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• Integrating GWT, Spring and JPA (Eclipse-link) in Weblogic 10

  - by MVK

  Hi, My application architecture looks like this. GWT in the UI layer - Calls GWT RPC service (servlets) - Looksup Spring Beans - Calls the DAO layer which is implemented in JPA (EclipseLink). I have successfully tested the application with GWT rpc services directly calling the JPA layer. But I am having trouble integrating spring into the mix. (Primary usage of Spring is transaction management). I tried googling, but could not find any good article on the topic. (Most of the articles refers to using Spring MVC within GWT, which is not what I am looking for) Could you please point me to some article/tutorial? Thanks in advance! Manoj

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• StackOverflow Site Layout Problem in Chrome

  - by Laramie

  I was cleaning up one of my questions here and noticed that Stack Overflow's comments were overflowing into the right column in Chrome. The question is, what's the difference in CSS handling between Chrome and Firefox. I don't have access to Safari, Opera, et al. Can someone tell me in which browsers the error manifests? Is it just me? Here's the layout error: (my apologies to Tim Down for covering up his name with my comment bubble) Since I have no natural skill for good layouts and the whole process makes me sad, I wonder if someone can diagnose the error on StackOverflow and make a recommendation on how to avoid it. Is this a consequence of embedding a div inside a td? Plus I admit it. It's fun to point out an error on one of the greatest sites ever.

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• Render only the segment/area of a circle that intersects the main circle

  - by Greenhouse Gases

  I absolutely love maths (or 'math' as most of you would say!) but I haven't done it to a level where I know the answer to this problem. I have a main circle which could have a centre point at any x and y on a display. Other circles will move around the display at will but at any given call to a render method I want to render not only those circles that intersect the main circle, but also only render the segment of that circle that is visible inside the main circle. An analogy would be a shadow cast on a real life object, and I only want to draw the part of that object that is 'illuminated'. I want to do this preferably in Java, but if you have a raw formula that would be appreciated. I wonder how one might draw the shape and fill it in Java, I'm sure there must be some variation on a polyline with arcs or something? Many thanks

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• English dictionary as txt or xml file with support of synonyms

  - by Simon

  Can someone point me to where I can download English dictionary as a txt or xml file. I am building a simple app for myself and looking for something what I could start using immediately without learning complex API. Support for synonyms would be great, that is it should be easier to retrieve all the synonyms for particular word. It would be absolutely fantastic if dictionary would be listing British and American spelling of the words where they are differ. Even if it would be small dictionary (few 000's words) that's ok, I only need it for small project. I even would be willing to buy one if the price is reasonable, and dictionary is easy to use - simple xml wold be great. Any directions please.

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• Microsoft Robotics Studio in Ubuntu, with Wine ?

  - by Arkapravo

  I am using Ubuntu 9.10 and I am a bit of a robotics enthusiast. I have used KiKS (in MATLAB for simulating Khepera robots), MobotSim (in Windows, simulates a point like robot using a BASIC editor) and Player/Stage (with C/C++ on Ubuntu 9.04). My question, can MS Robotics Studio be installed in Ubuntu Linux using Wine (I am using 1.1.31) ? Has anyone done it ? Any other way to install MS Robotics Studio in Unix (Any flavour) ? Thanks for your reply !

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• How to use Zend Cache with SimpleXML objects?

  - by Jeremy Hicks

  I'm trying to cache the user timeline of a Twitter feed using Zend_Service_Twitter which returns its results as a SimpleXML object. Unfortunately the regular serialize functions (which Zend Cache uses) don't play nice with SimpleXMl objects. I found this http://www.mail-archive.com/[email protected]/msg18133.html. So it looks like I'll need to create some kind of custom frontend for Zend Cache to be able to change the serialize function used. Anybody ever done this already or can point me where to look to start?

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• Finding the closest grid coordinate to the mouse onclick with javascript/jQuery

  - by Acorn

  What I'm trying to do is make a grid of invisible coordinates on the page equally spaced. I then want a <div> to be placed at whatever grid coordinate is closest to the pointer when onclick is triggered. Here's the rough idea: I have the tracking of the mouse coordinates and the placing of the <div> worked out fine. What I'm stuck with is how to approach the problem of the grid of coordinates. First of all, should I have all my coordinates in an array which I then compare my onclick coordinate to? Or seeing as my grid coordinates follow a rule, could I do something like finding out which coordinate that is a multiple of whatever my spacing is is closest to the onclick coordinate? And then, where do I start with working out which grid point coordinate is closest? What's the best way of going about it? Thanks!

