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  • Is it bad practice to use the same name for arguments and members?

    - by stijn
    Sometimes I write constructor code like class X { public: X( const int numberOfThingsToDo ) : numberOfThingsToDo( numberOfThingsToDo ) { } private: int numberOfThingsToDo; }; or in C# class X { public X( int numberOfThingsToDo ) { this.numberOfThingsToDo = numberOfThingsToDo; } private int numberOfThingsToDo; } I think the main reason is that when I come up with a suitable member name, I see no reason to use a different one for the argument initializing it, and since I'm also no fan of using underscores the easiest is just to pick the same name. After all it's suitable. Is this considered bad practice however? Any drawbacks (apart from shooting yourself in the foot when forgetting the this in C#)?

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  • Is it bad practice to call a controller action from a view that was rendered by another controller?

    - by marco-fiset
    Let's say I have an OrderController which handles orders. The user adds products to it through the view, and then the final price gets calculated through an AJAX call to a controller action. The price calculation logic is implemented in a seperate class and used in a controller action. What happens is that I have many views from different controllers that need to use that particular action. I'd like to have some kind of a PriceController that I could call an action on. But then the view would have to know about that PriceController and call an action on it. Is it bad practice for a view to call an action on a different controller from which it was rendered?

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  • Is it Considered Good SQL practice to use GUID to link multiple tables to same Id field?

    - by Mallow
    I want to link several tables to a many-to-many(m2m) table. One table would be called location and this table would always be on one side of the m2m table. But I will have a list of several tables for example: Cards Photographs Illustrations Vectors Would using GUID's between these tables to link it to a single column in another table be considered 'Good Practice'? Will Mysql let me to have it automatically cascade updates and delete? If so, would multiple cascades lead to an issues? UPDATE I've read that GUID (a hex number) Generally takes up more space in a database and slows queries down. However I could still generate 'unique' ids by just having the table initial's as part of the id so that the table card's id would be c0001, and then Illustrations be I001. Regardless of this change, the questions still stands.

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  • Images from remote source - is it possible or is it bad practice?

    - by user1620696
    I'm building a management system for websites and I had an idea related to image galleries. I'm not sure it's a good approach. Since image space needed is related to how many images a user might upload, I thought about using cloud services like DropBox, Mega, and Google Drive to store images and load then when needed. The obvious problem with this approach is that downloading the images from the 3rd party service would hamper the user experience due to the increased download times. Is there any way to save images belonging in an image gallery on remote source without hampering the user experience because of speed? Or is this approach really not a good practice?

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  • bad practice to create a print friendly page to remove the use of pdfs?

    - by Phil
    the company I work for has a one page invoice that uses the library tcpdf. they wanted to do some design changes that I found are just incredibly difficult for setting up in .pdf format. using html/css I could easily create the page and have it print very nicely, but I have a feeling that I am over looking something. is it a good practice to set up a page just for printing? and if not, is it at least better than putting out a ugly .pdf? I could also use the CSS inline so that if they wanted to download it and open it they could.

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  • Best practice for comments above methods in a grails application?

    - by Travis
    I'm writing a grails application and am not sure what the best practice is with regard to comments outside of method blocks. I've done a bit of research and there seems to be conflicting views on how and when these sort of comments should be used. In lots of source code I have seen there seems to be comments above every method detailing what that method does. I'm not sure if grails should be differnet? My question is should I have a comment above each method in my controllers, services and domain objects? i.e /* * This method displays the index page */ def index(){ render view : "index" }

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  • Best practice to identify and kill hanging process, when system hangs and reacts slowly on user input?

    - by NES
    Recently when I tried to open a video with VLC, my system slowed down, the open applications webbrowser, VLC and filemanager and others didn't react any longer. The mouse just reacted still very slowly. On a windows machine i would press a keycombi CTRL-ALT-DEL to open the taskmanager, search the process which caused the hang and kill it. Since i'm fairly new with the use of linux i haven't figured out the best practice for solve such a situation in Ubuntu. Which quick and effective way would you recommend to identify the hanging process and close it, when the system already reacts very slowly on user input?

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  • Passing functions into other functions as parameters, bad practice?

    - by BlueHat
    We've been in the process of changing how our AS3 application talks to our back end and we're in the process of implementing a REST system to replace our old one. Sadly the developer who started the work is now on long term sick leave and it's been handed over to me. I've been working with it for the past week or so now and I understand the system, but there's one thing that's been worrying me. There seems to be a lot of passing of functions into functions. For example our class that makes the call to our servers takes in a function that it will then call and pass an object to when the process is complete and errors have been handled etc. It's giving me that "bad feeling" where I feel like it's horrible practice and I can think of some reasons why but I want some confirmation before I propose a re-work to system. I was wondering if anyone had any experience with this possible problem?

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  • Which subjects in (theorethical) computer science matter the most in practice?

    - by Anto
    As you should know, computer science and software engineering aren't the same thing. My question is which subjects in computer science are (in your opinion) most important for software engineers and most applicable in practice? Please don't talk about "niche" areas of computer science (e.g. compiler construction) because of the usage of that inside that niche (e.g. helps you create compilers), but instead about areas which might be applicable and useful in a wide spectrum of software engineering problems and jobs (e.g helps you with parsing structured text).

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  • Is passing the Model around in this way considered bad practice?

    - by Theomax
    If I have a view called, for example, ViewDetails that displays user information in labels and has a Model called ViewDetailsModel and if I want to allow the user to click a button to edit some of these details, is it considered bad practice is I pass the entire Model in the markup to a controller method which then assigns the values for another model, using the values stored in the Model that was passed in as a parameter to that action method? If so, should there instead be a service method that gets the data required for the edit view? For example: In the ViewDetails view, the user clicks the edit button which calls an action method in the controller (and passes in the Model object). The action method then uses the data in the Model object to populate another model which will be used for the EditDetails view that will be returned.

