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• How to make scrolling through images as fast as Apple's Photos app

  - by clozach

  The Goal — On an iPhone, to browse through several hundred locally-stored jpgs using a UIScrollView. The Problem — Like many others before me, I've tried implementing a scroll view based on Apple's Page Control sample code and found it lacking. The biggest issue I'm currently up against is that the sample code's architecture doesn't seem to scale. With just a few images loaded from disk, everything's fine. Once the number of images gets into the dozens, though, scrolling suffers terribly: the scrollview stutters mid-scroll with each new swipe. The only code I've toyed with that comes even close to being reasonably responsive is Three20, but even there the performance doesn't hold a candle to Photos. For now, I'm just using Three20, but a faster, custom solution would definitely be preferable.

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• How to make use of c++ xpcom component from javascript xpcom component.

  - by Prashant

  I have developed a xpcom component using c++. I have GetHWND() method in my component. I have also developed another xpcom component using javascript. I want to make use of GetHWND function in javascript xpcom component. I am using following code to do so. netscape.security.PrivilegeManager.enablePrivilege("UniversalBrowserRead"); netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect"); var myComponent = Components.classes['@dougt/WebLock'].createInstance(Components.interfaces.IWebLock); myComponent = myComponent.QueryInterface(Components.interfaces.IWebLock); var res = myComponent.GetHWND(mainWindow.content.document); But it is giving error as "ReferenceError: netscape is not defined". I did google search but did not find the solution to it. I am using Mozilla Firefox and I want it to get worked for the same. Please help me to come out of this problem. Thanks in advance.

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• Open Source alternative to lablife

  - by Yauhen Yakimovich

  I am looking for an Open Source alternative to SAAS provided by lablife.org website. Main purpose of the service is to automate daily tasks for life science laboratory. This service was free and nice to use, but when the original company developing this service was bought by BioData they kind of decided to kill and replace it with a new service called labguru. Apparently, a new service has a lot of functionality missing or just bad. That's why I am on a search for an alternative solution. So if you are familiar with what this software does - and if there are any known alternatives, I would be very grateful for any of your tips.

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• How To Make Moving News Bar in Windows Forms Application without Timer

  - by Ehab Sutan

  I'm making a desktop application in C# which contains a moving News Bar labels. I'm using a timer to move these labels but the problem is that when i make the interval of this timer low (1-10 for example) the application takes very high percentage of CPU Usage, And when i make it higher(200 -500 ) the movement of the labels becomes intermittent or not smooth movement even that the user may not be able to read the news in Comfortable way. ((More Information)) it is Windows form application. the way i move the labels is as follows : the news items from RSS feeds are represented in a group of linklabels. All these linklabels are added to a flowlayout container. The timer moves the whole flowlayout container. I found this way according to my knowledge the best way to making the news bar. If you have better idea or solution please help

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• Retrieving values from WSDL before making a request

  - by Egor

  I'm very new to working with web services and I'm trying to understand the basics of it in Android using the ksoap2 library. Here's the question: this is the WSDL file of a service I'm using. It's a service that converts values between different units. The units are stated in the WSDL. Now, is there any way to read those units and, say, populate a Spinner to let users choose the units they want to work with? A code solution will be highly appreciated. Thanks in advance.

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• problem burning DVD using IMAPI2 in Windows XP using c#.net..

  - by zoya

  i have used IMAPI2 for buring CD/DVD in windows XP..but it is giving me unhandeled exception...it is written as:- System.InvalidCastException: Unable to cast COM object of type 'IMAPI2.Interop.MsftFileSystemImageClass' to interface type 'IMAPI2.Interop.MsftFileSystemImage'. This operation failed because the QueryInterface call on the COM component for the interface with IID '{7CFF842C-7E97-4807-8304-910DD8F7C051}' failed due to the following error: No such interface supported (Exception from HRESULT: 0x80004002 (E_NOINTERFACE)) can anyone plz help me out to solve this pbm.. i have updated the XP storage 1.0 as written in the code project.. but still im not able to solve this error.. this project is working fine in Vista and Windows7 but unable to work with XP.. is there any solution to burn DVD in XP by using IMAPI or any other component..??? i have taken the sample code from http://www.codeproject.com/KB/miscctrl/imapi2.aspx

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• Write a function that returns the longest palindrome in a given string. e.g "ccddcc" in the string "

