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  • OpenGl ES Eraser Tool

    - by Erika
    Hi Everyone, I am trying to implement an OpenGL eraser tool. I am struggling with this. I was thinking of painting somehow over the previous changes to "clear" out the changes. I can't use the background color because it is not a pattern, not one solid color. Can you point me to the right direction on how to implement an eraser tool ? This is for the iPhone OS but that shouldn't matter. Thanks

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  • WPF Binding a textbox to a property of all items in a generic list

    - by muku
    Hello guys, What I want to do is simple. I have a generic list of objects. Let's say the object class contains a property named Height. What I want to do is bind a textbox's text in the UI with this list and when i change the value in the textbox then all objects in the list update their height value. I am new in WPF, I have studied the MVVM pattern, I can do simple data binding but i can't figure out how to do this :'( Thanks!

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  • Is currying just a way to avoid inheritance?

    - by Alex Mcp
    So my understanding of currying (based on SO questions) is that it lets you partially set parameters of a function and return a "truncated" function as a result. If you have a big hairy function takes 10 parameters and looks like function (location, type, gender, jumpShot%, SSN, vegetarian, salary) { //weird stuff } and you want a "subset" function that will let you deal with presets for all but the jumpShot%, shouldn't you just break out a class that inherits from the original function? I suppose what I'm looking for is a use case for this pattern. Thanks!

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  • Locking down RAD Studio internal browser security.

    - by HMcG
    I use Firefox as my web browser, mostly for access to add-ins such as Flashblock and No-script. I noticed yesterday that the RAD Studio internal browser used for the Welcome Page etc has scripting and Active X etc enabled. Is there a way to disable scripting, or better still, block all access to non-local sources in the built-in browser?

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  • iPhone UISearchBar animated to top

    - by hurley scott
    There are lots of apps where the searchbar moves upwards if active and moves down when it is inactive. There is a sample code from apple available which works with IB, but how can I achieve this behavior programmatically? Mostly it is combined with a navigationbar which moves out of the screen in replace with the searchbar

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  • UIViewController rotate methods

    - by Corey Floyd
    What object is responsible for dipatching the UIViewController rotation method calls, i.e: – shouldAutorotateToInterfaceOrientation: – willRotateToInterfaceOrientation:duration: – willAnimateFirstHalfOfRotationToInterfaceOrientation:duration: – willAnimateSecondHalfOfRotationFromInterfaceOrientation:duration: – didRotateFromInterfaceOrientation: I imagine it is UIApplication (but maybe the AppDelegate or UIWindow). The next question, is how does the object know which UIViewController to talk to? How does it know which UIViewController has its view as the subview of the window? Is there a message you can send or a property you can set (of some object) that sets the "Active" UIViewController for the app?

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  • Java Connections netstat -ano

    - by ikurtz
    I am new to java and I have been testing my application all day long. I just did netstat -ano and it gave me a huge listing of active connections (listening, established) does this mean when i close my appliation these connections are not being shutdown (close())? here is a screenshot: any advise on how to go about closing the connection when im done with it? i am trying to close the connection best to my knowledge but it appears im not doing enough. thanks for your time.

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  • Recycle a project name?

    - by deamon
    I want to start an open source project, but my favourite project name was already used for a framework with the same goal. This project was never popular, had only two active days with commits at Google Code and is dead since four years. In other words: the project is irrelevant but the name is in use at Google Code and ohloh (the same dead project). The .org domain would be available. Would it be ok to reuse this project name?

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  • Spring, Jersey and Viewable JSP Integration