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  • Is it a bad practice to have an interface to define constants?

    - by FabianB
    I am writing a set of junit test classes in java. There are several constants, for example strings that I will need in different test classes. I am thinking about an interface that defines them and every test class would implement it. The benefits I see there are: easy access to constants: "MY_CONSTANT" instead of "ThatClass.MY_CONSTANT" each constant defined only once Is this approach rather a good or bad practice? I feel like abusing the concept of interfaces a little bit. You can answer generally about interfaces/constants, but also about unit tests if there is something special about it.

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  • Images from remote source - is it possible or is really a bad practice?

    - by user1620696
    I'm building a management system for websites and I had an idea related to image galleries that I'm not sure it's a good approach. Since images might need good deals of space depending on how much images a user uploads an so on, I thought on using cloud services like dropbox, mega and google drive to store images and load then when needed. The obvious problem is that for me this seems a useless solution because it would be slow to download the images from the remote source, making the user experience not so good. Is there any way to save images of a image gallery on remote source without getting the user experience bad because of speed? Or this is really not a good practice?

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  • Is it a bad practice to quit a company only to begin as a consultant? [closed]

    - by niwi
    Like the title says; is it a bad practice to quit a company after a few years, only to begin as a consultant for the same 'customer'? I've been lucky enough to come in to a company in the oil business from the beginning, developing software for relatively new and unused technology. Long before I even got this job, I've wanted to start my own consulting firm. Is it morally wrong of me to quit my job after a few years, only to hire myself out as a 'specialist' or consultant on our systems?

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  • Is `catch(...) { throw; }` a bad practice?

    - by ereOn
    While I agree that catching ... without rethrowing is indeed wrong, I however believe that using constructs like this: try { // Stuff } catch (...) { // Some cleanup throw; } Is acceptable in cases where RAII is not applicable. (Please, don't ask... not everybody in my company likes object-oriented programming and RAII is often seen as "useless school stuff"...) My coworkers says that you should always know what exceptions are to be thrown and that you can always use constructs like: try { // Stuff } catch (exception_type1&) { // Some cleanup throw; } catch (exception_type2&) { // Some cleanup throw; } catch (exception_type3&) { // Some cleanup throw; } Is there a well admited good practice regarding these situations?

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  • Is it a good practice to run identd in 2010?

    - by Alex R
    I know in the "old days" it was good practice to shut this off. But nowadays I have heard that it improves deliverability of email. In the old days people were not worried about spam (or having their outbound email rejected), so that made sense. Of course, the question is only relevant to servers that send email. What is the current, common practice among discerning Linux admins? Run identd or leave it off? Thanks

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  • Build problems when adding `__str__` method to Boost Python C++ class

    - by Rickard
    I have started to play around with boost python a bit and ran into a problem. I tried to expose a C++ class to python which posed no problems. But I can't seem to manage to implement the __str__ functionality for the class without getting build errors I don't understand. I'm using boost 1_42 prebuild by boostpro. I build the library using cmake and the vs2010 compiler. I have a very simple setup. The header-file (tutorial.h) looks like the following: #include <iostream> namespace TestBoostPython{ class TestClass { private: double m_x; public: TestClass(double x); double Get_x() const; void Set_x(double x); }; std::ostream &operator<<(std::ostream &ostr, const TestClass &ts); }; and the corresponding cpp-file looks like: #include <boost/python.hpp> #include "tutorial.h" using namespace TestBoostPython; TestClass::TestClass(double x) { m_x = x; } double TestClass::Get_x() const { return m_x; } void TestClass::Set_x(double x) { m_x = x; } std::ostream &operator<<(std::ostream &ostr, TestClass &ts) { ostr << ts.Get_x() << "\n"; return ostr; } BOOST_PYTHON_MODULE(testme) { using namespace boost::python; class_<TestClass>("TestClass", init<double>()) .add_property("x", &TestClass::Get_x, &TestClass::Set_x) .def(str(self)) ; } The CMakeLists.txt looks like the following: CMAKE_MINIMUM_REQUIRED(VERSION 2.8) project (testme) FIND_PACKAGE( Boost REQUIRED ) FIND_PACKAGE( Boost COMPONENTS python REQUIRED ) FIND_PACKAGE( PythonLibs REQUIRED ) set(Boost_USE_STATIC_LIBS OFF) set(Boost_USE_MULTITHREAD ON) INCLUDE_DIRECTORIES(${Boost_INCLUDE_DIRS}) INCLUDE_DIRECTORIES ( ${PYTHON_INCLUDE_PATH} ) add_library(testme SHARED tutorial.cpp) target_link_libraries(testme ${Boost_PYTHON_LIBRARY}) target_link_libraries(testme ${PYTHON_LIBRARY} The build error I get is the following: Compiling... tutorial.cpp C:\Program Files (x86)\boost\boost_1_42\boost/python/def_visitor.hpp(31) : error C2780: 'void boost::python::api::object_operators::visit(ClassT &,const char *,const boost::python::detail::def_helper &) const' : expects 3 arguments - 1 provided with [ U=boost::python::api::object ] C:\Program Files (x86)\boost\boost_1_42\boost/python/object_core.hpp(203) : see declaration of 'boost::python::api::object_operators::visit' with [ U=boost::python::api::object ] C:\Program Files (x86)\boost\boost_1_42\boost/python/def_visitor.hpp(67) : see reference to function template instantiation 'void boost::python::def_visitor_access::visit,classT>(const V &,classT &)' being compiled with [ DerivedVisitor=boost::python::api::object, classT=boost::python::class_, V=boost::python::def_visitor ] C:\Program Files (x86)\boost\boost_1_42\boost/python/class.hpp(225) : see reference to function template instantiation 'void boost::python::def_visitor::visit>(classT &) const' being compiled with [ DerivedVisitor=boost::python::api::object, W=TestBoostPython::TestClass, classT=boost::python::class_ ] .\tutorial.cpp(29) : see reference to function template instantiation 'boost::python::class_ &boost::python::class_::def(const boost::python::def_visitor &)' being compiled with [ W=TestBoostPython::TestClass, U=boost::python::api::object, DerivedVisitor=boost::python::api::object ] Does anyone have any idea on what went wrrong? If I remove the .def(str(self)) part from the wrapper code, everything compiles fine and the class is usable from python. I'd be very greatful for assistance. Thank you, Rickard

