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• Beginner error in CUDA

  - by Dimitri

  Hi folks, first all i want to wish you a merry christmas. I am writing a small program in CUDA and i have the following errors : contraste.cu(167): error: calling a host function from a __device__/__global__ function is not allowed I don't understand why. Can you please help me and show me my errors. It seems that my program is correct. Here is a the bunch of code causing the problems : __global__ void kernel_contraste(float power, unsigned char tab_in[], unsigned char tab_out[], int nbl, int nbc) { int x = threadIdx.x; printf("I am the thread %d\n", x); } Part of my main program : unsigned char *dimg, *dimg_res; ..... cudaMalloc((void **)dimg, h * w * sizeof(char)); cudaMemcpy(dimg, r.data, h*w*sizeof(char), cudaMemcpyHostToDevice); cudaMalloc((void **)dimg_res, h*w*sizeof(char)); dim3 nbThreadparBloc(256); dim3 numblocs(1); kernel_contraste<<<numblocs, nbThreadparBloc >>>(puissance, dimg, dimg_res, h, w); cudaThreadSynchronize(); ..... cudaFree(dimg); cudaFree(dimg_res); The line 167 is the line where i call the printf in function kernel_contraste. For information, this program takes an image as an input( a sun Rasterfile ) and a power then it calculates the contraste of that image. Thanks !!

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• Lazy load images in UITableViewCell

  - by lostInTransit

  Hi I have some 50 custom cells in my UITableView. I want to display an image and a label in the cells where I get the images from URLs. I want to do a lazy load of images so the UI does not freeze up while the images are being loaded. I tried getting the images in separate threads but I have to load each image every time a cell becomes visible again (Otherwise reuse of cells shows old images) Apps like Facebook load images only for cells currently visible and once the images are loaded, they are not loaded again. Can someone please tell me how to duplicate this behavior. Thanks. Edit Trying to cache images in an NSMutableDictionary object creates problems when the user scrolls fast. I am getting images only when scrolling completely stops and clearing out the cache on memory warning. But the app invariably gets a memory warning (due to size of images being cached) and clears the cache before reloading. If scrolling is very fast, it crashes. Any other suggestions are welcome

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• Organizing development teams

  - by Patrick

  A long time ago, when my company was much smaller, dividing the development work over teams was quite easy: the 'application' team developed the applications-specific logic, often requiring a deep insight of specific industry problems) the 'generic' team developed the parts that were common/generic for all applications (user interface related stuff, database access, low-level Windows stuff, ...) Over the years the boundaries between the teams have become fuzzy: the 'application' teams often write application-specific functionality with a 'generic' part, so instead of asking the 'generic' team to write that part for them, they write it themselves to speed up the developments; then donate it to the 'generic' team the 'generic' team's focus seems to be more 'maintenance oriented'. All of the 'very generic' code has already been written, so no new developments are needed in it, but instead they continuously have to support all the functionality donated by the application teams. All this seems to indicate that it's not a good idea anymore to have this split in teams. Maybe the 'generic' team should evolve into a 'software quality' team (defining and guarding the rules for writing good quality software), or into a 'software deployment' team (defining how software should be deployed, installed, ...). How do you split up the work in different teams if you have different applications? everybody can write generic code and donates it to a central 'generic' team? everybody can write generic code, but nobody 'manages' this generic code (everybody is the owner) generic code is written by a 'generic' team only and the applications have to wait until the 'generic' team delivers the generic part (via a library, via a DLL) there is no overlap in code between the different applications some other way? Notice that thee advantage of having the mix (allowing everybody to write everywhere in the code) is that: code is written in a more flexible way it's easier to debug the code since you can easily step into the 'generic' code in the debugger But the big (and maybe only) disadvantage is that this generic code may become nobody's responsibility if there is no clear team that manages it anymore. What is your vision?

