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• iPhone image distortion

  - by Corey Floyd

  Are there any reasons why the simulator will display UIImageViews properly, but incorrectly on the iPhone? My Process: An image in a PNG file Start a UIGraphicsBeginImageContext() Draw the PNG in a CGrect Draw text in the CGRect Create an UIImage from the context Set the image of a UIImaveView to the UIImage Set the frame of the UIImageView to the size of the PNG Add as a subview Outcome: The image does not display correctly. The rightmost 1-3 pixels of the image is just a vertical white line. This occurs only on the device and not on the simulator. I can fix the problem, but only by increasing the size of the UIImageView. If I increase the size.height of the UIImageView by 1 pixel, it displays the UIImage correctly. Of course, these leaves the iPhone to scale my image before drawing it on screen which is not desirable. Any ideas why this occurs or any fixes for it? (I will post my code if needed)

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• loading multiple .mat files in MATLAB

  - by smilingbuddha

  I have 110 files named time1.mat, time2.mat ..., time110.mat. I want to load these matrices into the MATLAB workspace. I have always used load -'ASCII' matrix.mat to load an ASCII matrix file in the current folder. So I tried doing for i=1:10 filename=strcat('time',int2str(i),'.mat'); load -'ASCII' filename end But I am getting a MATLAB error as ??? Error using ==> load Unable to read file filename: No such file or directory. ? Of course the string filename seems to be evaluated correctly by MATLAB as time1.mat. in the first iteration where it crashes at the load line. Any suggestions how I should do this?

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• Generating Javascript from PHP?

  - by Aristotle

  Are there any libraries or tools specifically designed to help PHP programmers write Javascript? Essentially, converting the PHP logic into Javascript logic. For instance: $document = new Document($html); $myFoo = $document->getElementById("foo"); $myFoo->value = "Hello World"; Being converted into the following output: var myFoo = document.getElementById("foo"); myFoo.value = "Hello World"; Of course it would be excellent if more complicated solutions could be derived too, perhaps converting objects and internal methods into javascript-objects, etc.

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• Guessing the time zone from an arbitrary "location" string?

  - by Thomas

  I'm trying to run some statistics over the Stack Overflow data dump, and for that I would like to know the time zone for each user. However, all I have to go on is the completely free-form "location" string. I'll stress that I'm only looking for an approximation of the time zone; of course, in general this is an unsolvable problem. However, many people fill out their country, state and/or city, which should give a pretty good indication. It's okay if it fails for other cases. It doesn't have to be reliable, it doesn't have to be accurate, it doesn't have to cover all bases. I don't want to waste too much time on this, so I'm wondering if there is some code out there that can make a reasonable guess. Any language, platform, API or library goes. Any ideas?

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• Switch to 64 bit or stay at 32 bit?

  - by Johnny

  I have a small office, and I currently use a Visual Foxpro Application that I wrote to handle all the data. It is time to buy a new server. It seems that there are problems with VFP and 64 bit operating system. Should I make the move to 64 bit and try to deal with the problems that arise, or buy a new server running the older 32 bit acrhitecture? The latter would of course require that I use Exchange 2003 instead of 2007 or 2008. Probably no big deal?

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• Spinlocks, How Much Useful Are They?

  - by unknown

  How often do you find yourself actually using spinlocks in your code? How common is it to come across a situation where using a busy loop actually outperforms the usage of locks? Personally, when I write some sort of code that requires thread safety, I tend to benchmark it with different synchronization primitives, and as far as it goes, it seems like using locks gives better performance than using spinlocks. No matter for how little time I actually hold the lock, the amount of contention I receive when using spinlocks is far greater than the amount I get from using locks (of course, I run my tests on a multiprocessor machine). I realize that it's more likely to come across a spinlock in "low-level" code, but I'm interested to know whether you find it useful in even a more high-level kind of programming?

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• How to create widget with clickable text in QT/PyQt?