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  • MVC 2 with IIS 6 Problems

    - by SlackerCoder
    Hey guys, I'm using IIS 6 on a Windows 2003 Server and I am trying to get an MVC2 project installed on that machine. I am having nightmare-ish problems doing so! I've looked up TONS of references on what to do, and not 1 single one works. (They work for MVC1 projects, as I have a few of those running already using said solutions). Does anyone have any tips/hints/ideas on what needs to be done for MVC2 projects with IIS 6? I am definitely pulling my hair out over this. I have tried it on 2 of my dev servers, and both get the same result. The closest I can get to a served page is an error page "Object reference not set to an instance of an object", however, the page has try/catch blocks that are being ignored, so I dont think its running the code on the controller, I think it's saying that the controller is the error. (For the reference, the error in question is directed at the HomeController.cs file). What I've tried: Wildcard mapping Changing routes to {controller}.mvc Changing routes to {controller}.aspx Adding the .mvc extension to IIS Modifying routes in Global.asax There's a LOT of code in this project so far, so I will only post the first page(s) that should get served: MASTER PAGE: <div class="page"> <div id="header"> <div id="title"> <h1>Meritain RedCard Interface 2.0</h1> </div> <!-- This is the main menu. Each security role will have access to certain buttons. --> <div id="menucontainer"> <% if (Session["UserData"] != null) { %> <% if (/*User Security Checks Out*/) { %> <ul id="menu"> <li><%= Html.ActionLink("Home", "Index", "Home")%></li> <li><%= Html.ActionLink("Selection", "Index", "Select", new { area = "Selector" }, null)%></li> <li><%= Html.ActionLink("Audit", "Index", "Audit", new { area = "Auditor" }, null)%></li> <li><%= Html.ActionLink("Setup", "Index", "Setup", new { area = "Setup" }, null)%></li> <li><%= Html.ActionLink("About", "About", "Home")%></li> </ul> <% } %> <% } %> </div> </div> <div id="main"> <asp:ContentPlaceHolder ID="MainContent" runat="server" /> <div id="footer"> </div> </div> </div> Default.aspx.cs: [I added this file as a potential solution, since it works with MVC 1] protected void Page_Load(object sender, EventArgs e) { string originalPath = Request.Path; HttpContext.Current.RewritePath(Request.ApplicationPath, false); IHttpHandler httpHandler = new MvcHttpHandler(); httpHandler.ProcessRequest(HttpContext.Current); HttpContext.Current.RewritePath(originalPath, false); } HomeController.cs: public ActionResult Index() { loadApplication(); ViewData["Message"] = "Welcome to ASP.NET MVC!"; return View(); } public ActionResult About() { return View(); } private void loadApplication() { Session["UserData"] = CreateUserSecurity(HttpContext.User.Identity.Name.ToString()); } I did not list the CreateUserSecurity method, but all it does it call the DB using the Username and returns the record in the database that matches the username. EDIT: Added code and what I've tried so far (as requested).

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  • Problems occurred when invoking code from plug-in: "org.eclipse.jface"