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• Configuring visual subversion to exclude

  - by douglasrahn

  I have been searching for any documentation on how to exclude files for visual svn but have not found any. All the documentation I find seems to not match my file structure or I am missing some files/directories referenced. For example the only file I find with configuration items in it seems to be completely commented out and missing the miscellaneous section as well as any auto properties enable - etc... Ultimately I need to exclude some files so that my development can continue without SVN errors. I am constantly receiving errors for pbuser and other project files and would like to make sure this is not causing some of my other headaches. Here is information I would love to use but cant as it doesnt match: How to “fix” Subversion in XCode 3 Posted on December 10, 2008 by Rodney Aiglstorfer in Xcode If you don’t take the necessary steps to prepare for subversion, you will run into problems using it in XCode. This is because XCode produces files that “confuse” Subversion because it either thinks they are text files when they are really binary files or the reverse. To overcome these limitations, you need to make some simple changes to the subversion configuration file in your user home directory. Here are some steps you can follow to ensure that you will be able to use Subversion within XCode without any issues. Step 1. Open the subversion configuration file ~/.subversion/config NOTE: If the “.subversion” directory doesn’t exist yet then run this command which fails but will create the necessary files to get you started: svn status Step 2. Enable “global-ignores” and add new things to ignore Find the line that contains the text “global-ignores” and append the following text: build *~.nib *.so *.pbxuser *.mode* *.perspective* What I am looking for really is how to exclude the files I know I need to for Visual subversion - it shouldnt be different really from regular svn as it claims to use the same product just places a gui on it.

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• Hide form if javascript disabled

  - by Kero

  I need to check on disabling JavaScript if the user disabled JavaScript from browser or firewall or any other place he will never show the form. I have lots of search and solutions, but unfortunately didn't got the right one. - Using style with no-script tag: This one could be broke with removing style... <noscript> <style type="text/css"> .HideClass { display:none; } </style> </noscript> The past code will work just fine but there is lots of problems in no-script tag as here Beside that i don't want to redirect user with no-script tag too...Beside that i can quickly stop loading the page to broke this meta or disable Meta tag from IE: <meta http-equiv="refresh" content="0; URL=Frm_JavaScriptDisable.aspx" /> Another way to redirect user with JavaScript but this will work let's say for 99% of users and this one isn't lovely way and will slow down the website... window.location="http://www.location.com/page.aspx"; Is there is any other ideas or suggestions to secure working with JavaScript...and prevent user from entering the website or see my form except when JavaScript enabled...

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• Random Loss of precision in Python ReadLine()

  - by jackyouldon

  Hi all, We have a process which takes a very large csv (1.6GB) and breaks it down into pieces (in this case 3). This runs nightly and normally doesn't give us any problems. When it ran last night, however, the first of the output files had lost precision on the numeric fields in the data. The active ingredient in the script are the lines: while lineCounter <= chunk: oOutFile.write(oInFile.readline()) lineCounter = lineCounter + 1 and the normal output might be something like StringField1; StringField2; StringField3; StringField4; 1000000; StringField5; 0.000054454 etc. On this one occasion and in this one output file the numeric fields were all output with 6 zeros at the end i.e. StringField1; StringField2; StringField3; StringField4; 1000000.000000; StringField5; 0.000000 We are using Python v2.6 (and don't want to upgrade unless we really have to) but we can't afford to lose this data. Does anyone have any idea why this might have happened? If the readline is doing some kind of implicit conversion is there a way to do a binary read, because we really just want this data to pass through untouched? It is very wierd to us that this only affected one of the output files generated by the same script, and when it was rerun the output was as expected. thanks Jack

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• This program isn't asking for the predetermined 5 numbers from the array?

  - by user1801781

  Okay, so this question is difficult to state. I'm a beginner at C++, and I rarely run into problems with these simple assignments, but something is majorly wrong here and I cannot identify it. I've been trying for hours. This program is supposed to read 5 numbers from an array that the user enters, and then print the largest one. (I know it's easier to just write a for-loop, but our professor wanted us to call a function). The only problem is that instead of asking for 5 numbers, it asks for 2. It works other than that, I JUST NEED IT TO ASK FOR 5 NUMBERS. haha. Your input would be greatly appreciated. I aspire to be a programmer one day, so don't be afraid to go harsh on me. #include <iostream> using namespace std; int largest_number(int score[], int max) { for (int i=1; i<5; i++) { cin >> score[i]; if(score[i] > max) max=score[i]; return (max); } } int main () { int score[5], max, z; cout << "Enter 5 numbers: " <<endl; cin >> score[0]; max = score[0]; z = largest_number(score, max); cout << "The largest number is: " << z <<endl; system("pause"); return 0; }

