGL, Quartz,...? I've use UIImageView.animationImages before and found that it had really bad performance. What's the best way to draw frame based animations? Does anybody have some good pointers to resources on this? thanks in advance, Thomas

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  • How to open a .a file

    - by Mgst
    Heya! My name is Ale, and this is the first time that I post in this website. I've a little problem: I have to open a linker file, that have ".a" extension. I use Dev-C++, I don't know if it would be useful for you :-P I hope you will answer soon! Oh, and excuse me for my bad English, tell me if I made some mistakes! Thanks!!

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  • C# .net framework- border on only one side of the form

    - by user161179
    I am an inexperienced programmer , completely new to programming for windows . I am writing a little program that I always wanted . Its being written using C# using .net framework. atleast thats what I think I am doing. All the talk about framework and .nets , windows forms , and win32 api has all got me really confused.. :( anyways I have simple Form object. Form f = new Form() ; f.Text = "" ; f.ControlBox =false ; Now How to remove the all the borders on the form except one sides? As in, the side borders should go , but the top border should stay FormBorderStyle doesn't have anything for this Also how do you people solve such problems yourself , without asking ? look at others code ? read a a book ? any particular website ? I have googled , but it didn't turn up nothing.

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  • Is it really wrong to version documents using CouchDB's default behaviour?

    - by Tomas Sedovic
    This is one of those "I know I shouldn't do this but it's oh so convenient." questions. Sorry about that. I plan to use CouchDB for storing a bunch of documents and keeping their entire revision history. CouchDB does the versioning automatically, but it is strongly discouraged for programmer's use: "You cannot rely on document revisions for any other purpose than concurrency control." From what I've found on the CouchDB wiki, the versions can get deleted either during compaction or during replication. As far as I can tell, Compaction must always be triggered manually and Replication occurs only when there's more than one database server. The question is: if I won't run compaction and will use only single database instance for my documents, can I just use CouchDB's document versioning and expect it to work? What other problems I might run into? E.g. does not running compaction hurt the performance or consume significantly more disk space (than if I did handle the versioning manually)?

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  • What Level of Education Is Most Useful?

    - by Steve Rowe
    If you were going to hire a programmer to work for/with you, what level of CS education would you prefer them to have and why? This assumes all other things are equal which, of course, they never are in real life. Self taught? Bachelor's? Masters? PHD? The important part of the answer is why, not the level. I'm looking for how important people think a Computer Science education really is and if one can go too far. A little clarification: To make things a little more even, assume you're hiring them without a lot of work experience. Obviously having a higher education is of less value the farther you are from graduation.

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  • custom string format 0,0 with slash or back slash

    - by Mamad R
    i have a WPF TextBox that user can type number in that . now i am searching for a string format that can separate TextBox number each 3 point (like 0,0) but i want separate text with Slash or Back Slash or another character. and we do not know how much point our number has. i am searching for string format not Linq solution or etc . i read Microsoft help but cant find any way . sample = 123456789 == 123/456/789 (good) --- 123,456,789 (bad)

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  • Closure Library with ASP.NET

    - by jarrett
    Google's Closure Library looks like it has a lot of great features, but I'm not seeing any examples of it used with ASP.NET sites. I'm just wondering if anyone has any experience using the two together and what parts. Is is a good or bad experience?

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  • How does memory management in Java and C# differ?

    - by David Johnstone
    I was reading through 2010 CWE/SANS Top 25 Most Dangerous Programming Errors and one of the entries is for Buffer Copy without Checking Size of Input. It suggests using a language with features to prevent or mitigate this problem, and says: For example, many languages that perform their own memory management, such as Java and Perl, are not subject to buffer overflows. Other languages, such as Ada and C#, typically provide overflow protection, but the protection can be disabled by the programmer. I was not aware that Java and C# differed in any meaningful way with regard to memory management. How is it that Java is not subject to buffer overflows, while C# only protects against overflows? And how is it possible to disable this protection in C#?

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  • Is it wrong to get feedback from Stack Overflow on a live system architecture?