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• Extend TTPhotoViewController with custom TTPhotoView

  - by ggould75

  I have successfully integrated the three20 framework in my project, and I have extended the TTPhotoViewController to add some further functionality. Now I need to add some subviews to the TTPhotoView loaded by the TTPhotoViewController. In particular I would like to add that subviews after every TTPhotoView as been loaded. These subviews represents sensible area over the image so they should scale proportionally with the image. The user can tap a subview to get extra info about the image. I don't know how to implement this behavior. Should I extend the TTPhotoView and make sure that the TTPhotoViewController use this extended version instead of its TTPhotoView? Could someone point me to the right direction? Thank you

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• How to transfer SQLite db to web server on android phone

  - by Shane

  Hi, I have an application that creates an SQLite database and saves information to it over the course of a day. At the end of the day i want to export this database to a web server. Could anyone point me in the right direction for this? Should I use httppost or put. I have researched this myself online but there seems to be so many different ways to explore. The server side does not exist yet either. I have access to an apache server so i am hoping to use that. Could anyone advise me the best/most simple way to do this? Thanks

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• Ok to use VirtualProtect to change resource in Delphi?

  - by user257188

  I'm working on a simple localization effort in D2010. I'm handling all strings on forms because ETM seems like overkill for my needs, as did other 3rd party tools... (although I'm not so sure at this point!) Is the code below for changing the Const.pas strings considered safe to change the button labels on standard message boxes? procedure HookResourceString(rs: PResStringRec; newStr: PChar); var oldprotect: DWORD; begin VirtualProtect(rs, SizeOf(rs^), PAGE_EXECUTE_READWRITE, @oldProtect); rs^.Identifier := Integer(newStr); VirtualProtect(rs, SizeOf(rs^), oldProtect, @oldProtect); end; const NewOK: PChar = 'New Ok'; NewCancel: PChar = 'New Cancel'; Procedure TForm.FormCreate; begin HookResourceString(@SMsgDlgOK, NewOK); HookResourceString(@SMsgDlgCancel, NewCancel); end;

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• Raudus vs ExtPascal

  - by user193655

  Delphi developers has several tools (several alternatives to ASP.NET) for building web applications. While No.1 framework is Intraweb, there is a lot of interest around ExtJS, that has 2 incarnations: 1) the opensource ExtPascal 2) the closedsource Raudus Now the products are different, Raudus never supports the latest ExtJS version (while ExtPascal does because as far as I read it "almost automatically updates itself to the latest ExJS version"), Raudus "seems" much RAD (much similar to Intraweb from the RAD point of view). Anyway why chose one or the other? Why Raudus since it is free cannot become Open Source?

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• "Cannot convert to IComparer"

  - by Odrade

  I have the following IComparer defined for boxed RegistryItem objects: public class BoxedRegistryItemComparer : IComparer<object> { public int Compare(object left, object right) { RegistryItem leftReg = (RegistryItem)left; RegistryItem rightReg = (RegistryItem)right; return string.Compare(leftReg.Name, rightReg.Name); } } I want to use this to sort an ArrayList of boxed RegistryItems (It really should be a List<RegistryItem, but that's out of my control). ArrayList regItems = new ArrayList(); // fill up the list ... BoxedRegistryItemComparer comparer = new BoxedRegistryItemComparer(); ArrayList.sort(comparer); However, the last line gives the compiler error: "Cannot convert from BoxedRegistryItemComparer to System.Collections.IComparer". I would appreciate it if someone could point out my mistake.

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• Recommendations for 'C' Project architecture guidelines?