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• VB .NET Passing a Structure containing an array of String and an array of Integer into a C++ DLL

  - by DanJunior

  Hi everyone, I'm having problems with marshalling in VB .NET to C++, here's the code : In the C++ DLL : struct APP_PARAM { int numData; LPCSTR *text; int *values; }; int App::StartApp(APP_PARAM params) { for (int i = 0; i < numLines; i++) { OutputDebugString(params.text[i]); } } In VB .NET : <StructLayoutAttribute(LayoutKind.Sequential)> _ Public Structure APP_PARAM Public numData As Integer Public text As System.IntPtr Public values As System.IntPtr End Structure Declare Function StartApp Lib "AppSupport.dll" (ByVal params As APP_PARAM) As Integer Sub Main() Dim params As APP_PARAM params.numData = 3 Dim text As String() = {"A", "B", "C"} Dim textHandle As GCHandle = GCHandle.Alloc(text) params.text = GCHandle.ToIntPtr(textHandle) Dim values As Integer() = {10, 20, 30} Dim valuesHandle As GCHandle = GCHandle.Alloc(values) params.values = GCHandle.ToIntPtr(heightHandle) StartApp(params) textHandle.Free() valuesHandle.Free() End Sub I checked the C++ side, the output from the OutputDebugString is garbage, the text array contains random characters. What is the correct way to do this?? Thanks a lot...

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• Setting up GCALDaemon in Eclipse

  - by amadib

  Hello, my eventual goal is to be able to use the authentication and communication to a GMail inbox. In my attempt, I stumbled up on GCALDaemon and am trying to set it up as a project within eclipse. However, I am running into problems running the project from the included .launch files. I am receiving the following errors after running with -Dlog4j.debug on log4j: Trying to find [log4j.xml] using context classloader sun.misc.Launcher$AppClassLoader@1ba34f2. log4j: Trying to find [log4j.xml] using sun.misc.Launcher$AppClassLoader@1ba34f2 class loader. log4j: Trying to find [log4j.xml] using ClassLoader.getSystemResource(). log4j: Trying to find [log4j.properties] using context classloader sun.misc.Launcher$AppClassLoader@1ba34f2. log4j: Trying to find [log4j.properties] using sun.misc.Launcher$AppClassLoader@1ba34f2 class loader. log4j: Trying to find [log4j.properties] using ClassLoader.getSystemResource(). log4j: Could not find resource: [null]. log4j:WARN No appenders could be found for logger (org.gcaldaemon.core.Configurator). log4j:WARN Please initialize the log4j system properly. FATAL | Service terminated! Thanks.

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• why the exception is not caught?

  - by Álvaro García

  I have the following code: List<MyEntity> lstAllMyRecords = miDbContext.MyEntity.ToList<MyEntity>(); foreach MyEntity iterator in lstMainRecord) { tasks.Add( TaskEx.Run(() => { try { checkData(lstAllMyRecords.Where(n => n.IDReference == iterator.IDReference).ToList<MyEntity>()); } catch CustomRepository ex) { //handle my custom repository } catch (Exception) { throw; } }) ); }//foreach Task.WaitAll(tasks.ToArray()); I get all the records from my data base and in the foreach loop, I group all the records that have the same IDReference. Thenk I check if the data is correct with the method chekData. The checkData method throw a custom exception if something is wrong. I would like to catch this exception to handle it. But the problem is that with this code the exceptions are not caught and all seem to work without errors, but I know that this is not true. I try to check only one group of records that I know that has problems. If I check only one group of registrers, the loop is execute once and then only task is created. In this case the exception is caught, but if I have many groups, then any exception s thrwon. Why when I only have one task the exception is caught and with many groups are not? Thanks.