    - by Brian D.
    I'm trying to integrate Spring 3.0.5 with Jersey 1.4. I seem to have everything working, but whenever I try and return a Viewable that points to a JSP, I get a 404 error. When I wasn't using spring I could use this filter: <filter> <filter-name>Jersey Filter</filter-name> <filter-class>com.sun.jersey.spi.container.servlet.ServletContainer</filter-class> <init-param> <param-name>com.sun.jersey.config.feature.Redirect</param-name> <param-value>true</param-value> </init-param> <init-param> <param-name>com.sun.jersey.config.property.packages</param-name> <param-value>cheetah.frontend.controllers</param-value> </init-param> <init-param> <param-name>com.sun.jersey.config.feature.FilterForwardOn404</param-name> <param-value>true</param-value> </init-param> <init-param> <param-name>com.sun.jersey.config.property.WebPageContentRegex</param-name> <param-value>/(images|css|jsp)/.*</param-value> </init-param> </filter> And I could return a Viewable to any JSP's, image, css that were stored in the appropriate folder. However, now that I have to use the SpringServlet to get spring integration, I'm at a loss for how to access resources, since I can't use the filter above. I've tried using this servlet mapping with no luck: <servlet> <servlet-name>jerseyspring</servlet-name> <servlet-class>com.sun.jersey.spi.spring.container.servlet.SpringServlet</servlet-class> <load-on-startup>1</load-on-startup> <init-param> <param-name>com.sun.jersey.config.property.WebPageContentRegex</param-name> <param-value>/(images|css|jsp)/.*</param-value> </init-param> </servlet> <servlet-mapping> <servlet-name>jerseyspring</servlet-name> <url-pattern>/*</url-pattern> </servlet-mapping> Does anyone know the proper configurations to achieve this? Thanks for any help.

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  • using jquery as an alternative to css nth child

    - by JCHASE11
    Hi. I am using the following css to create list items with a chckerboard background ( every other list item has a grey background, which shift every row to create a checkerboard pattern: li:nth-child(8n+2), li:nth-child(8n+4), li:nth-child(8n+5), li:nth-child(8n+7) { background-color:grey; } Is there way I can do this using jquery that is more supportive than css3? Thanks

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  • What is a 'thunk'?

    - by fbrereto
    I've seen it used in programming (specifically in the C++ domain) and have no idea what it is. Presumably it is a design pattern, but I could be wrong. Can anyone give a good example of a thunk?

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  • Help - Three20 Distribution Build

    - by Lukas
    Hey there, I just wanted to build my App for submitting it to the AppStore - it includes the widely used three20 framework. As the Debug Versions on the Dev-Devices worked great, i'm having trouble compiling the project for distribution. XCode says: No architectures to compile for (ONLY_ACTIVE_ARCH=YES, active arch=armv6, VALID_ARCHS=i386). Any idea what's happening there? I've tried to google it, but i haven't found a solution yet. Thanks!

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  • Is instanceof considered bad practice? If so, under what circumstances is instanceof still preferabl

    - by aioobe
    Over the years, I've tried to avoid instanceof whenever possible. Using polymorphism or the visitor pattern where applicable. I suppose it simply eases maintenance in some situations... Are there any other drawbacks that one should be aware of? I do however see it here and there in the Java libraries so I suppose it has its place? Under what circumstances is it preferable? Is it ever unavoidable?

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  • Ajax & session ids

    - by JavaRocky
    How would you go about knowing that ajax requests are related? Normally with HTTP-HTML requests, cookies would store a md5 hash representing a session id. Is there a similar pattern with AJAX?

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  • Installing jdk without sudo?

    - by Legend
    Currently, I have a machine on which I am working in Eclipse, it says that the JRE System Library version is sun-jdk-1.5.0.11 but on my active development machine, it is java-6-sun-1.6.0.16. What is the difference between these two (of course, besides the versioning)? Is there any way I can make the first machine to use the same "java-6-sun-1.6.0.16" version without having sudo permissions on the machine?

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  • Checking jQuery AJAX Request Status

    - by mTuran
    Hi, i do 2 different ajax request via jQuery and i have to check the other one is active or not. How can i do that ? one of example from my ajax requests: active_project_categories_ajax = $.ajax( { url: "/ajax/get_skill_list", dataType: 'json', ...... }); i need something like that: active_project_categories_ajax.status()

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  • Writing a Servlet that checks to see if JSP's exist and forwards to another JSP if they aren't