    - by user1775376
    I've got a new java project at Eclipse from SVN and just tried to open the project in the Eclipce's Project Explorer window and received this error: Problems occurred when invoking code from plug-in: "org.eclipse.jface". I've no idea what's this, can you guys help me? Exception Stack Trace: java.lang.NullPointerException at org.jboss.ide.eclipse.as.classpath.core.ejb3.EJB3ClasspathContainer.getClasspathEntries(EJB3ClasspathContainer.java:115) at org.eclipse.jdt.internal.core.JavaProject.resolveClasspath(JavaProject.java:2695) at org.eclipse.jdt.internal.core.JavaProject.resolveClasspath(JavaProject.java:2853) at org.eclipse.jdt.internal.core.JavaProject.getResolvedClasspath(JavaProject.java:1958) at org.eclipse.jdt.internal.core.PackageFragmentRoot.getRawClasspathEntry(PackageFragmentRoot.java:547) at org.eclipse.jdt.internal.corext.buildpath.ClasspathModifier.isExcluded(ClasspathModifier.java:485) at org.eclipse.jdt.internal.ui.wizards.buildpaths.newsourcepage.IncludeToBuildpathAction.canHandle(IncludeToBuildpathAction.java:170) at org.eclipse.jdt.internal.ui.wizards.buildpaths.newsourcepage.BuildpathModifierAction.selectionChanged(BuildpathModifierAction.java:101) at org.eclipse.jface.viewers.Viewer$2.run(Viewer.java:164) at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42) at org.eclipse.ui.internal.JFaceUtil$1.run(JFaceUtil.java:49) at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:175) at org.eclipse.jface.viewers.Viewer.fireSelectionChanged(Viewer.java:162) at org.eclipse.jface.viewers.StructuredViewer.updateSelection(StructuredViewer.java:2188) at org.eclipse.jface.viewers.StructuredViewer.handleSelect(StructuredViewer.java:1211) at org.eclipse.ui.navigator.CommonViewer.handleSelect(CommonViewer.java:478) at org.eclipse.jface.viewers.StructuredViewer$4.widgetSelected(StructuredViewer.java:1241) at org.eclipse.jface.util.OpenStrategy.fireSelectionEvent(OpenStrategy.java:239) at org.eclipse.jface.util.OpenStrategy.access$4(OpenStrategy.java:233) at org.eclipse.jface.util.OpenStrategy$1.handleEvent(OpenStrategy.java:403) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84) at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4128) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1457) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1480) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1465) at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:1270) at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3974) at org.eclipse.swt.widgets.Display.applicationNextEventMatchingMask(Display.java:4875) at org.eclipse.swt.widgets.Display.applicationProc(Display.java:5226) at org.eclipse.swt.internal.cocoa.OS.objc_msgSendSuper(Native Method) at org.eclipse.swt.widgets.Widget.callSuper(Widget.java:220) at org.eclipse.swt.widgets.Widget.mouseDownSuper(Widget.java:1092) at org.eclipse.swt.widgets.Tree.mouseDownSuper(Tree.java:2052) at org.eclipse.swt.widgets.Widget.mouseDown(Widget.java:1084) at org.eclipse.swt.widgets.Control.mouseDown(Control.java:2528) at org.eclipse.swt.widgets.Tree.mouseDown(Tree.java:2007) at org.eclipse.swt.widgets.Display.windowProc(Display.java:5471) at org.eclipse.swt.internal.cocoa.OS.objc_msgSendSuper(Native Method) at org.eclipse.swt.widgets.Widget.callSuper(Widget.java:220) at org.eclipse.swt.widgets.Widget.windowSendEvent(Widget.java:2095) at org.eclipse.swt.widgets.Shell.windowSendEvent(Shell.java:2253) at org.eclipse.swt.widgets.Display.windowProc(Display.java:5535) at org.eclipse.swt.internal.cocoa.OS.objc_msgSendSuper(Native Method) at org.eclipse.swt.widgets.Display.applicationSendEvent(Display.java:4989) at org.eclipse.swt.widgets.Display.applicationProc(Display.java:5138) at org.eclipse.swt.internal.cocoa.OS.objc_msgSend(Native Method) at org.eclipse.swt.internal.cocoa.NSApplication.sendEvent(NSApplication.java:128) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3610) at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2701) at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2665) at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2499) at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:679) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:668) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149) at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:123) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:344) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:622) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:577) at org.eclipse.equinox.launcher.Main.run(Main.java:1410) Session Data: eclipse.buildId=M20120208-0800 java.version=1.6.0_37 java.vendor=Apple Inc. BootLoader constants: OS=macosx, ARCH=x86_64, WS=cocoa, NL=en_US Framework arguments: -product org.eclipse.epp.package.jee.product -keyring /Users/saraiva/.eclipse_keyring -showlocation Command-line arguments: -os macosx -ws cocoa -arch x86_64 -product org.eclipse.epp.package.jee.product -keyring /Users/saraiva/.eclipse_keyring -showlocation

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  • How to fix notifyDataSetChanged/ListView problems in dynamic Adapter wrapper Android

    - by ipaterson
    Summary: Trying to dynamically add heading rows to a ListView via a custom adapter wrapper. ListView is having trouble keeping the scroll position in sync. Runnable demo project provided. I would like to dynamically add items to a list based on the values in a CursorAdapter, several positions ahead of what the user is currently viewing. To do this, I have an adapter that wraps the CursorAdapter and keeps the new content indexed in a SparseArray. The ListView needs to be updated when items are added to the custom adapter, but I have met a lot of pitfalls trying to get that to work and would love some advice. The demo project can be downloaded here: http://dl.dropbox.com/u/15334423/DynamicSectionedList.zip In the demo, the headings are added dynamically by looking ahead 10 places to find the correct position where the list items switch to the next letter. Each implementation of notifyDataSetChanged has problems as described: Demo 1 This demo shows the importance of notifyDataSetChanged(). On clicking anything, the app will crash. This is due to some sanity checking in ListView... mItemCount != adapter.getItemCount(). Moral is, we need to notify the list that data has changed. Demo 2 The natural next step is to notify the ListView of changes when changes occur. Unfortunately, doing so while the ListView is scrolling firmly breaks all touch interaction until the app switches out of touch mode. You will need to "fling scroll" far enough to generate new headings in order to notice this. Tapping the screen will not cause the scroll to stop, and once stopped none of the list items will be clickable. This is due to some if (!mDataChanged) { /* do very important stuff */ } code in AbsListView.onTouchEvent(). Demo 3 To fix this, Demo 3 introduces a pendingChanges flag and the custom Adapter gains a notifyDataSetChangedIfNeeded() which can be called by the ListView once it has entered a "safe" state for changes. The first point where changes must be notified is in ListView.layoutChildren(), so I overrode that method to first notify of changes if needed, then call through. Fling past at least one heading then click a list item. This doesn't quite work right, though I'm not totally sure why. Tapping or selecting an item with the keyboard/trackball causes the list to refresh without properly syncing the old position. It scrolls to the top of the list which is not acceptable. Demo 4 The scroll problem in Demo 3 can be conquered, at least in touch mode. By adding a call to notifyDataSetChangedIfNeeded() on touch down, the data change happens to take place at such a time that all touch interaction works as expected and the list position is properly synced. However, I can't find an analog for that when the device is not in touch mode, not to mention the fact that it definitely seems like a hack. The list almost always scrolls back to the top, I can't find out what causes it to occasionally maintain the correct position. Since Android is fighting me at each step of the way, I feel like there should be a better approach. Please try the demo, if any fixes can be applied to get it working that would be great! Many thanks to anyone who can look into this, hopefully if we can get the code working it will be useful for others trying to accomplish the same optimization for lists with headings.