  - by Learner

  I thought of a solution but it runs in O(n^2) time Algo 1: Steps: Its a brute force method Have 2 for loops for i = 1 to i less than array.length -1 for j=i+1 to j less than array.length This way you can get substring of every possible combination from the array Have a palindrome function which checks if a string is palindrome so for every substring (i,j) call this function, if it is a palindrome store it in a string variable If you find next palindrome substring and if it is greater than the current one, replace it with current one. Finally your string variable will have the answer Issues: 1. This algo runs in O(n^2) time. Algo 2: Reverse the string and store it in diferent array Now find the largest matching substring between both the array But this too runs in O(n^2) time Can you guys think of an algo which runs in a better time. If possible O(n) time

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• how to target css to iPad but exclude Safari 4 desktop using a media query?

  - by miriam835work

  I am trying to use a media rule to target css to iPad only. I want to exclude iPhone/iPod and desktop browsers. I would like to to also exclude other mobile devices if possible. I have used <style type="text/css" media="only screen and (min-device-width: 768px) and (max-device-width: 1024px)"> but just found out that desktop Safari 4 reads it. I have tried variations with "481px" instead of "768px" and another that adds an orientation to that: <style type="text/css" media="only screen and (min-device-width: 481px) and (max-device-width: 1024px) and (orientation:portrait)"> but not luck. (Later we will be sniffing user-agent strings for iPad, but for now that solution won't work.) Thanks!

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• Any experience on Sitecore CMS using Windows Sharepoint Services?

  - by Marcin B

  Hi guys, I plan to develop a solution based on Sitecore CMS which would allow the client company to manage their documents in a Sharepoint-fashion (versioning, diffs??). Of course, we're after limiting the number of licences required for the project, and the client doesn't yet have licences for MOSS, so we couldn't simply use the Sitecore Sharepoint Connector which from everything I read requires the MOSS installation, and won't work with bare WSS. From what I know Sitecore CMS doesn't version documents as such, but is there a possibility for a workaround? Ideally we'd work with Documents and Files in the same fashion as with normal pages, which enables DIFFs and stuff. Any ideas? Thanks, Marcin B

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• LINQ to SQL repository - caching data

  - by creativeincode

  I have built my first MVC solution and used the repository pattern for retrieving/inserting/updating my database. I am now in the process of refactoring and I've noticed that a lot of (in fact all) the methods within my repository are hitting the database everytime. This seems overkill and what I'd ideally like is to do is 'cache' the main data object e.g. 'GetAllAdverts' from the database and to then query against this cached object for things like 'FindAdvert(id), AddAdvert(), DeleteAdvert() etc..' I'd also need to consider updating/deleting/adding records to this cache object and the database. What is the best apporoach for something like this? My knowledge of this type of things is minimal and really looking for advice/guidance/tutorial to point me in the right direction. Thanks in advance.

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• MouseLeftButtonDown not recognized by a ListBox ??

  - by Flo

  Hello everybody, I'm encountering a huge problem, I have tried everything I could, but I didn't find any solution. I have a listBox, with a DataTemplate. I want to use the events MouseLeftButtonDown and MouseLeftButtonUp to check the item selected is the same the user clicked on. The problem is the event MouseLeftButtonUp is recognized but not the event MouseLeftButtonDown. Part of my XAML code : < ListBox Grid.Row="1" MouseLeftButtonDown="listBox_Faits_MouseLeftButtonDown" MouseLeftButtonUp="listBox_Faits_MouseLeftButtonUp" The code behind : private void listBox_Faits_MouseLeftButtonUp(object sender, MouseEventArgs e) { ... } private void listBox_Faits_MouseLeftButtonDown(object sender, MouseEventArgs e) { ... } Is anyone know why ? Thanks you, Regards, Flo

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• Minimizing the number of boxes that cover a given set of intervals

  - by fortran

  Hi, this is a question for the algorithms gurus out there :-) Let S be a set of intervals of the natural numbers that might overlap and b a box size. Assume that for each interval, the range is strictly less than b. I want to find the minimum set of intervals of size b (let's call it M) so all the intervals in S are contained in the intervals of M. Trivial example: S = {[1..4], [2..7], [3..5], [8..15], [9..13]} b = 10 M = {[1..10], [8..18]} // so ([1..4], [2..7], [3..5]) are inside [1..10] and ([8..15], [9..13]) are inside [8..18] I think a greedy algorithm might not work always, so if anybody knows of a solution of this problem (or a similar one that can be converted into), that would be great. Thanks!

