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• Strange crashes when using MPMoviePlayerController in iPad and iPad simulator with iOS 4.2.

  - by Dave L

  I'm getting crashes when trying to play a movie using MPMoviePlayerController on the iPad and in the iPad simulator using iOS 4.2. I am building using xcode 3.2.5 and the 4.2 SDK. When running on an iPad using iOS 3.2 or in the iPad simulator 3.2, the same code works fine, but on an iPad running 4.2 or in the iPad simulator 4.2, it crashes. The crash is due to an exception for calling an unknown selector down somewhere deep in the cocoa libraries, something tries to call a selector called "setHitRectInsets:" on a UIButton object. Also, the crash happens after control has returned to the main event loop. Anybody have any idea what might be causing this? Here is the code (roughly, some extraneous stuff deleted that doesn't seem to have any effect) that is crashing: NSString *fullMovieFilename = [[NSBundle mainBundle] pathForResource:@"movie" ofType:@"m4v"]; NSURL *movieURL = [NSURL fileURLWithPath:fullMovieFilename]; moviePlayer = [[MPMoviePlayerController alloc] initWithContentURL:movieURL]; moviePlayer.controlStyle = MPMovieControlStyleNone; // crash happens regardless of the setting here [moviePlayer.view setFrame:self.view.bounds]; [self.view addSubview:moviePlayer.view]; [moviePlayer setFullscreen:YES animated:YES]; // crash happens whether i use fullscreen or not [moviePlayer play]; The same code also works just find if I build using Xcode 3.2.3 and the 4.0 SDK. The crash stack trace looks like this: 2011-03-04 23:08:22.017 MyApp[31610:207] -[UIButton setHitRectInsets:]: unrecognized selector sent to instance 0x990bc60 2011-03-04 23:08:22.020 MyApp[31610:207] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[UIButton setHitRectInsets:]: unrecognized selector sent to instance 0x990bc60' *** Call stack at first throw: ( 0 CoreFoundation 0x0151abe9 __exceptionPreprocess + 185 1 libobjc.A.dylib 0x0166f5c2 objc_exception_throw + 47 2 CoreFoundation 0x0151c6fb -[NSObject(NSObject) doesNotRecognizeSelector:] + 187 3 CoreFoundation 0x0148c366 ___forwarding___ + 966 4 CoreFoundation 0x0148bf22 _CF_forwarding_prep_0 + 50 5 MediaPlayer 0x011b5bdb -[MPTransportControls createButtonForPart:] + 380 6 MediaPlayer 0x011b65d5 -[MPTransportControls _updateAdditions:removals:forPart:] + 110 7 MediaPlayer 0x011b4d78 -[MPTransportControls _reloadViewWithAnimation:] + 299 8 MediaPlayer 0x011b621a -[MPTransportControls setVisibleParts:] + 49 9 MediaPlayer 0x011b6e4a -[MPTransportControls initWithFrame:] + 173 10 MediaPlayer 0x011f9188 -[MPInlineTransportControls initWithFrame:] + 78 11 MediaPlayer 0x011f193a -[MPInlineVideoOverlay layoutSubviews] + 158 12 QuartzCore 0x00d6e451 -[CALayer layoutSublayers] + 181 13 QuartzCore 0x00d6e17c CALayerLayoutIfNeeded + 220 14 QuartzCore 0x00d6e088 -[CALayer layoutIfNeeded] + 111 15 MediaPlayer 0x011f130c -[MPInlineVideoOverlay setAllowsWirelessPlayback:] + 46 16 MediaPlayer 0x011f5b0d -[MPInlineVideoViewController _overlayView] + 526 17 MediaPlayer 0x011f6359 -[MPInlineVideoViewController _layoutForItemTypeAvailable] + 1350 18 Foundation 0x000e56c1 _nsnote_callback + 145 19 CoreFoundation 0x014f2f99 __CFXNotificationPost_old + 745 20 CoreFoundation 0x0147233a _CFXNotificationPostNotification + 186 21 Foundation 0x000db266 -[NSNotificationCenter postNotificationName:object:userInfo:] + 134 22 Foundation 0x000e75a9 -[NSNotificationCenter postNotificationName:object:] + 56 23 MediaPlayer 0x01184dd6 -[MPAVItem _updateForNaturalSizeChange] + 278 24 MediaPlayer 0x011818e4 __-[MPAVItem blockForDirectAVControllerNotificationReferencingItem:]_block_invoke_1 + 82 25 MediaPlayer 0x011899ba -[MPAVController _postMPAVControllerSizeDidChangeNotificationWithItem:] + 138 26 Foundation 0x000e56c1 _nsnote_callback + 145 27 CoreFoundation 0x014f2f99 __CFXNotificationPost_old + 745 28 CoreFoundation 0x0147233a _CFXNotificationPostNotification + 186 29 Foundation 0x000db266 -[NSNotificationCenter postNotificationName:object:userInfo:] + 134 30 Celestial 0x052a35b2 -[NSObject(NSObject_AVShared) postNotificationWithDescription:] + 176 31 Celestial 0x052ab214 -[AVController fpItemNotification:sender:] + 735 32 Celestial 0x052b5305 -[AVPlaybackItem fpItemNotificationInfo:] + 640 33 Celestial 0x052a3d5c -[AVObjectRegistry safeInvokeWithDescription:] + 211 34 Foundation 0x000fa9a6 __NSThreadPerformPerform + 251 35 CoreFoundation 0x014fc01f __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 15 36 CoreFoundation 0x0145a28b __CFRunLoopDoSources0 + 571 37 CoreFoundation 0x01459786 __CFRunLoopRun + 470 38 CoreFoundation 0x01459240 CFRunLoopRunSpecific + 208 39 CoreFoundation 0x01459161 CFRunLoopRunInMode + 97 40 GraphicsServices 0x01e4f268 GSEventRunModal + 217 41 GraphicsServices 0x01e4f32d GSEventRun + 115 42 UIKit 0x0038a42e UIApplicationMain + 1160 43 MyApp 0x0000837a main + 102 44 MpApp 0x00002009 start + 53 ) terminate called after throwing an instance of 'NSException' Been fighting with this for several days, and have searched the internet quite a bit for anybody having similar problems, all with no luck. Any suggestions would be greatly appreciated.