  - by serge

  Hi everyone, i'm trying to realize non-editable QTableView with widgets in cells that should contain clickable listed text. With following code i'm setting widget in definite cell: view = QTableView() label = QLabel( <some html text> ) ... view.setIndexWidget(index, label) I used html to make label's text clickable, but links became blue with underline and moreover by clicking on it with right mouse button appears popup menu with "Copy Link Locaion" option, where i wanted to place some hidden information instead of url and of course do not let user see this info. I'm looking for light-weight widget, i thought that insertion of QGraphicsView in each cell will lead to big computer loads, but can't think of any other solution. Can you advice what should i use for this purpose? Thank you in advance Serge

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• How get file names using OpenFileDialog in .NET (1000+ file multiselect)

  - by Cole

  Maybe some of you have come across this before.... I am opening files for parsing. I'm using OpenFileDialog, of course, but i'm limited to a buffer of 2048 on the .FileNames string. Thus, I can only select a few hundred files. This is OK for most cases. However, fore example, I have in one case 1400 files to open. Do you know a way to do this with the open file dialog. I just want the string array of .FileNames, I pass that to parser class. I was also thinking of offering a FolderBrowserDialog option and then I'd use some other method to just loop through all the files in a directory, like the DirectoryInfo class. I'd do this as a last resort if I can't have an all in one solution.

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• Comet implementation for ASP.NET?

  - by Hitchhiker

  I've been looking at ways to implement gmail-like messaging inside a browser, and arrived at the Comet concept. However, I haven't been able to find a good .NET implementation that allows me to do this within IIS (our application is written in ASP.NET 2.0). The solutions I found (or could think of, for that matter) require leaving a running thread per user - so that it could return a response to him once he gets a message. This doesn't scale at all, of course. So my question is - do you know of an ASP.NET implementation for Comet that works in a different way? Is that even possible with IIS?

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• Python: Split by 1 or more occurrences of a delimiter

  - by Adam Matan

  Hi, I have a formatted string from a log file, which looks like: >>> a="test result" That is, the test and the result are split by some spaces - it was probably created using formatted string which gave test some constant spacing. Simple splitting won't do the trick: >>> a.split(" ") ['test', '', '', '', ... '', '', '', '', '', '', '', '', '', '', '', 'result'] split(DELIMITER, COUNT) cleared some unnecessary values: >>> a.split(" ",1) ['test', ' result'] This helped - but of course, I really need: ['test', 'result'] I can use split() followed by map + strip(), but I wondered if there is a more Pythonic way to do it. Thanks, Adam

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• Bypassing rack version error using Rails 2.3.5

  - by Matt

  I'm currently on Dreamhost attempting to run a Rails 2.3.5 app. Here is the situation, Dreamhost's servers have Rails 2.2.2 installed. Of course, I can't update a shared host's rails version, so I froze my Rails in vendor. Rails 2.3.5 requires the rack v1.0.1 gem. Dreamhost uses the rack v1.0.0 gem. So when I try to define: config.gem "rack", :version => "1.0.1" I get: can't activate rack (~> 1.0.1, runtime) for [], already activated rack-1.0.0 for [] So what I really need to do is bypass my app's request to use 1.0.1, and use Dreamhost's 1.0.0. Does anyone know how to configure this? Is it even possible? Thanks for the help.

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• How to recognize touch events and control a script object inside UIWebView?

  - by Markus S.

  Situation: I have an UIView with an UIWebView in it. When the viewDidLoad the Javascript Object inside the UIWebView is called (Microsoft Seadragon AJAX JS). For your Understanding: Seadragon loads a specified megapixel image(JPEG) and in a Desktop Browser like Firefox i can Zoom into the image and I can drag the crop for example from the middle to the left. In the iPhone Simulator (for iPad) only the Zooming Function is working on one single tap but when i try to drag the crop (with left mouse button click and holding it) I'm dragging the whole UIWebView but not the crop of course! Is that feature which the simulator isn't able to handle or what's yout solutin guys? Special Thanks!! P.S.: It's a bit jiggling when the zooming function of Seadragon is called. Is that authentic to the real performance of the iPad or does the simulator not have the power as the iPad has?

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• Why is J2ee/EJBs a dying Trend?