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  • Netbeans platform projects - problems with wrapped jar files that have dependencies

    - by I82Much
    For starters, this question is not so much about programming in the NetBeans IDE as developing a NetBeans project (e.g. using the NetBeans Platform framework). I am attempting to use the BeanUtils library to introspect my domain models and provide the properties to display in a property sheet. Sample code: public class MyNode extends AbstractNode implements PropertyChangeListener { private static final PropertyUtilsBean bean = new PropertyUtilsBean(); // snip protected Sheet createSheet() { Sheet sheet = Sheet.createDefault(); Sheet.Set set = Sheet.createPropertiesSet(); APIObject obj = getLookup().lookup (APIObject.class); PropertyDescriptor[] descriptors = bean.getPropertyDescriptors(obj); for (PropertyDescriptor d : descriptors) { Method readMethod = d.getReadMethod(); Method writeMethod = d.getWriteMethod(); Class valueType = d.getClass(); Property p = new PropertySupport.Reflection(obj, valueType, readMethod, writeMethod); set.put(p); } sheet.put(set); return sheet; } I have created a wrapper module around commons-beanutils-1.8.3.jar, and added a dependency on the module in my module containing the above code. Everything compiles fine. When I attempt to run the program and open the property sheet view (i.e.. the above code actually gets run), I get the following error: java.lang.ClassNotFoundException: org.apache.commons.logging.LogFactory at java.net.URLClassLoader$1.run(URLClassLoader.java:200) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:188) at java.lang.ClassLoader.loadClass(ClassLoader.java:319) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:330) at java.lang.ClassLoader.loadClass(ClassLoader.java:254) at org.netbeans.ProxyClassLoader.loadClass(ProxyClassLoader.java:259) Caused: java.lang.ClassNotFoundException: org.apache.commons.logging.LogFactory starting from ModuleCL@64e48e45[org.apache.commons.beanutils] with possible defining loaders [ModuleCL@75da931b[org.netbeans.libs.commons_logging]] and declared parents [] at org.netbeans.ProxyClassLoader.loadClass(ProxyClassLoader.java:261) at java.lang.ClassLoader.loadClass(ClassLoader.java:254) at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:399) Caused: java.lang.NoClassDefFoundError: org/apache/commons/logging/LogFactory at org.apache.commons.beanutils.PropertyUtilsBean.<init>(PropertyUtilsBean.java:132) at org.myorg.myeditor.MyNode.<clinit>(MyNode.java:35) at org.myorg.myeditor.MyEditor.<init>(MyEditor.java:33) at org.myorg.myeditor.OpenEditorAction.actionPerformed(OpenEditorAction.java:13) at org.openide.awt.AlwaysEnabledAction$1.run(AlwaysEnabledAction.java:139) at org.netbeans.modules.openide.util.ActionsBridge.implPerformAction(ActionsBridge.java:83) at org.netbeans.modules.openide.util.ActionsBridge.doPerformAction(ActionsBridge.java:67) at org.openide.awt.AlwaysEnabledAction.actionPerformed(AlwaysEnabledAction.java:142) at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2028) at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2351) at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387) at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242) at javax.swing.AbstractButton.doClick(AbstractButton.java:389) at com.apple.laf.ScreenMenuItem.actionPerformed(ScreenMenuItem.java:95) at java.awt.MenuItem.processActionEvent(MenuItem.java:627) at java.awt.MenuItem.processEvent(MenuItem.java:586) at java.awt.MenuComponent.dispatchEventImpl(MenuComponent.java:317) at java.awt.MenuComponent.dispatchEvent(MenuComponent.java:305) [catch] at java.awt.EventQueue.dispatchEvent(EventQueue.java:638) at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:125) at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:296) at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:211) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:201) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:196) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:188) at java.awt.EventDispatchThread.run(EventDispatchThread.java:122) I understand that beanutils is using the commons-logging component. I have tried adding the commons-logging component in two different ways (creating a wrapper library around the commons-logging library, and putting a dependency on the Commons Logging Integration library). Neither solves the problem. I noticed that the same problem occurs with other wrapped libraries; if they themselves have external dependencies, the ClassNotFoundExceptions propagate like mad, even if I've wrapped the jars of the libraries they require and added them as dependencies to the original wrapped library module. Pictorially: I'm at my wits end here. I noticed similar problems while googling: Is there a known bug on NB Module dependency Same issue I'm facing but when wrapping a different jar NetBeans stance on this - none of the 3 apply to me. None conclusively help me. Thank you, Nick

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  • Unresolved compilation problems -- can't use .jar files that I have created