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• Error: NAND: could not write file /hd2/android-sdk-linux_86/add-ons/google_apis-7_r01/images//system

  - by H.B.Dave

  I am new comer to Android development. Installed fresh Eclipse (Ganymede), Android android-sdk-linux_86. Tried HelloWorld program. Compiles OK. An AVD "my1" created for API level 7. The Emulator does not start, giving an error: [2010-03-11 16:49:49 - Emulator] NAND: could not write file /hd2/android-sdk-linux_86/add-ons/google_apis-7_r01/images//system.img, File exists Perplexed. Help requested.

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• XMLRPC Response Using ws-xmlrpc

  - by Dave

  Anyone have experience parsing complex response types using ws-xmlrpc? The service returns a HashMap with one of the values an Array, when I request the key of the array from the hashmap, java just returns "java.lang.Object". How do I access the contents of the array? Any ideas? Thanks in advance for your input.

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• pass ResultSet from servlet to JSP

  - by Dave

  Hi I am doing the following in my SampleServlet.java //Fill resultset from db ..... try { ArrayList Rows = new ArrayList(); while (resultSet.next()){ ArrayList row = new ArrayList(); for (int i = 1; i <= 7 ; i++){ row.add(resultSet.getString(i)); } Rows.add(row); } request.setAttribute("propertyList", Rows); RequestDispatcher requestDispatcher = getServletContext().getRequestDispatcher("/DisplayProperties.jsp"); requestDispatcher.forward(request,response); # and then in my jsp DisplayPropeties.jsp i have <% ArrayList rows = new ArrayList(); if (request.getSession().getAttribute("propertyList") != null) { rows = (ArrayList ) request.getSession().getAttribute("propertyList"); } %> but rows is allways null. Can anyone help with what I am doing wrong please.