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• VB6 Game Development : Don't ask me why :-)

  - by CVS-2600Hertz-wordpress-com

  Hi All, I am developing a game in VB6 (plz don't ask me why :) ). The storyboard is ready and a rough implementation is underway. I am following a "pure-software-rendering" approach. (i.e. no DirectX, no openGL etc.) Amongst many others, the following "serious" problems exist: 2D alpha transparency reqd. to implement overlays. Parallax implementation to give depth-of-field illusion. Capturing mouse-scroll events globally (as in FPS-es; mapping them to changing weapon). Async sound play with absolute "zero-lag". Any ideas anyone. Please suggest any well documented library/ocx or sample-code. Plz do provide solutions with max performance and with as little overhead as possible. Also, anyone who has developed any games, and would be open to sharing her/his code would be highly appreciated. (any well-acknowledged VB games whose source-code i can study??) Thank You

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• Delete on a very deep tree

  - by Kathoz

  I am building a suffix trie (unfortunately, no time to properly implement a suffix tree) for a 10 character set. The strings I wish to parse are going to be rather long (up to 1M characters). The tree is constructed without any problems, however, I run into some when I try to free the memory after being done with it. In particularly, if I set up my constructor and destructor to be as such (where CNode.child is a pointer to an array of 10 pointers to other CNodes, and count is a simple unsigned int): CNode::CNode(){ count = 0; child = new CNode* [10]; memset(child, 0, sizeof(CNode*) * 10); } CNode::~CNode(){ for (int i=0; i<10; i++) delete child[i]; } I get a stack overflow when trying to delete the root node. I might be wrong, but I am fairly certain that this is due to too many destructor calls (each destructor calls up to 10 other destructors). I know this is suboptimal both space, and time-wise, however, this is supposed to be a quick-and-dirty solution to a the repeated substring problem. tl;dr: how would one go about freeing the memory occupied by a very deep tree? Thank you for your time.

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• When empty field comes, removed the row in the Grouped Table view in iPhone?

  - by Pugal Devan

  Hi friends, I have displayed the datas in grouped table view. The data's are displayed in the table view from XML parsing. I have 2 section of the table view, the section one has three rows and section two has two rows. section 1 -> 3 Rows section 2 - > 2 Rows. Now i want to check, if anyone of the string is empty then i should remove the empty cells, so i have faced some problems, if i have removed any empty cell, then it will changed the index number. So how can i check, anyone of the field is empty?, Because some times more number of empty field will come, so that the index position will be change. So please send me any sample code or link for that? How can i achieve this? Sample code, - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section { if (section == 0) { if([userEmail isEqualToString:@" "] || [phoneNumber isEqualToString:@" "] || [firstName isEqualToString:@" "]) { return 2; } else { return 3; } } if (section == 1) { if(![gradYear isEqualToString:@" "] || ![graduate isEqualToString:@" "]) { return 1; } else { return 2; } return 0; } Please Help me out!!! Thanks.

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• HTTP 401.3 when PUT, DELETE to ADO.NET Data Service (.svc)

  - by Nate

  I have an ADO.NET Data Service (we'll call it service.svc). When I deploy it to an IIS 6 site with Integrated Windows Authentication turned on, all requests (GET, POST, PUT, and DELETE) work fine for me, because I am an administrator on the box. However, when a non-admin user hits the service, only GET and POST requests work. When they try a PUT or DELETE request, they get an HTTP 401.3 "Access is Denied" error: "Error message 401.3: You do not have permission to view this directory or page using the credentials you supplied (access denied due to Access Control Lists). Ask the web server's administrator to give you access to '...\service.svc'." If I give the "Authenticated Users" local group write access to the .svc file, everything works as it should, but I really don't want to do this (and don't think I should have to do this to get this to work). In fact, I'm confused as to why changing the file permissions would affect this at all, but it definitely seems to be the problem. I've found a couple of different suggestions to fix somewhat similar problems in the Microsoft forums (Here, and I would post more links, but am being told that new users can only post one link in a post), but none of the solutions help. Any help is much appreciated. I am certainly no IIS expert, and this one has got me stumped.

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• Disable home button in android toddler app?