    - by Mike
    I created a few .jar files and am trying to access them in another application - I have tried to use both Eclipse and IntelliJ and experience the same issue: java.lang.Error: Unresolved compilation problems: The import com.XXXX.XXXXXXXXX.project2 cannot be resolved The import com.XXXX.XXXXXXXXX.project2 cannot be resolved BeanFactory cannot be resolved to a type Author cannot be resolved to a type AuthorFactoryImpl cannot be resolved to a type Author cannot be resolved to a type Author cannot be resolved to a type I have been using Maven during this process and the jars compile fine. I have included them on the file path using both the Maven .pom file and directly assigning them. I also have unassigned the direct file path and left the reference in Maven and vise versa -- no difference. See below .jar file class info: file structure: Author.java BeanWithIdentityInterface Books Subject ie: Interface: package com.XXXX.training; /** * Created with IntelliJ IDEA. * User: kBPersonal * Date: 11/5/12 * Time: 3:16 PM * */ public interface BeanWithIdentityInterface <I> { I getId(); } Author.java: package com.XXXX.training; /** * Created with IntelliJ IDEA. * User: kBPersonal * Date: 10/25/12 * Time: 12:03 PM */ public class Author implements BeanWithIdentityInterface <Integer>{ private Integer id = null; private String name = null; private String picture = null; private String bio = null; public Author(Integer id, String bio, String name, String picture) { this.id = id; this.bio = bio; this.name = name; this.picture = picture; } public Author (){} @Override public Integer getId() { return id; } public void setId(Integer id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getPicture() { return picture; } public void setPicture(String picture) { this.picture = picture; } public String getBio() { return bio; } public void setBio(String bio) { this.bio = bio; } @Override public String toString() { return "\n\tAuthor Id: "+this.getId() + " | Bio:"+ this.getBio()+ " | Name:"+ this.getName()+ " | Picture: "+ this.getPicture(); } } implementing Servlet: package com.acentia.training.project3.controller; import com.acentia.training.*; import com.acentia.training.project2.AuthorFactoryImpl; import com.acentia.training.project2.BeanFactory; import javax.servlet.ServletException; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import java.io.IOException; import java.io.PrintWriter; /** * Created with IntelliJ IDEA. * User: kBPersonal * Date: 11/11/12 * Time: 6:34 PM * */ public class ListAuthorServlet extends AbstractBaseServlet { private static final long serialVersionUID = -6934109551750492182L; public void doProcess(final HttpServletRequest request, final HttpServletResponse response) throws IOException { final BeanFactory<Author, Integer> authorFactory = new AuthorFactoryImpl(); Author author = null; if (authorFactory != null) { author = (Author) authorFactory.getMember(5); } I can't pull the Author class. Any help would be greatly appreciated.

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  • DSP - Problems using the inverse Fast Fourier Transform

    - by Trap
    I've been playing around a little with the Exocortex implementation of the FFT, but I'm having some problems. First, after calculating the inverse FFT of an unchanged frequency spectrum obtained by a previous forward FFT, one would expect to get the original signal back, but this is not the case. I had to figure out that I needed to scale the FFT output to about 1 / fftLength to get the amplitudes ok. Why is this? Second, whenever I modify the amplitudes of the frequency bins before calling the iFFT the signal gets distorted at low frequencies. However, this does not happen if I attenuate all the bins by the same factor. Let me put a very simplified example of the output buffer of a 4-sample FFT: // Bin 0 (DC) FFTOut[0] = 0.0000610351563 FFTOut[1] = 0.0 // Bin 1 FFTOut[2] = 0.000331878662 FFTOut[3] = 0.000629425049 // Central bin FFTOut[4] = -0.0000381469727 FFTOut[5] = 0.0 // Bin 3, this is a negative frequency bin. FFTOut[6] = 0.000331878662 FFTOut[7] = -0.000629425049 The output is composed of pairs of floats, each representing the real and imaginay parts of a single bin. So, bin 0 (array indexes 0, 1) would represent the real and imaginary parts of the DC frequency. As you can see, bins 1 and 3 both have the same values, (except for the sign of the Im part), so I guess these are the negative frequency values, and finally indexes (4, 5) would be the central frequency bin. To attenuate the frequency bin 1 this is what I do: // Attenuate the 'positive' bin FFTOut[2] *= 0.5; FFTOut[3] *= 0.5; // Attenuate its corresponding negative bin. FFTOut[6] *= 0.5; FFTOut[7] *= 0.5; For the actual tests I'm using a 1024-length FFT and I always provide all the samples so no 0-padding is needed. // Attenuate var halfSize = fftWindowLength / 2; float leftFreq = 0f; float rightFreq = 22050f; for( var c = 1; c < halfSize; c++ ) { var freq = c * (44100d / halfSize); // Calc. positive and negative frequency locations. var k = c * 2; var nk = (fftWindowLength - c) * 2; // This kind of attenuation corresponds to a high-pass filter. // The attenuation at the transition band is linearly applied, could // this be the cause of the distortion of low frequencies? var attn = (freq < leftFreq) ? 0 : (freq < rightFreq) ? ((freq - leftFreq) / (rightFreq - leftFreq)) : 1; mFFTOut[ k ] *= (float)attn; mFFTOut[ k + 1 ] *= (float)attn; mFFTOut[ nk ] *= (float)attn; mFFTOut[ nk + 1 ] *= (float)attn; } Obviously I'm doing something wrong but can't figure out what or where.

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  • Extjs Tooltips, IFrames and IE => Problems