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• What to subclass for clickedRow (NSTableView)

  - by dave-gennel

  Which method should I subclass to change the drawing when a row is clicked? (I want to change it in selecting the row).

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• High-quality ERD generator for PostgresQL under Linux?

  - by Dave Jarvis

  Background MySQL Workbench can produce appealing and high-quality ERDs such as: Research I have not found a tool that even comes close for PostgreSQL. Tools I have found: dbVisualizer - Yellow squares. AquaFold - Yellow squares. SQL Developer - Coloured squares. Dia - Coloured squares. SchemaBank - Can't export to PNG; looks okay, nothing stellar. SchemaSpy - XML export makes it possible to write an XSL skin... Gliffy - Incompatible Flash version. Druid - No. pgAdmin3 - Not applicable? phpPgAdmin - Couldn't login without a 30-minute configuration battle. Requirements Looking for an ERD tool: Visually stunning by default Can reverse-engineer a PostgreSQL (or JDBC-compliant) database Runs on Linux (or under WINE) Export high-resolution PNG (or SVG) FOSS

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• Interval tree algorithm that supports merging of intervals with no overlap

  - by Dave Griffiths

  I'm looking for an interval tree algorithm similar to the red-black interval tree in CLR but that supports merging of intervals by default so that there are never any overlapping intervals. In other words if you had a tree containing two intervals [2,3] and [5,6] and you added the interval [4,4], the result would be a tree containing just one interval [2,6]. Thanks Update: the use case I'm considering is calculating transitive closure. Interval sets are used to store the successor sets because they have been found to be quite compact. But if you represent interval sets just as a linked list I have found that in some situations they can become quite large and hence so does the time required to find the insertion point. Hence my interest in interval trees. Also there may be quite a lot of merging one tree with another (i.e. a set OR operation) - if both trees are large then it may be better to create a new tree using inorder walks of both trees rather than repeated insertions of each interval.

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• Xcode - Terminating due to uncaught exception for iphone app

  - by Dave

  When I try to cick on cell in my table view rather than take me to the next view I get a "Terminating due to uncaught exception" error. Here is the code from the debugger: 010-03-27 12:52:48.805 MultiDetailView[335:207] *** Terminating app due to uncaught exception 'NSRangeException', reason: '*** -[NSCFArray objectAtIndex:]: index (1) beyond bounds (1)' 2010-03-27 12:52:48.809 MultiDetailView[335:207] Stack: ( 40849995, 2476418313, 40849435, 40849274, 592937, 50711, 5698680, 5701555, 5697083, 5705902, 11163, 3128431, 3089967, 191242, 40390524, 40386632, 49203357, 49203554, 2788833, 9060, 8914 ) Any ideas on what I should do ? Thanks.

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• Stack overflow in xp cmd console

  - by Dave

  I am using an older program whose source code I cannot see. I am using the cmd.exe console in windows xp. The program ran with no problems on an xp machine last year, while a stack overflow code 2000 error was observed on a different xp machine (easy fix - use the machine that works). I tried running the program on the previously working machine lately, and now am getting the same error. No changes to the os were made and I did not change the service pack version. Any ideas on how to get around this stack overflow error so I can use the program? Dosbox will at least open the program, however it does not run to completion. Thanks!

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• Filter Queryset in Django inlineformset_factory

  - by Dave

  I am trying to use inlineformset_factory to generate a formset. My models are defined as: class Measurement(models.Model): subject = models.ForeignKey(Animal) experiment = models.ForeignKey(Experiment) assay = models.ForeignKey(Assay) values = models.CommaSeparatedIntegerField(blank=True, null=True) class Experiment(models.Model): date = models.DateField() notes = models.TextField(max_length = 500, blank=True) subjects= models.ManyToManyField(Subject) in my view i have: def add_measurement(request, experiment_id): experiment = get_object_or_404(Experiment, pk=experiment_id) MeasurementFormSet = inlineformset_factory(Experiment, Measurement, extra=10, exclude=('experiment')) if request.method == 'POST': formset = MeasurementFormSet(request.POST,instance=experiment) if formset.is_valid(): formset.save() return HttpResponseRedirect( experiment.get_absolute_url() ) else: formset = MeasurementFormSet(instance=experiment) return render_to_response("data_entry_form.html", {"formset": formset, "experiment": experiment }, context_instance=RequestContext(request)) but i want to restrict the Measurement.subject field to only subjects defined in the Experiment.subjects queryset. I have tried a couple of different ways of doing this but I am a little unsure what the best way to accomplish this is. I tried to over-ride the BaseInlineFormset class with a new queryset, but couldnt figure out how to correctly pass the experiment parameter.