  - by cmerrell

  I've developed and app that is a slide show of pictures which each play a sound when you tap them. It's like a picture book for ages 2-4. The problem is, since android won't let you capture a home button press and essentially disable it, when parents give the phone to their child to play with unattended (brave parent), the child can inadvertenly exit the app and then make calls or otherwise tweak the phone. There are two other apps that currently have a psuedo fix for this issue. The apps are Toddler Lock and ToddlePhone. I've tried contacting the developers of these apps for some guidance but they haven't been willing to disclose anything, which if fine, but does anyone here have any suggestions? It looks like both of those other apps are acting like a home screen replacement app. When you enable the "childproof mode" on those apps the user is prompted to chose and app for the action and the choices are "Launcher, LauncherPro, etc." plus the toddler app. You then have to make the toddler app the default and voila, the phone is "locked" and can only be "unlocked" using a key combination or touching the four corners of the screen, etc. when you "unlock" the phone. your normal home screen app default restored. You don't even have to make the toddler app the default the next time you enable the "childproof mode". I have read that these two apps have problems with Samsung phones and they can cause an an infinite crash-and-restart-loop that requires a factory reset to fix. Obviously this is not the ideal solution to the problem but it looks like the only one availiable at this point. Does anyone have any ideas on how to implement a "childproof mode"?

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• "This program might not have installed correctly" message in Windows 7 RC

  - by kliu

  I have an installer that works perfectly under NT 5.x, Vista, and Windows 7. It contains the proper manifest for UAC on NT 6.x. But starting with Windows 7 RC, every time the setup program closes, Windows produces an erroneous "This program might not have installed correctly" message, even though the program did install correctly with no problems whatsoever. I never got these spurious messages in Vista or in Windows 7 beta. I sent a bug report to Microsoft, but have not heard back. I thought that this might just be a glitch in the Windows 7 RC, but the problem is still there on a fresh install of one of the very recent RTM-escrow builds that was leaked. Microsoft has no documentation whatsoever about this--not even a hint to what might possibly be triggering it. Even more frustrating is that I get this "This program might not have installed correctly" message even if I cancel the install on the very first are-you-sure-you-want-to-proceed screen before any of the installation code (creating a temp dir, extracting files, copying, registry, etc.) is ever run. Has anyone figured this one out?

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• Have a trouble with the function roots

  - by user3707462

  Hey guys I have multiple problems with using function 'roots'. I Have to find zeros of 's^1000 + 1'. I made Y = zeros(1,1000) then manually changed the 1000th matrice to '1'. but then 'root' function does not work with it ! Another problem is that I am having trouble with matrix multiplication. The question is finding zeros(roots) of (s^6 + 6*s^5 + 15*s^4 + 20*s^3 + 15*s^2 + 6*s +1)*(s^6 + 6s^5 + 15*s^4 +15*s^2 +6*s +1) so i did: a = [1 6 15 20 15 6 1] b = [1 6 15 0 15 6 1] y = a.*b; roots(y) but this gives me -27.9355 + 0.0000i -8.2158 + 0.0000i 0.1544 + 0.9880i 0.1544 - 0.9880i -0.1217 + 0.0000i -0.0358 + 0.0000i where I calculate the original equation with wolfram then I have made matrix as : p = [1 12 66 200 375 492 524 492 375 200 66 12 1] roots(p) and this gives me : -3.1629 + 2.5046i -3.1629 - 2.5046i 0.3572 + 0.9340i 0.3572 - 0.9340i -1.0051 + 0.0000i -1.0025 + 0.0044i -1.0025 - 0.0044i -0.9975 + 0.0044i -0.9975 - 0.0044i -0.9949 + 0.0000i -0.1943 + 0.1539i -0.1943 - 0.1539i and I think the second solution is right (that is what wolfram alpha gave me) How would you answer these two questions through matlab guys?

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• "render as JSON" is display JSON as text instead of returning it to AJAX call as expected