    - by Omar Kooheji
    I've beeb tasked with writing a servlet that intercepts a call to and JSP in a specific directoy, check that the file exists and if it does just forwarding to that file, if if doesn't I'm to forward to a default JSP. I've setup the web.xml as follows: <servlet> <description>This is the description of my J2EE component</description> <display-name>This is the display name of my J2EE component</display-name> <servlet-name>CustomJSPListener</servlet-name> <servlet-class> ... CustomJSPListener</servlet-class> <load-on-startup>1</load-on-startup> </servlet> ... <servlet-mapping> <servlet-name>CustomJSPListener</servlet-name> <url-pattern>/custom/*</url-pattern> </servlet-mapping> And the doGet method of the servlet is as follows: public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { logger.debug(String.format("Intercepted a request for an item in the custom directory [%s]",request.getRequestURL().toString())); String requestUri = request.getRequestURI(); // Check that the file name contains a text string if (requestUri.toLowerCase(Locale.UK).contains("someText")){ logger.debug(String.format("We are interested in this file [%s]",requestUri)); File file = new File(requestUri); boolean fileExists = file.exists(); logger.debug(String.format("Checking to see if file [%s] exists [%s].",requestUri,fileExists)); // if the file exists just forward it to the file if (fileExists){ getServletConfig().getServletContext().getRequestDispatcher( requestUri).forward(request,response); } else { // Otherwise redirect to default.jsp getServletConfig().getServletContext().getRequestDispatcher( "/custom/default.jsp").forward(request,response); } } else { // We aren't responsible for checking this file exists just pass it on to the requeseted jsp getServletConfig().getServletContext().getRequestDispatcher( requestUri).forward(request,response); } } This seems to result in an error 500 from tomcat, I think this is because the servlet is redirecting to the same folder which is then being intercepted again by the servlet, resulting in an infinite loop. Is there a better way to do this? I'm lead to believe that I could use filters to do this, but I don't know very much about them.

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  • Is it normal for a programmer with 2 years experience to take a long time to code simple programs?

    - by ajax81
    Hi all, I'm a relatively new programmer (18 months on the scene), and I'm finally getting to the point where I'm comfortable accepting projects and developing solutions under minimal supervision. Unfortunately, this also means that I've become acutely aware of my performance shortfalls, the most prevalent of which is the amount of time it takes me to develop, test, and submit algorithms for review. A great example of what I'm talking about occurred this week when I was tasked with developing a simple XML web service (asp.net 3.5) callable via client-side JavaScript, that accepts a single parameter and returns a dataset output to a modal window (please note this is the first time I've had to develop a web service and have had ZERO experience creating/consuming them...let alone calling them from JS client side). Keeping a long story short -- I worked on it for 4 days straight, all day each day, for a grand total of 36 hours, not including the time I spent dwelling on the problem in the shower, the morning commute, and laying awake in bed at night. I learned a great deal about web services and xml/json/javascript...but was called in for a management review to discuss the length of time it took me to develop the solution. In the meeting, I was praised for the quality of my work and was in fact told that my effort was commendable. However, they (senior leads and pm's) weren't impressed with the amount of time it took me to develop the solution and expressed that they would have liked to see the solution in roughly 1/3 of the time it took me. I guess what concerns me the most is that I've identified this pattern as common for myself. Between online videos, book research, and trial/error coding...if its something I haven't seen before, I can spend up to two weeks on a problem that seems to only take the pros in the videos moments to code up. And of course, knowing that management isn't happy with this pattern has shaken me up a bit. To sum up, I have some very specific questions I'd like to ask, and would greatly appreciate your objective professional feedback. Is my experience as a junior programmer common among new developers? Or is it possible that I'm just not cut out for the work? If you suspect that my experience is not common and that there may be an aptitude issue, do you have any suggestions/solutions that I could propose to management to help bring me up to speed? Do seasoned, professional programmers ever encounter knowledge barriers that considerably delay deliverables? When you started out in the industry, did you know how to "do it all"? If not, how long did it take you to be perceived as "proficient"? Was it a natural progression of trial and error, or was there a particular zen moment when you knew you had achieved super saiyen power level? Anyways, thanks for taking the time to read my question(s). I don't know if this is the right place to ask for professional career guidance, but I greatly appreciate your willingness to help me out. Cheers, Daniel

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  • Google Maps v3 - Adding makers results in duplicate markers

    - by Richard
    Hi guys, I'm having some problems with Google Maps v3. I have an event listener on "bounds_change" that adds all accommodations(markers) within the active bounds. When i move the map slightly, the same markers are added again because they are located in the bounds. So every time I move the map, duplicate markers are added. How can I make sure these markers stay unique? Thanks!! Richard

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  • Performance implications of BeginInvoke

    - by AngryHacker
    I've inherited code where BeginInvoke is called from the main thread (not a background thread, which is usually the pattern). I am trying to understand what it actually does in this scenario. Does the method being called in the BeginInvoke get in line of messages that come down to the window? The docs say asynchronously, so that is my assumption. How does the framework prioritize when to kick off the method called by BeginInvoke?

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