  - by SiegeX

  Now that I got my head wrapped around the 'C' language to a point where I feel proficient enough to write clean code, I'd like to focus my attention on project architecture guidelines. I'm looking for a good resource that coves the following topics: How to create an interface that promotes code maintainability and is extensible for future upgrades. Library creation guidelines. Example, when should I consider using static vs dynamic libraries. How to properly design an ABI to cope with either one. Header files: what to partition out and when. Examples on when to use 1:1 vs 1:many .h to .c Anything you feel I missed but is important when attempting to architect a new C project. Ideally, I'd like to see some example projects ranging from small to large and see how the architecture changes depending on project size, function or customer. What resource(s) would you recommend for such topics?

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• How to change *.ico for button in running mode?

  - by karikari

  I am currently doing visual c++ for an Internet Explorer toolbar button. I have a registration script file (*.rgs) that defines or maybe register the features of my button inside the Windows registry. My objective is, I want my button to change its *.ico image, based on certain conditions process from my *.cpp file. My problem is, I don't understand, how can I somehow change the *.ico file for my button in real time, during my application is running? For example, IF f = 1, ico_file = green.ico; ELSE ico_file = red.ico; Any idea, that you guys can point to me, how can I change the *.ico file for my Internet Explorer toolbar button while the IE is running.

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• CakePHP and jQuery - Unobtrusive actions

  - by fortysixandtwo

  I'm trying to make an unobtrusive action for deleting bookmarks in CakePHP. Allthough it's working just fine, I suspect there must be a better way to do this. Could someone please point me in the right direction? function delete($id = null) { $ok = $this->Bookmark->delete($id); if($this->RequestHandler->isAjax()) { $this->autoRender = false; $this->autoLayout = false; $response = array('status' => 0, 'message' => 'Could not delete bookmark'); if($ok) { $response = array('status' => 1, 'message' => 'Bookmark deleted'); } $this->header('Content-Type: application/json'); echo json_encode($response); exit(); } // Request isn't AJAX, redirect. $this->redirect(array('action' => 'index')); }

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• JSF, actionlistener at facelets

  - by asrijaal

  Hi there, I'm using JSF (Mojarra 1.2) with Richfaces (3.3.2) within some facelets which are used as portlets (I'm using the Jboss Portlet Bridge 2.0 here). Now I'm facing something strange: I've got an actionlistener on my <h:commandButton> which is triggered, when the button is clicked but when I simply reload the page, the action is executed everytime I load the page again. This happens only if I already triggered the action before. Is this behaviour normal? I should notice that Spring 2.5 is used to manage my beans, the mentioned beans are session-scope beans, maybe this is a interessting point?!

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• How do you get Eclipse/Mylyn to fill out your commit messages for you?

  - by Sam Hasler

  I've setup the following: Installed Mylyn in Eclipse Installed the Bugzilla connector Installed Subversive SVN Integration for the Mylyn Project I've gone to Windows - Preferences - Tasks - Team and clicked Change Set Management and left it with the default Commit Comment Template: ${task.status} - ${connector.task.prefix} ${task.key}: ${task.description} ${task.url} However, if I activate a bugzilla bug in the Task List, and then edit a file, when I commit the changes the commit message isn't filled in. Also, in the Synchronisation perspective there isn't a change set for the task I'm working on. I've tried following the instructions on the Eclipse wiki's Mylyn FAQ for Why does task change set not appear when I modify files? but the bullet point: * Verify that the configured Synchronize View is configured for change sets. points to a section that is no longer in the document. I have a Show Change Sets button, but clicking it only shows me incoming change sets, there aren't any outgoing change sets. What am I missing?

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• C++ double division by 0.0 versus DBL_MIN

  - by wonsungi

  When finding the inverse square root of a double, is it better to clamp invalid non-positive inputs at 0.0 or MIN_DBL? (In my example below double b may end up being negative due to floating point rounding errors and because the laws of physics are slightly slightly fudged in the game.) Both division by 0.0 and MIN_DBL produce the same outcome in the game because 1/0.0 and 1/DBL_MIN are effectively infinity. My intuition says MIN_DBL is the better choice, but would there be any case for using 0.0? Like perhaps sqrt(0.0), 1/0.0 and multiplication by 1.#INF000000000000 execute faster because they are special cases. double b = 1 - v.length_squared()/(c*c); #ifdef CLAMP_BY_0 if (b < 0.0) b = 0.0; #endif #ifdef CLAMP_BY_DBL_MIN if (b <= 0.0) b = DBL_MIN; #endif double lorentz_factor = 1/sqrt(b); double division in MSVC: 1/0.0 = 1.#INF000000000000 1/DBL_MIN = 4.4942328371557898e+307