    - by Chau
    I have an application using OpenLayers, Extjs and GeoExt. My application runs fine, but I need it to be placed inside an IFrame in another page. When doing this, my toolbar becomes responseless in Internet Explorer. The cause is Ext.QuickTips.init();. Comment out this line and everything works fine - except the quick tips ofcourse =) But why is it causing problems? Is it because I'm using it wrong, placing it wrong or just because it doesn't like IE and IFrames? Link: Link to the IFrame page IFrame page: <!DOCTYPE HTML PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html> <body> <iframe height="660" src="http://www.gis34.dk/doctype.html" width="660"> <p>Din browser understøtter ikke <i>frames</i>.</p> </iframe> </body> </html> Application page: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <script type="text/javascript" language="javascript"> var map; var mapPanel; var mainViewport; var toolbarItems = []; </script> <link href="/Libraries/Ext/resources/css/ext-all.css" type="text/css" rel="stylesheet" /> <link href="/Libraries/GeoExt/resources/css/geoext-all-debug.css" type="text/css" rel="stylesheet" /> <link href="/CSS/Extjs.css" type="text/css" rel="stylesheet" /> <link href="/CSS/OpenLayers.css" type="text/css" rel="stylesheet" /> <link href="/CSS/Poseidon.css" type="text/css" rel="stylesheet" /> </head> <body> <script src="/Libraries/OpenLayers/lib/OpenLayers.js" type="text/javascript"></script> <script src="/Libraries/Ext/adapter/ext/ext-base-debug.js" type="text/javascript"></script> <script src="/Libraries/Ext/ext-all-debug.js" type="text/javascript"></script> <script src="/Libraries/GeoExt/lib/GeoExt.js" type="text/javascript"></script> <script src="http://www.openstreetmap.org/openlayers/OpenStreetMap.js" type="text/javascript"></script> <div id="map"></div> <script type="text/javascript"> Ext.onReady(function() { Ext.QuickTips.init(); Ext.BLANK_IMAGE_URL = '/Libraries/Ext/resources/images/default/s.gif'; var layer = new OpenLayers.Layer.OSM.Mapnik( 'OpenStreetMap Mapnik', { sphericalMercator: true }, { isBaseLayer: true } ); var mapOptions = { projection: 'EPSG:900913', units: 'm', maxExtent: new OpenLayers.Bounds(1390414.0280576,7490505.7050394,1406198.2743956,7501990.3685372), minResolution: '0.125', maxResolution: '1000', restrictedExtent: new OpenLayers.Bounds(1390414.0280576,7490505.7050394,1406198.2743956,7501990.3685372), controls: [ ] }; map = new OpenLayers.Map('', mapOptions); var Navigation = new OpenLayers.Control.Navigation(); action = new GeoExt.Action( { control: new OpenLayers.Control.ZoomBox({out:false}), map: map, tooltip: "Zoom ind", iconCls: 'icon-zoom-in', toggleGroup: 'mapTools', group: 'mapTools' }); toolbarItems.push(action); action = new GeoExt.Action( { control: new OpenLayers.Control.ZoomBox({out:true}), map: map, tooltip: "Zoom ud", iconCls: 'icon-zoom-out', toggleGroup: 'mapTools', group: 'mapTools' }); toolbarItems.push(action); action = new GeoExt.Action({ control: new OpenLayers.Control.ZoomToMaxExtent(), map: map, iconCls: 'icon-zoom-max-extent', tooltip: 'Zoom helt ud' }); toolbarItems.push(action); map.addControl(Navigation); map.addLayer(layer); mapPanel = new GeoExt.MapPanel( { border: true, id: 'mapPanel', region: "center", map: map, tbar: toolbarItems }); mainViewport = new Ext.Viewport( { layout: "fit", hideBorders: true, items: { layout: "border", deferredRender: false, items: [ mapPanel ] } }); }); </script> </body> </html>

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  • Having problems using haml and rails3

    - by Victor Rodrigues
    After installing rails3, I'm experiencing problems when trying to use haml with it. I have the updated gem installed, and after rails PROJECT_NAME , I did haml --rails in its root. It apparently had worked fine, since I have haml folder inside plugins, init.rb, as expected. But when I try to rake, or rails server, I get: rake aborted! no such file to load -- haml With --trace I get this: ** Invoke default (first_time) ** Invoke test (first_time) ** Execute test ** Invoke test:units (first_time) ** Invoke db:test:prepare (first_time) ** Invoke db:abort_if_pending_migrations (first_time) ** Invoke environment (first_time) ** Execute environment rake aborted! no such file to load -- haml /usr/local/lib/ruby/gems/1.8/gems/activesupport-3.0.0.beta/lib/active_support/dependencies.rb:167:in `require' /usr/local/lib/ruby/gems/1.8/gems/activesupport-3.0.0.beta/lib/active_support/dependencies.rb:167:in `require' /usr/local/lib/ruby/gems/1.8/gems/activesupport-3.0.0.beta/lib/active_support/dependencies.rb:537:in `new_constants_in' /usr/local/lib/ruby/gems/1.8/gems/activesupport-3.0.0.beta/lib/active_support/dependencies.rb:167:in `require' RAILS_PROJECT_ROOT/vendor/plugins/haml/init.rb:5 /usr/local/lib/ruby/gems/1.8/gems/railties-3.0.0.beta/lib/rails/plugin.rb:49 /usr/local/lib/ruby/gems/1.8/gems/railties-3.0.0.beta/lib/rails/initializable.rb:25:in `instance_exec' /usr/local/lib/ruby/gems/1.8/gems/railties-3.0.0.beta/lib/rails/initializable.rb:25:in `run' /usr/local/lib/ruby/gems/1.8/gems/railties-3.0.0.beta/lib/rails/initializable.rb:55:in `run_initializers' /usr/local/lib/ruby/gems/1.8/gems/railties-3.0.0.beta/lib/rails/initializable.rb:54:in `each' /usr/local/lib/ruby/gems/1.8/gems/railties-3.0.0.beta/lib/rails/initializable.rb:54:in `run_initializers' /usr/local/lib/ruby/gems/1.8/gems/railties-3.0.0.beta/lib/rails/application.rb:71:in `initialize!' /usr/local/lib/ruby/gems/1.8/gems/railties-3.0.0.beta/lib/rails/application.rb:112:in `initialize_tasks' /usr/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:636:in `call' /usr/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:636:in `execute' /usr/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:631:in `each' /usr/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:631:in `execute' /usr/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:597:in `invoke_with_call_chain' /usr/local/lib/ruby/1.8/monitor.rb:242:in `synchronize' /usr/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:590:in `invoke_with_call_chain' /usr/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:607:in `invoke_prerequisites' /usr/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:604:in `each' /usr/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:604:in `invoke_prerequisites' /usr/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:596:in `invoke_with_call_chain' /usr/local/lib/ruby/1.8/monitor.rb:242:in `synchronize' /usr/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:590:in `invoke_with_call_chain' /usr/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:607:in `invoke_prerequisites' /usr/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:604:in `each' /usr/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:604:in `invoke_prerequisites' /usr/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:596:in `invoke_with_call_chain' /usr/local/lib/ruby/1.8/monitor.rb:242:in `synchronize' /usr/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:590:in `invoke_with_call_chain' /usr/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:607:in `invoke_prerequisites' /usr/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:604:in `each' /usr/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:604:in `invoke_prerequisites' /usr/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:596:in `invoke_with_call_chain' /usr/local/lib/ruby/1.8/monitor.rb:242:in `synchronize' /usr/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:590:in `invoke_with_call_chain' /usr/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:583:in `invoke' /usr/local/lib/ruby/gems/1.8/gems/railties-3.0.0.beta/lib/rails/test_unit/testing.rake:45 /usr/local/lib/ruby/gems/1.8/gems/railties-3.0.0.beta/lib/rails/test_unit/testing.rake:43:in `collect' /usr/local/lib/ruby/gems/1.8/gems/railties-3.0.0.beta/lib/rails/test_unit/testing.rake:43 /usr/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:636:in `call' /usr/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:636:in `execute' /usr/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:631:in `each' /usr/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:631:in `execute' /usr/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:597:in `invoke_with_call_chain' /usr/local/lib/ruby/1.8/monitor.rb:242:in `synchronize' /usr/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:590:in `invoke_with_call_chain' /usr/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:607:in `invoke_prerequisites' /usr/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:604:in `each' /usr/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:604:in `invoke_prerequisites' /usr/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:596:in `invoke_with_call_chain' /usr/local/lib/ruby/1.8/monitor.rb:242:in `synchronize' /usr/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:590:in `invoke_with_call_chain' /usr/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:583:in `invoke' /usr/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2051:in `invoke_task' /usr/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2029:in `top_level' /usr/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2029:in `each' /usr/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2029:in `top_level' /usr/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2068:in `standard_exception_handling' /usr/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2023:in `top_level' /usr/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2001:in `run' /usr/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2068:in `standard_exception_handling' /usr/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:1998:in `run' /usr/local/lib/ruby/gems/1.8/gems/rake-0.8.7/bin/rake:31 /usr/local/bin/rake:19:in `load' /usr/local/bin/rake:19