  - by typoknig

  I'm navigating to the index action of MyController. Some of the on the index page I'm making an AJAX call back to myAction in MyController. I expect myAction action to return some data as JSON to my AJAX call so I can do something with the data client side, but instead of returning the data as JSON like I want, the data is being displayed as text. Example of my Grails controller: class MyController { def index() { render( view: "myView" ) } def myAction { def mapOfStuff = [ "foo": "foo", "bar":] render mapOfStuff as JSON } } Example of my JavaScript: $( function() { function callMyAction() { $.ajax({ dataType: 'json', url: base_url + '/myController/myAction', success: function( data ) { $(function() { if( data.foo ) { alert( data.foo ); } if( data.bar ) { alert( data.bar ); } }); } }); } }); What I expect is that my page will render, then my JavaScript will be called, then two alerts will display. Instead the JSON array is displayed as text in my browser window: {"foo":"foo","bar":"bar"} At this point the last segment of the URL in my address bar is myAction and not index. Now if I manually enter the URL of the index page and press refresh, all works as expected. I have half a dozen AJAX calls I do the exact same way and none of them are having problems. What is the deal here? UPDATE: I have noticed something. When I set a break point in the index action of MyController and another one in the myAction action, the break point in myAction gets hit BEFORE the break point in index, even though I am navigating to the index. This is obviously closer to the root cause of my problem, but why is it happening?

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• My code is really slow in IE8. But in Safari,firefox,chrome it works great.

  - by bamic01

  Hello all, iam stuck now, i really hope if somebody can tell me the problems what i really don't see. The problem is is the menubar works great in Safari,FF,Chrome. But when i open IE8 its so slow when i put my mouse cursor on another menu area. Or better the entire menu is just so slow! html id & class are <div class="oe_wrapper"> <ul id="oe_menu" class="oe_menu"> this is my javascript code: $(function () { var $oe_menu = $('#oe_menu'); var $oe_menu_items = $oe_menu.children('li'); var $oe_overlay = $('#oe_overlay'); $oe_menu_items.bind('mouseenter', function () { var $this = $(this); $this.addClass('slided selected'); $this.children('div').css('z-index', '9999').stop(true, true).slideDown(300, function () { $oe_menu_items.not('.slided').children('div').hide(); $this.removeClass('slided'); }); }).bind('mouseleave', function () { var $this = $(this); $this.removeClass('selected').children('div').css('z-index', '1'); }); $oe_menu.bind('mouseenter', function () { var $this = $(this); $this.addClass('hovered'); }).bind('mouseleave', function () { var $this = $(this); $this.removeClass('hovered'); $oe_menu_items.children('div').hide(); }) });

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• C++: Case statement within while loop?

  - by Jason

  I just started C++ but have some prior knowledge to other languages (vb awhile back unfortunately), but have an odd predicament. I disliked using so many IF statements and wanted to use switch/cases as it seemed cleaner, and I wanted to get in the practice.. But.. Lets say I have the following scenario (theorietical code): while(1) { //Loop can be conditional or 1, I use it alot, for example in my game char something; std::cout << "Enter something\n -->"; std::cin >> something; //Switch to read "something" switch(something) { case 'a': cout << "You entered A, which is correct"; break; case 'b': cout << "..."; break; } } And that's my problem. Lets say I wanted to exit the WHILE loop, It'd require two break statements? This obviously looks wrong: case 'a': cout << "You entered A, which is correct"; break; break; So can I only do an IF statement on the 'a' to use break;? Am I missing something really simple? This would solve a lot of my problems that I have right now.

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• In maven2, how do I assemble bits and pieces of different modules to create final distributions?

  - by Carcassi

  I have four maven project: client api jar web service war ui jar web interface war The service war will need to be packaged to include the client api jar, together with javadocs (so that each version is distributed with a matching client and documentation). The web interface war will need the ui jar and all the dependencies (webstart/applet deployment). So I need a 5th project that does all the packaging. How to do this with ant or a script is perfectly clear to me, but not in maven. I tried the following: having the javadocs included as part of the war packaging: this requires the execution of the javadocs goal in project 1 before execution of package in project 2. Haven't found a way to bind plugins/goals across different projects. Using the assembly plugin in project2 had the same problem. create a fifth project and use the assembly plugin. Still the same problems as before, with the problem that since I need different pieces from each sub-project I do not understand how this can be done using the assembly. Is this too hard to do in maven, and should I just give up? Or I am looking at it wrong, in which case, how should I be looking at it? Thanks! Upon further reflection, here is a partial answer: Each project should build all its artifacts. This is done by having the plugins configured to run as per the prepare-resources and package phases. So, in my case, I prepare all that needs to be generated (jar, javadocs, xsd documentation, ...) as different artifacts so that a single "package" goal execution creates all. So, it's not "how project 2 forces project 1 to run different goals", but it's "make project 1 create all of its artifact as part as the normal lifecycle). This seems to simplify things.