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• Jquery cookie plugin - conditional content determined by cookie being set

  - by Dave

  Hello I have a sign up form that is displayed to all new site visitors. If a user fills out the form, the next time they visit the site, I would like to display a "welcome back" message where the form would usually sit. I am trying to do this via the jquery cookie plugin (http://plugins.jquery.com/project/Cookie). My form would look like this: <div id="sign_up_form_wrapper"><form id="sign_up" action="" method="POST" name="form"> <input type="checkbox" name="checkbox" id="checkbox" value="1">&nbsp; I accept the terms and conditions</a> <br /><br /><input type="submit" value="ENTER"> </form></div> And I am setting my cookie here: <script type="text/javascript" language="javascript"> $().ready(function() { $('#sign_upm').submit(function(e) { e.preventDefault(); if ($('#sign_up input[name=checkbox]').is(':checked')) { $.cookie('agreed_to_terms', '1', { path: '/', expires: 999999 }); } }); }); </script> That will set the cookie when a user has checked the box, but now I need to do somehting like this: if the cookie has been set, do this: <div id="sign_up_form_wrapper"> <p>Welcome back, John</p> </div> otherwise do this: <div id="sign_up_form_wrapper"> <!-- full form code here --> </div> Any ideas or pointers would be very appreciated, thanks.

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• UITableView scrolling to specific position

  - by Dave

  I am using iPhone SDK 3.1.3. I have a UITableViewController which gets data from another controller. The tableview is added as a subview to the mainview but the frame is set so that it is not visible. The tableview frame is updated and made to slide over the main view by tapping on a button. The table view appears and i scroll to the last row. if i select the last row, i reload the table with more data. The table gets updated with more data. everything works fine except the scroll position is always the top. I need the scroll position to be the last row that I clicked on to load more data. I save the scroll position and call the following code after it loads more data. It executes without issues but the scroll position is always the top. [theTableView scrollTRowAtIndexPath:[NSIndexPath indexPathForRow:savedScrollPosition inSection:0] atScrollPosition:savedScrollPosition animated:NO]; The above seems to have no effect. ViewWillAppear: ViewDidAppear: does not fire and I am told that if the view controller is instantiated in code, which is the case, these don't fire.

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• Android Activity is displayed after user unlocks the screen

  - by Dave

  Hi, I was wondering if anyone understood how to make your application be displayed when you unlock the screen. I have an application where the user turns on a Bluetooth device, it connects to the phone, and the user should be presented with a UI. Having them hunt for the app or using the notification menu is not a workable option (too much work and not the obvious behavior). The problem is that: When the screen is unlocked: - you can popup the activity from the background service when Bluetooth connects to a device - User is happy because the UI is right there When the screen is locked: - The application gets started but is destroyed - User unlocks the phone and nothing is there but the homescreen One work around would be to disable the keyguard when the application gets woken up but the nuclear option is a pretty bad option. PS: I know the standard Android assumption is that you shouldn't do this. In the normal case this behavior is fine, but in this case I explicitly did something I want the phone to respond without adding more work for the user to do. As per Google's guidelines if you don't like this behavior there can be an option for you to turn this off or you can not use the application.

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• UIKeyBoard Return Button UIReturnKeyDone

  - by Dave

  textfield.returnKeyTYpe = UIReturnKeyDone So the above makes my Return button on the keyboard to say Done. I have seen Apps with Blue color button on the UIKeyBoard. Is that simple enough to do? How do I change the background color of the Return key?

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• How to undo fill-paragraph in emacs?