  - by Taranfx

  I might be wrong on this, but I no longer see heavy Business and Web services being hosted using J2ee technologies (Especially EJBs). Having known the power and scalability of J2ee applications, what is keeping developers/decision makers to restrict themselves to Core Java (POJOs) or even other web technologies like PHP, python. Is it the development time? Is it the Ease of configuration? (I feel this should not be a strong reason with Java EE 6, things are simplified) Of course scripting languages are faster to develop, we cannot ignore the fact that they are inherently not-as-scalable as Java Applications are (using App servers)

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• 3D Character/Model Creator

  - by Click Ok

  I'm in a project to create a 3d game using XNA/C#, and the game will use a lot of 3d characters. Looking at the current 3d games, in some they create near to hundreds of characters, what lead me to think that there are some good 3d character/model creator. To narrow the sample, the game will have characters like the game "Grand Chase". There are some good (and easy) character model creator for to use in XNA development? Free is better, of course, but I will get payed versions too. EDIT: Another question is about the movements of the characters. The movements like walk, jump, sit, etc are "created" by the "character creator tool" or by the game?

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• What is a good pattern for binding a collection of objects coming from WCF, in Silverlight?

  - by Krishna

  Hi there, I've got a question about a Silverlight WCF Databinding pattern: There are many examples about how to bind data using {Binding} expressions in XAML, how to make async calls to a WCF service, set the DataContext property of a element in the UI, how to use ObservableCollections and INotifyPropertyChanged, INotifyCollectionChanged and so on. Background: I'm using the MVVM pattern, and have a Silverlight ItemsControl, whose ItemsSource is set to an ObservableCollection property on my ViewModel object. My view is of course the XAML which has the {Binding}. Say the model object is called 'Metric'. My ViewModel periodically makes calls to a WCF service that returns ObservableCollection. MetricInfo is the data transfer object (DTO). My question is two-fold: Is there any way to avoid copying each property of MetricInfo to the model class - Metric? When the WCF calls completes, is there any way to make sure I sync the items which are in both my local ObservableCollection and the result of the WCF call - without having to first clear out all the items in the local collection and then add all the ones from the WCF call result? thanks, Krishna

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• UITabBarController With UINavigationController "more" Tab Issue

  - by Medlay

  UITabBarController with UINavigationController "more" tab issue There is a problem with using UINavigationController in UITabBarController. I have a TabBar  with 6 items. Of course, a standart item "more" appears, and there are two UINavigationControllers that didn't fit in a TabBar. The core of the problem is: when I'm working with visible items (a first four), UIViewController can be pushed  in an UINavigationController: [self.navigationController pushViewController:userDataViewController animated:YES]; If you call on in "more" and rearrange items in such way, that a visible UINavigationController gets into "more", when calling on it userDataViewController appears.  This  userDataViewController is the last, which has got in a stack and a Back button leads back to "more", but not to the controllers, that were before a userDataViewController appeared. I understand that in fact a selector pushViewController is called from "more", and it pushes my UINavigationController in a stack, and it's not good. Maybe, someone has faced such problem and could help me to solve it? Thank you forward.

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• In a multithreaded app, would a multi-core or multiprocessor arrangement be better?

  - by Michael

  I've read a lot on this topic already both here (e.g., stackoverflow.com/questions/1713554/threads-processes-vs-multithreading-multi-core-multiprocessor-how-they-are or http://stackoverflow.com/questions/680684/multi-cpu-multi-core-and-hyper-thread) and elsewhere (e.g., ixbtlabs.com/articles2/cpu/rmmt-l2-cache.html or software.intel.com/en-us/articles/multi-core-introduction/), but I still am not sure about a couple things that seem very straightforward. So I thought I'd just ask. (1) Is a multi-core processor in which each core has dedicated cache effectively the same as a multiprocessor system (balanced of course for processor speed, cache size, and so on)? (2) Let's say I have some images to analyze (i.e., computer vision), and I have these images loaded into RAM. My app spawns a thread for each image that needs to be analyzed. Will this app on a shared cache multi-core processor run slower than on a dedicated cache multi-core processor, and would the latter run at the same speed as on an equivalent single-core multiprocessor machine? Thank you for the help!

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• How to turn on Mercurial in existing Eclipse project ?

  - by Rabarberski

  I've installed the HgEclipse plugin for Mercurial integration in Eclipse. I have an existing (Java) project in Eclipse, but I can't figure out how to turn on mercurial change tracking for this existing project. It seems I can do an import of a mercurial project (File Import Mercurial Clone ...), but that's only for new Eclipse projects... Of course, I can apply Mercurial via the command line, e.g. hg init in the project directory, but this doesn't get picked up in Eclipse. So, how do I turn on Mercurial for existing Eclipse projects?

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• How to find unneccesary dependencies in a maven multi-project?