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• Changing timezone without changing time in Java

  - by Martin

  Hi! I'm receiving a datetime from a SOAP webservice without timzone information. Hence, the Axis deserializer assumes UTC. However, the datetime really is in Sydney time. I've solved the problem by substracting the timezone offset: Calendar trade_date = trade.getTradeDateTime(); TimeZone est_tz = TimeZone.getTimeZone("Australia/Sydney"); long millis = trade_date.getTimeInMillis() - est_tz.getRawOffset(); trade_date.setTimeZone( est_tz ); trade_date.setTimeInMillis( millis ); However, I'm not sure if this solution also takes daylight saving into account. I think it should, because all operations are on UTC time. Any experiences with manipulating time in Java? Better ideas on how to solve this problem?

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• How do I watch a file for changes using Python?

  - by Jon Cage

  I have a log file being written by another process which I want to watch for changes. Each time a change occurrs I'd like to read the new data in to do some processing on it. What's the best way to do this? I was hoping there'd be some sort of hook from the PyWin32 library. I've found the win32file.FindNextChangeNotification function but have no idea how to ask it to watch a specific file. If anyone's done anything like this I'd be really grateful to hear how... [Edit] I should have mentioned that I was after a solution that doesn't require polling. [Edit] Curses! It seems this doesn't work over a mapped network drive. I'm guessing windows doesn't 'hear' any updates to the file the way it does on a local disk.

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• Visual Studio 2008 - formatting/control characters/marks

  - by AL

  Hi, I don't know what I did but somehow the IDE has started displaying a green dot whenever I press spacebar and a green arrowhead whenever I press TAB. The source has become littered with these characters all over and I am finding it very difficult to code in the presence of so many formatting marks. I have tried to search a solution on Google but couldn't perhaps enter the right keywords so haven't been able to fix the behavior. Is there any way I can stop VS2008 IDE from littering my source code with these green dots and arrowheads whenever I press spacebar/tab? I would be really thankful for this help. Thanks, -AL PS: Re-posting the question as I am new to this forum and probably couldn't see the email notification option earlier. My apologies for this inconvenience.

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• Can I specify which VCS module or adaptor is used by a Luntbuild buiulder or schedule?

  - by pkaeding

  I have luntbuild set up and working great for my project, with several different builder schedules running on trunk. Now, I just created a branch, and I want to add at least one schedule (and corresponding builder, if necessary) to build that branch (I want the branch built separately from trunk). Is this possible? Some others in my company have just created separate projects in Luntbuild for their branches, but I feel like that might not be the ideal solution. So, to reiterate, I want to build this branch continuously. If I just add a second module to the current setup, it tries to build both trunk and the branch together. I want them build separately. Thanks for any insight! EDIT: The bounty is about to end, and still no answers. I have worked around the original problem by creating a new project in LB, but I feel like there must be a better way.

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• how to open multiple projects into the CAST IRON integration tool?

  - by Mishal

  Hi, I am learning the cast iron tool which is widely used now a days for integration purpose,but i can only open 1 project and if i want to open the other project at the same time than i have to close the 1st project and open the 2nd project. So many times i need to have to open the 2 projects at the same time but i dont know in which way i can open the projects ? can any body give me any urgent solution for the same to open the multiple projects at the same time and to switch between them ? Thanks, Mishal Shah

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• MySQL: updating a row and deleting the original in case it becomes a duplicate

  - by Silvio Donnini

  I have a simple table made up of two columns: col_A and col_B. The primary key is defined over both. I need to update some rows and assign to col_A values that may generate duplicates, for example: UPDATE `table` SET `col_A` = 66 WHERE `col_B` = 70 This statement sometimes yields a duplicate key error. I don't want to simply ignore the error with UPDATE IGNORE, because then the rows that generate the error would remain unchanged. Instead, I want them to be deleted when they would conflict with another row after they have been updated I'd like to write something like: UPDATE `table` SET `col_A` = 66 WHERE `col_B` = 70 ON DUPLICATE KEY REPLACE which unfortunately isn't legal in SQL, so I need help finding another way around. Also, I'm using PHP and could consider a hybrid solution (i.e. part query part php code), but keep in mind that I have to perform this updating operation many millions of times. thanks for your attention, Silvio Reminder: UPDATE's syntax has problems with joins with the same table that is being updated