  - by Dave Paroulek

  I have a text file that is pretty long. Any easy way to "undo" a M-q (fill-paragraph) on a file that was written and saved a while ago? For example, I want to change this: They're coming to take me away, ha-haaa!! They're coming to take me away, ho-ho, hee-hee, ha-haaa To this: They're coming to take me away, ha-haaa!! They're coming to take me away, ho-ho, hee-hee, ha-haaa

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• The problem of outsourcing

  - by Dave

  I work on a project for like two years..but because all the programming stuff was outsourced I dun hav a chance to do more prograing or even technical work... I got very demoralized that nowadaysy job scope is all about delegating other to do the work but I can't learn much technical stuff? What should I do to let myself do more technical stuff like programming at work I thought of coming up with tools that will aid my main application or just resolve issues on my own which I doing so right now any other suggestion anyone?

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• FxCop hates my usage of MVVM

  - by Dave

  I've just started to work with FxCop to see how poorly my code does against its full set of rules. I'm starting off with the "Breaking" rules, and the first one I came across was CA2227, which basically says that you should make a collection property's setter readonly, so that you can't accidentally change the collection data. Since I'm using MVVM, I've found it very convenient to use an ObservableCollection with get/set properties because it makes my GUI updates easy and concise in the code-behind. However, I can also see what FxCop is complaining about. Another situation that I just ran into is with WF, where I need to set the parameters when creating the workflow, and I'd hate to have to write a wrapper class around the collection I'm using just to avoid this particular error message. For example, here's a sample runtime error message that I get when I make properties readonly: The activity 'MyWorkflow' has no public writable property named 'MyCollectionOfStuff' What are you opinions on this? I could either ignore this particular error, but that's probably not good because I could conceivably violate this rule elsewhere in the code where MVVM doesn't apply (model only code, for example). I think I could also change it from a property to a class with methods to manipulate the underlying collection, and then raise the necessary notification from the setter method. I'm a little confused... can anyone shed some light on this?

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• Loading, listing, and using R Modules and Functions in PL/R

  - by Dave Jarvis

  I am having difficulty with: Listing the R packages and functions available to PostgreSQL. Installing a package (such as Kendall) for use with PL/R Calling an R function within PostgreSQL Listing Available R Packages Q.1. How do you find out what R modules have been loaded? SELECT * FROM r_typenames(); That shows the types that are available, but what about checking if Kendall( X, Y ) is loaded? For example, the documentation shows: CREATE TABLE plr_modules ( modseq int4, modsrc text ); That seems to allow inserting records to dictate that Kendall is to be loaded, but the following code doesn't explain, syntactically, how to ensure that it gets loaded: INSERT INTO plr_modules VALUES (0, 'pg.test.module.load <-function(msg) {print(msg)}'); Q.2. What would the above line look like if you were trying to load Kendall? Q.3. Is it applicable? Installing R Packages Using the "synaptic" package manager the following packages have been installed: r-base r-base-core r-base-dev r-base-html r-base-latex r-cran-acepack r-cran-boot r-cran-car r-cran-chron r-cran-cluster r-cran-codetools r-cran-design r-cran-foreign r-cran-hmisc r-cran-kernsmooth r-cran-lattice r-cran-matrix r-cran-mgcv r-cran-nlme r-cran-quadprog r-cran-robustbase r-cran-rpart r-cran-survival r-cran-vr r-recommended Q.4. How do I know if Kendall is in there? Q.5. If it isn't, how do I find out what package it is in? Q.6. If it isn't in a package suitable for installing with apt-get (aptitude, synaptic, dpkg, what have you), how do I go about installing it on Ubuntu? Q.7. Where are the installation steps documented? Calling R Functions I have the following code: EXECUTE 'SELECT ' 'regr_slope( amount, year_taken ),' 'regr_intercept( amount, year_taken ),' 'corr( amount, year_taken ),' 'sum( measurements ) AS total_measurements ' 'FROM temp_regression' INTO STRICT slope, intercept, correlation, total_measurements; This code calls the PostgreSQL function corr to calculate Pearson's correlation over the data. Ideally, I'd like to do the following (by switching corr for plr_kendall): EXECUTE 'SELECT ' 'regr_slope( amount, year_taken ),' 'regr_intercept( amount, year_taken ),' 'plr_kendall( amount, year_taken ),' 'sum( measurements ) AS total_measurements ' 'FROM temp_regression' INTO STRICT slope, intercept, correlation, total_measurements; Q.8. Do I have to write plr_kendall myself? Q.9. Where can I find a simple example that walks through: Loading an R module into PG. Writing a PG wrapper for the desired R function. Calling the PG wrapper from a SELECT. For example, would the last two steps look like: create or replace function plr_kendall( _float8, _float8 ) returns float as ' agg_kendall(arg1, arg2) ' language 'plr'; CREATE AGGREGATE agg_kendall ( sfunc = plr_array_accum, basetype = float8, -- ??? stype = _float8, -- ??? finalfunc = plr_kendall ); And then the SELECT as above? Thank you!