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  • Problems with Google Maps API v3 + jQuery UI Tabs

    - by Bears will eat you
    There are a number of problems, which seem to be fairly well-known, when using the Google Maps API to render a map within a jQuery UI tab. I've seen SO questions posted about similar issues (here and here, for example) but the solutions there only seem to work for v2 of the Maps API. Other references I checked out are here and here, along with pretty much everything I could dig up through Googling. I've been trying to stuff a map (using v3 of the API) into a jQuery tab with mixed results. I'm using the latest versions of everything (currently jQuery 1.3.2, jQuery UI 1.7.2, don't know about Maps). This is the markup & javascript: <body> <div id="dashtabs"> <span class="logout"> <a href="go away">Log out</a> </span> <!-- tabs --> <ul class="dashtabNavigation"> <li><a href="#first_tab" >First</a></li> <li><a href="#second_tab" >Second</a></li> <li><a href="#map_tab" >Map</a></li> </ul> <!-- tab containers --> <div id="first_tab">This is my first tab</div> <div id="second_tab">This is my second tab</div> <div id="map_tab"> <div id="map_canvas"></div> </div> </div> </body> and $(document).ready(function() { var map = null; $('#dashtabs').tabs(); $('#dashtabs').bind('tabsshow', function(event, ui) { if (ui.panel.id == 'map_tab' && !map) { map = initializeMap(); google.maps.event.trigger(map, 'resize'); } }); }); function initializeMap() { // Just some canned map for now var latlng = new google.maps.LatLng(-34.397, 150.644); var myOptions = { zoom: 8, center: latlng, mapTypeId: google.maps.MapTypeId.ROADMAP }; return new google.maps.Map($('#map_canvas')[0], myOptions); } And here's what I've found that does/doesn't work (for Maps API v3): Using the off-left technique as described in the jQuery UI Tabs documentation (and in the answers to the two questions I linked) doesn't work at all. In fact, the best-functioning code uses the CSS .ui-tabs .ui-tabs-hide { display: none; } instead. The only way to get a map to display in a tab at all is to set the CSS width and height of #map_canvas to be absolute values. Changing the width and height to auto or 100% causes the map to not display at all, even if it's already been successfully rendered (using absolute width and height). I couldn't find it documented anywhere outside of the Maps API, but map.checkResize() won't work anymore. Instead, you have to fire a resize event by calling google.maps.event.trigger(map, 'resize'). If the map is not initialized inside of a function bound to a tabsshow event, the map itself is rendered correctly but the controls are not - most are just plain missing. So, here are my questions: Does anyone else have experience accomplishing this same feat? If so, how did you figure out what would actually work, since the documented tricks don't work for Maps API v3? What about loading tab content using Ajax as per the jQuery UI docs? I haven't had a chance to play around with it but my guess is that it's going to break Maps even more. What are the chances of getting it to work (or is it not worth trying)? How do I make the map fill the largest possible area? I'd like it to fill the tab and adapt to page resizes, much in the way that it's done over at maps.google.com. But, as I said, I appear to be stuck with applying only absolute width and height CSS to the map div. Sorry if this was long-winded but this might be the only documentation for Maps API v3 + jQuery tabs. Cheers!

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