  - by hstoerr

  If you are developing a large evolving multi module maven project it seems inevitable that there are some dependencies given in the poms that are unneccesary, since they are transitively included by other dependencies. For example this happens if you have a module A that originally includes C. Later you refactor and have A depend on a module B which in turn depends on C. If you are not careful enough you'll wind up with both B and C in A's dependency list. But of course you do not need to put C into A's pom, since it is included transitively, anyway. Is there tool to find such unneccesary dependencies? (These dependencies do not actually hurt, but they might obscure your actual module structure and having less stuff in the pom is usually better. :-)

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• Troubleshooting source of heavy resource-usage on a server 2008 running multiple sites

  - by batman_man

  Hi, I am running about 10 asp.net websites on a hosted virtual server. The server runs Server 2008 - each website is backed by its own database running on SQL server 2008 on the same box. Lately the box has seemed really slow. The only kind of discovery i could think of doing was looking in the task manager, where i can see w3wp and sqlserver.exe jumping to 40% cpu usage every 5-10 seconds. What are the steps i can take to determine which of my websites is taking these resources and or what database is getting hit the most? I have of course ssms installed on the machine as well. As you can tell, my sysadmin skills are very very limited - any help would be much appreciated.

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• MDE Access decrypt JDBC

  - by michelemarcon

  I want to perform JDBC SQL queries on a MDE Access file. I've set up the data source ODBC and everything worked well for a MDE file. Now, I'm working with a newer version of the MDE file, and here is the result: java.sql.SQLException: [Microsoft][Driver ODBC Microsoft Access] Cannont read record. Read authorization unavailable for "tbl_mytable". If I open the MDE with Access Runtime I am asked for a password, and after leaving a blank password I can see all the data. Of course, "tbl_mytable" does exist inside the database.

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• How to define clock input in Xilinx

  - by seventeen

  Hey, I have almost no experience with Xilinx. I have a group project for a Digital Logic course that is due soon, where my partner, who was supposed to take care of the Xilinx simulations decided to bail on me. So here I am trying to figure it out last minute. I have designed a synchronous counter using a few JK Flip Flops and I need to define the CLK input for the FJKCs. I have drawn up the correct schematic, but I cannot figure out how to define a clock input. Any help appreciated, and yes, this is homework. I just can't find any basic xilinx documentation/tutorials online and I honestly don't have time to learn the whole IDE.

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• learning the Lower levels of computing

  - by Ben

  I am a software developer with four years experience in .Net development, I always like to keep up to date with the latest technologies (.net related normally) being released and love learning them. I didn't however go to university and learnt all I know through helpful colleagues, .Net courses, the internet and good old books. I feel that I am a good developer, but without learning the lower levels of a computer as you would in the first year of a computer related Uni course, I get lost when talking to people about a lot of more technical lower level computing. Is there a book(s) that anyone could recommend, that would cover the lower levels of what is going on when I click "Run" in Visual Studio? I feel out of my depth when my boss says to me "Thats running in the CPU cache" or "you're limited by disk reads there", and would like to feel more confident when talking about how the hardware talks to each other (CPU to RAM etc). Apologise if thats a vague question, or has been asked before (i did check and couldn't find anything on here that answers my question).

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• WPF: Aligning the base line of a Label and its TextBox

  - by Heinzi

  Let's say I have a simple TextBox next to a Label: <StackPanel> <StackPanel Orientation="Horizontal"> <Label Margin="3">MyLabel</Label> <TextBox Margin="3" Width="100">MyText</TextBox> </StackPanel> ... </StackPanel> This yields the following result: As you can see, the base lines of MyLabel and MyText are not aligned, which looks ugly. Of course, I could start playing around with the margins until they match up, but since this is such a common requirement I'm sure that WPF provides a much easier and more elegant solution, which I just haven't found yet...

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• Is it possible to calculate distance on GeoDjango in a SELECT statement?

  - by alex

  I am using MYSQL. I have a table with 1 column, a Point field. I want to SELECT all rows that have a point with a distance less than 50 meters of my given point. Simple enough, right? Below is how it's done in RAW SQL. But of course, I want to use GeoDjango to do this. cursor.execute("SELECT * FROM project_location WHERE\ (GLength(LineStringFromWKB(LineString(asbinary(utm), asbinary(PointFromWKB(point(%s, %s)))))) < 50)\

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