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• Android Map Performance poor because of many Overlays?

  - by Dave

  Hi, I have a map in my android application that shows many markers (~20-50). But the app performs very poor when i try to scroll/zoom (in Google Android Maps i did a sample search for pizza and there were also some 20-50 results found and i didn't notice any particular performance problems when zooming/scrolling through the map). Here is my (pseudo)code: onCreate() { .... drawable = this.getResources().getDrawable(R.drawable.marker1); itemizedOverlay = new MyItemizedOverlay(drawable,mapView); ... callWebServiceToRetrieveData(); createMarkers(); } createMarkers(){ for(elem:bigList){ GeoPoint geoPoint = new GeoPoint((int)(elem.getLat()*1000000), (int) (elem.getLon()*1000000)); OverlayItem overlayItem = new OverlayItem(geoPoint, elem.getName(), elem.getData()); itemizedOverlay.addOverlay(overlayItem); mapOverlays.add(itemizedOverlay); } mapView.invalidate(); } the MyItemizedOverlay.addOverlay looks like this: public void addOverlay(OverlayItem overlay) { m_overlays.add(overlay); populate(); }

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• Clone behaviour - cannot set attribute value for clone?

  - by Dave Jarvis

  This code does not function as expected: // $field contains the name of a subclass of WMSInput. $fieldClone = clone $field; echo $fieldClone->getInputName(); // Method on abstract WMSInput superclass. $fieldClone->setInputName( 'name' ); echo $fieldClone->getInputName(); The WMSInput class: abstract class WMSInput { private $inputName; public function setInputName( $inputName ) { $this->inputName = $inputName; } } There are no PHP errors (error reporting is set to E_ALL). Actual Results email email Expected Results email name Any ideas?

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• How to turn off pdb generation and vshost for all Release builds

  - by Dave

  Every time I start a new piece of software I have to go into the configuration and turn off pdb file generation and the Visual Studio hosting process for Release builds. Is there any way to tell Visual Studio (2008 specifically) that I want to do that for all projects for the rest of time?

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• Loading a Page into a jQuery Dialog

  - by Dave

  I tend to follow a fairly "modular" approach to building applications and I recently started working with jQuery. The application I'm working on is going to be fairly large so I'm trying to break pieces out into separate files/modules when possible. One example of this is a "User Settings" dialog. This dialog has a form, a few tabs, and quite a good number of input fields so I want to develop it in a separate HTML file (PHP actually, but it can be considered HTML for the purposes of this example). It's an entire page in and of itself with all the tags you would expect such as: <html><head></head><body></body></html> So I can now develop, what I want to be, the dialog separate from the base application. This dialog has it's own Javascript (A LOT of Javascript, in fact) in the head as well, with jQuery $(document).ready(){} capturing, etc. Everything works flawlessly in isolation. However, when I attempt to load the jQuery modal dialog with the page (inside of the main application page), as one might expect, trouble ensues. Here's a brief, very simple, example of what it looks like: editUserDialog.load ("editUser.php", {id : $('#userList').val(), popup : "true"}, function () { editUserDialog.dialog ("option", "title" , "Edit User"); editUserDialog.dialog ('open'); }); (I'm passing in a "popup" flag to the page so that the page can determine its context -- i.e. as a page or inside of the jQuery dialog). Question 1: When I moved the code from the "head" into "body" (in the editUser.php page) it actually worked for the most part. It seemed that jQuery was calling the $(document).ready() function in the context of the body of the loaded file and not the head. Is this a bad idea? Question 2: Is my process for building this application just totally flawed to begin with? I've scoured the net to attempt to find a "best practices" sort of document to building reasonably large applications using jQuery/PHP without a lot of success so maybe there's something out there someone else is aware of that I've somehow missed. Thanks for bearing with me while I attempt to describe the issues I've encountered and I hope I've accurately described the problem.