    - by hal10001
    I am the technical director at a startup, and I will eventually be tasked with implementing a "real" system architecture when we hire more programmers. Right now our clients are small enough, and it is just me, so documented deployments, source control, unit tests and quality assurance servers are non-existent. Eventually I will need to devise a work-flow and architecture patterns for the majority of the work we will do (e-commerce). If I posted an architecture diagram, and asked for feedback, would that be a misuse of the Stack Overflow system? I don't want to get into that battle of "hey, don't ask us to do your job for you", but the reality is that any programmer who eventually moves into this realm will have to figure it out with feedback from other developers. HighScalability.com is what comes to mind when I think about this sorta thing in terms of the knowledge I need. So if this is not the right kind of forum for that, then any book recommendations or white papers you can recommend would be appreciated.

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  • Best way to save user settings on client-side (javascript,jquery)

    - by Johua
    I have a settings page that a user can enter some text and save directly to a combobox. Next time when page loads, combobox is filled in with the previous entered text. Also i have a modify button, so the user can delete or edit a value from the combobox. My question is, what's the best way to save to user settings on the client with javascirpt/jquery? I can only think of using an array and then (push/pop).,,Anyone got some bad experience with arrrays? thx

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  • SVN syncing fails with ZendStudio

    - by rashcroft
    Hi. When I try to sync with my SVN (I'm using unfuddle) through ZendStudio I get the following error: Some of selected resources were not committed. svn: Commit failed (details follow): svn: MKACTIVITY request failed on '/svn/test1234_a/!svn/act/58ae0e6d-2301-0010-8300-cb465553b788' svn: MKACTIVITY of '/svn/test1234_a/!svn/act/58ae0e6d-2301-0010-8300-cb465553b788': 400 Bad Request (http://test1234.unfuddle.com) I think this is some type of proxy error, but how can I fix this (using ZendStudio). Thanks.

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  • JS and Rails site wide announcements

    - by pcasa
    Tried doing http://davidwparker.com/2008/09/17/site-wide-announcements-in-rails-using-jquery-jgrowl/ Am really bad with JS. Think I am messing up on the last part where it says "This code goes in your application.js file (somewhere in $(function){ //here })" Am I not suppose to do a link_to_function and create a function with this code that references that link? Really lost on this one.

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  • Active C++ project to contribute to

    - by Joseph Pond
    I am a self-taught c++/java programmer (I will be starting uni in August though!). I have worked on one project in which I was part of an active team. I really felt I learnt the most and gained a lot of experience while working with the team. Unfortunately it was a small closed source project which has recently taken a slumber. I'm looking for some active open source c++ projects which I could contribute to (preferably that are mainly developed on the linux platform). The other project I worked on was a video game, however, I would like to contribute to a project which has a functional purpose (other than to amuse). Any suggestions on possible projects?

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  • Essential Programming Tools

    - by Mat
    We all have different needs due to the platform and/or stack we work with, and simple programmer preference is famous for starting religious wars. However, in each area there is usually a set of tools that get recommended over and over, even though people might individually prefer one member over the others. Unix text mode code editors, for example, is an extremely contentious issue but no one can deny that most people will choose either vi or emacs. So, without criticising the alternatives, recommend me developement tools. Text editors for different platforms, version control systems, bug trackers, database engines, templating systems... whatever! What do you enjoy using every day? I'll edit together the answers as a list of highly recommended tools in each area. Please don't start discussing which is the best ;)

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  • Is undefined behavior worth it?

    - by Space_C0wb0y
    Many bad things happened and continue to happen (or not, who knows, anything can happen) due to undefined behavior. I understand that this was introduced to leave some wiggle-room for compilers to optimize, and maybe also to make C++ easier to port to different platforms and architectures. However the problems caused by undefined behavior seem to be too large to be justified by these arguments. What are other arguments for undefined behavior? If there are none, why does undefined behavior still exist?

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  • DotNetZip trouble with russian encoding

    - by Xaver
    i use DotNetZip in my project. using (var zip = new ZipFile()) { zip.ProvisionalAlternateEncoding = System.Text.Encoding.GetEncoding(866); zip.AddFile(filename, "directory\\in\\archive"); zip.Save("archive.zip"); } all ok but when i use method AddDirectoryByName i have a bad directory names.

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