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• Linking IronPython to WPF

  - by DonnyD

  I just installed VS2010 and the great new IronPython Tools extension. Currently this extension doesn't yet generate event handlers in code upon double-clicking wpf visual controls. Is there anyone that can provide or point me to an example as to how to code wpf event handlers manually in python. I've had no luck finding any and I am new to visual studio. Upon generating a new ipython wpf project the auto-generated code is: import clr clr.AddReference('PresentationFramework') from System.Windows.Markup import XamlReader from System.Windows import Application from System.IO import FileStream, FileMode app = Application() app.Run(XamlReader.Load(FileStream('WpfApplication7.xaml', FileMode.Open))) and the XAML is: <Window xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="WpfApplication7" Height="300" Width="300"> <Button>Click Me</Button> </Window> Any help would be appreciated.

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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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• jQuery Sortable + Droppable z-index problem

  - by unknowndomain

  I am having a probelm with the z-index of my sortable object not being above my droppable. If you visit http://clareshilland.unknowndomain.co.uk/. Press Ctrl + L to bring up the login screen. Enter the username clare and the password shilland. It will then load in the admin bar and if you click manage gallery. A pop down thumbnail view will appear with all the photos from that gallery. The issue is that when you drag the 'polaroids' from the grid to the delete area they are under the delete area. I tried putting the delete area inside the same div as the grid but it makes no difference, I just don't know what to do at this point so any help would be a massive help!

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• innovation for technical high school

  - by gnuze

  I work in a high school in Italy. Our goal is forming computer programmers in 5 years. Nowaday, we teach vb.net on Win ( desktop applications using ADO on Access ), C on linux ( process, threads ) , C++ on Linux ( sockets TCP/UDP with UML ), and a bit of ASP.net, flash programming, PHP, Joomla and PIC Microcontrollers. We are looking for something innovative to add in our programs of study, but every teacher have a different point of view: we are debating about python, C#, Arduino, Silverlight and smartphones programming. Any suggestions? Tx in advance.

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• Why don't stacks grow upwards (for security)?

  - by AshleysBrain

  This is related to the question 'Why do stacks typically grow downwards?', but more from a security point of view. I'm generally referring to x86. It strikes me as odd that the stack would grow downwards, when buffers are usually written to upwards in memory. For example a typical C++ string has its end at a higher memory address than the beginning. This means that if there's a buffer overflow you're overwriting further up the call stack, which I understand is a security risk, since it opens the possibility of changing return addresses and local variable contents. If the stack grew upwards in memory, wouldn't buffer overflows simply run in to dead memory? Would this improve security? If so, why hasn't it been done? What about x64, do those stacks grow upwards and if not why not?

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• ASP.NET CustomValidator trying to match to System.EventHandler?

  - by annakata

  I have markup so: <asp:TextBox runat="server" ID="Accountname" /> <asp:CustomValidator runat="server" ControlToValidate="Accountname" OnServerValidate="Accountname_CheckUnique" meta:resourcekey="ACCOUNTNAME_UNAVAILABLE" /> Codebehind so: protected void Accountname_CheckUnique(object source, ServerValidateEventArgs arguments) { arguments.IsValid = Foo(); } Which was working just fine, and then without changing anything on the page ASP now insists: No overload for 'Accountname_CheckUnique' matches delegate 'System.EventHandler' Well no, and nor should it according to MSDN. It's late and I'm tired, anybody know how to fix this or point out the glaring flaw in my comprehension?

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• replace all link href's with return of a function, with regex

  - by Rajat Singhal

  I have a function which returns a modified url, if passed a url.. I need to call this function on hrefs of all the links in my html data.. I can't use DomDocument, it's in php cli, I need regex solution.. I have tried preg_replace, and preg_replace_callback, but I simply don't understand the whole concept of using $1, $2 in the replacement string..If somebody can point to a good documentation,that'll be great too.. function modifyUrl($old_url) { ...... return $new_url; } $html = "...";//Long html content having links //need to call modifyUrl for all link's hrefs..

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