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• UTF-8 character encoding battles json_encode()

  - by Dave Jarvis

  Quest I am looking to fetch rows that have accented characters. The encoding for the column (NAME) is latin1_swedish_ci. The Code The following query returns Abord â Plouffe using phpMyAdmin: SELECT C.NAME FROM CITY C WHERE C.REGION_ID=10 AND C.NAME_LOWERCASE LIKE '%abor%' ORDER BY C.NAME LIMIT 30 The following displays expected values (function is called db_fetch_all( $result )): while( $row = mysql_fetch_assoc( $result ) ) { foreach( $row as $value ) { echo $value . " "; $value = utf8_encode( $value ); echo $value . " "; } $r[] = $row; } The displayed values: 5482 5482 Abord â Plouffe Abord â Plouffe The array is then encoded using json_encode: $rows = db_fetch_all( $result ); echo json_encode( $rows ); Problem The web browser receives the following value: {"ID":"5482","NAME":null} Instead of: {"ID":"5482","NAME":"Abord â Plouffe"} (Or the encoded equivalent.) Question The documentation states that json_encode() works on UTF-8. I can see the values being encoded from LATIN1 to UTF-8. After the call to json_encode(), however, the value becomes null. How do I make json_encode() encode the UTF-8 values properly? One possible solution is to use the Zend Framework, but I'd rather not if it can be avoided.

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• Is it possible to mix MEF and Unity within a MEF-based plugin?

  - by Dave

  I'm finally diving into Unity head first, and have run into my first real problem. I've been gradually changing some things in my app from being MEF-resolved to Unity-resolved. Everything went fine on the application side, but then I realized that my plugins were not being loaded. I started to look into this issue, and I believe it's a case where MEF and Unity don't mix. Plugins are loaded by MEF, but each plugin needs to get access to the shared libraries in my application, like app preferences, logging, etc. Initially, my plugin constructor had the ImportingConstructor attribute. I then replaced it with InjectionConstructor so that Unity could resolve its shared library dependencies. But because I did that, MEF no longer loaded it! Then I used both attributes, which compiled, but then I got a composition error (MEF). I figured that this was because the constructor takes a parameter that was once resolved by a MEF Import, so I removed all parameters. As expected, now MEF was able to load my plugin, but because the constructor needs to call into the interface that was once passed in, construction fails. So now I'm at a point where I can get MEF to start to load my plugin, but can't do anything with it because the plugin relies on shared libraries that are registered with Unity. For those of you that have successfully mixed MEF and Unity, how do you go about resolving the references to the shared libraries with Unity?

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• How do I get the SharedPreferences from a PreferenceActivity in Android?

  - by Dave

  Hi, I am using a PreferenceActivity to show some settings for my application. I am inflating the settings via a xml file so that my onCreate (and complete class methods) looks like this: public class FooActivity extends PreferenceActivity { @Override public void onCreate(Bundle icicle) { super.onCreate(icicle); addPreferencesFromResource(R.xml.preference); } } The javadoc of PreferenceActivity states, that These preferences will automatically save to SharedPreferences as the user interacts with them. To retrieve an instance of SharedPreferences that the preference hierarchy in this activity will use, call getDefaultSharedPreferences(android.content.Context) with a context in the same package as this activity. But how I get the name of the SharedPreference in another Activity? I can only call getSharedPreferences(name, mode) in the other activity but I need the name of the SharedPreference which was used by the PreferenceActivity. What is the name or how can i retrieve it?

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