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• Target .NET 3.5 C++/CLI in Visual Studio 2010 Beta 2

  - by jeffora

  Has anyone had any success converting a VS 2008 C++/CLI (vcproj) project to a VS 2010 project (vcxproj), whilst maintaining .NET 3.5 as the target framework? I haven't been able to do this and get the project to build successfully. The project compiles fine in VS2008 as .NET 3.5, and fine in VS2010 as .NET 4.0, but I am unable to target .NET 3.5 in 2010. The IDE doesn't seem to provide an option for it, and modifying the vcxproj file by adding <TargetFrameworkVersion>v3.5</TargetFrameworkVersion> causes compilation to fail with the folling error: Error 1 error C1001: An internal error has occurred in the compiler. According to this link, there is apparently some differences in compilers used between VS2008 and 2010, but manually editing the project file was still suggested as a solution. Does anyone have any idea on this?

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• Mercurial setup: One central repo or several?

  - by Robert S.

  My company is switching from Subversion to Mercurial. We're using .NET for our product. We have a solution with about a dozen projects that are separate modules with no dependencies on each other. We're using a central repo on a server with push/pull for our integration build. I'm trying to figure out if I should create one central repo with all the projects in it, or if I should create a separate repo for each project. One argument for separate repos is that branching the individual modules would be easier, but an argument for a single repo is easier management and workflow. I'm very new to hg and DVCS, so some guidance is greatly appreciated.

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• Navigation bar not displayed if Tabbar used in a view

  - by iPhoneDev

  Hello, My App is Navigation based template. Only one view requires Tab Bar. So I programmatically add a UITabBar in view as: tbc = [[UITabBarController alloc] initWithNibName:nil bundle:nil]; tbc.viewControllers = [NSArray arrayWithObjects:blueController, redController, nil]; tbc.selectedViewController = redController; [self presentModalViewController:tbc animated:YES]; But I am unable to get "Navigation Bar" at top in this view. Can any one help to know how I can have Tabs in bottom and navigation bar in top. Please help it I am not able to find the solution.

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• Same query, different execution plans

  - by A..

  Hi, I am trying to find a solution for a problem that is driving me mad... I have a query which runs very fast in a QA Server but it is very slow in production. I realised that they have different execution plans... so I have try recompiling, cleanning the cache for the execution plans, update statistics, check the type of collation... but I still can't find what's going on... The databases where the query is running are exactly the same and the SQL Servers have also the same configuration. Any new ideas would be much appreciated. Thanks, A.

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• How to re-use a thread in Java ?

  - by David

  I am a building a console Sudoku Solver where the main objective is raw speed. I now have a ManagerThread that starts WorkerThreads to compute the neibhbors of each cell. So one WorkerThread is started for each cell right now. How can I re-use an existing thread that has completed its work? The Thread Pool Pattern seems to be the solution, but I don't understand what to do to prevent the thread from dying once its job has been completed. ps : I do not expect to gain much performance for this particular task, just want to experiment how multi-threading works before applying it to the more complex parts of the code. Thanks

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• Implementing a configurable factory

  - by Decko

  I'm having difficulties finding out how to implement a 'configurable' behavior in a factory class in PHP. I've got at class, which takes another class as an argument in its constructor. The argument class could take a number of arguments in its constructor. An instance of my main class could look something like this $instance = new MyClass(new OtherClass(20, true)); $instance2 = new MyClass(new DifferentClass('test')); This is rather clumsy and has a number of problems and therefore I would like to move this into a factory class. The problem is that this factory somehow needs to know how to instantiate the argument class, as this class can have any number of arguments in the constructor. Preferably I would like to be able to do something like this $instance = Factory::build('OtherClass'); $instance2 = Factory::build('DifferentClass'); And let the factory retrieve the arguments from a configuration array or similar. Is there a proper solution to this problem?

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• How to copy from C# control and paste link into excel.

  - by Steve H.

  I have an application that I want to link to excel. I have no preference which control is used as long as I can copy the data or control, and paste link into excel. When the data changes in my application, I want the cell to change in excel. I have a client that claims it is possible and he has seen it, but has no proof and may be confused. I have searched the internet and have come up with a number of half-solutions, and people who want the opposite of what I want. Does anyone know the full solution?

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