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• Android Notepadv1 Tutorial - Persistent mNoteNumber?

  - by Chris L.

  So I did the Notepadv1 tutorial. It worked great. No problems. I would however like some explanation on why the mNoteNumber remembers the last number of the item I created. So the class starts as follows: public class Notepadv1 extends ListActivity { private int mNoteNumber = 1; That's fine, I understand that. The only other time the mNoteNumber variable is used is when you add an item it creates a note with that number and then increments it to the next number as follows: private void createNote() { String noteName = "Note " + mNoteNumber++; Those are the only two references to the variable mNoteNumber. When I press the Home button and then reopen the app, I add a new note but instead of adding a second "Note 1" it remembers that the last note I added as "Note 3" so it makes "Note 4". So I don't get it. Does Java/Android remember the last state of variables? If anyone could give me some explanation that would be great THANKS!

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• php memory how much is too much

  - by Rob

  I'm currently re-writing my site using my own framework (it's very simple and does exactly what I need, i've no need for something like Zend or Cake PHP). I've done alot of work in making sure everything is cached properly, caching pages in files so avoid sql queries and generally limiting the number of sql queries. Overall it looks like it's very speedy. The average time taken for the front page (taken over 100 times) is 0.046152 microseconds. But one thing i'm not sure about is whether i've done enough to reduce php memory usage. The only time i've ever encountered problems with it is when uploading large files. Using memory_get_peak_usage(TRUE), which I THINK returns the highest amount of memory used whilst the script has been running, the average (taken over 100 times) is 1572864 bytes. Is that good? I realise you don't know what it is i'm doing (it's rather simple, get the 10 latest articles, the comment count for each, get the user controls, popular tags in the sidebar etc). But would you be at all worried with a script using that sort of memory getting hit 50,000 times a day? Or once every second at peak times? I realise that this is a very open ended question. Hopefully you can understand that it's a bit of a stab in the dark and i'm really just looking for some re-assurance that it's not going to die horribly come re-launch day.

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• Starting a personal reuasable code repository.

  - by Rob Stevenson-Leggett

  Hi, I've been meaning to start a library of reusable code snippets for a while and never seem to get round to it. At the moment I just tend to have some transient classes/files that I drag out of old projects. I think my main problems are: Where to start. What structure should my repository take? Should it be a compiled library (where appropriate) or just classes/files I can drop into any project? Or a library project that can be included? What are the licencing implications of that? In my experience, a built/minified library will quickly become out of date and the source will get lost. So I'm leaning towards source that I can export from SVN and include in any project. Intellectual property. I am employeed, so a lot of the code I write is not my IP. How can I ensure that I don't give my own IP away using it on projects in work and at home? I'm thinking the best way would be to licence my library with an open source licence and make sure I only add to it in my own time using my own equipment and therefore making sure that if I use it in a work project the same rules apply as if I was using a third party library. I write in many different languages and often would require two or more parts of this library. Should I look at implementing a few template projects and a core project for each of my chosen reusable components and languages? Has anyone else got this sort of library and how do you organise and update it?

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• Select All in Javascript (Firefox extension) not working right

  - by leezer3

  I'm having some problems with a select all/ none function. (I didn't write it, I'm trying to fix it!) It currently looks like this: rsfindmod.SelAll = function(){ document.getElementById("ListBox").selectAll(); document.getElementById("ListBox").focus(); } It's being used on a dynamically generated set of links, so there's no set number of items in this listbox. This seems to work most of the time, but randomly it only selects those which are visible at the time. Scrolling the list or hitting the button again seems to normally make it work as expected. My first (Obvious?) thought was to replace the function entirely with the one from this link for testing: http://viralpatel.net/blogs/2009/06/listbox-select-all-move-left-right-up-down-javascript.html Trouble is that I can't get this one to work whatsoever! This gives me the error that listbox.options is not defined Any thoughts please? I'm by no means certain whether it's the original function at fault, or something in the generation of this listbox.

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