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• Set Image Src to Local File

  - by cmessier

  I am writing a Firefox extension and would like the users to be able to change an image on a web page with a local image. Is it possible, using JavaScript, to change the image source with an image that is saved on the user's local machine? Let me know if you need more information. Thanks

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• How to allocate an executable page in a Linux kernel module?

  - by pts

  I'm writing a Linux kernel module, and I'd like to allocate an executable page. Plain kmalloc returns a pointer within a non-executable page, and I get a kernel panic when executing code there. It has to work on Ubuntu Karmic x86, 2.6.31-20-generic-pae.

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• Check for Windsor Container Component Instance

  - by jeffn825

  How can I use my Windsor container to check if an instance (not just a component) has been registered? ie. container.ContainsInstance(typeof(MyType)) [EDIT] Another way of writing this might be Kernel.GetAssignableHandlers(typeof(object)) .Where(handler => handler.Service == typeof(MyType) || handler.ComponentModel.Implementation == typeof(MyType)) .Any(handler => handler.***Instance*** != null) Note that the property Instance doesn't exist in the API. Thanks.

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• Where to find prebuilt binaries for subversion 1.6 for Ubuntu (or Debian)?

  - by Andrea Francia

  While I can easily find the binaries for the latest version of subversion (1.6) I can't find the binaries for Ubuntu (or Debian). The download page at tigris.org suggest to use the command: apt-get install subversion but as you can experience this will install up to the version 1.5.4 (at the time of writing May 6, 2009). This isn't a nice thing because many working copies that I share with Windows are automatically updated to 1.6 by TortoiseSVN.

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• Java I/O: How to append to an already existing text file.

  - by Joe

  Hi I am having no problem writing to or appending to a file, the only problem is that as soon as I quit the program and then run it again, it creates a new file overwriting my original file. This is a problem, as I am using the text file to keep a running tally. Is there a way to get an already created text file as an object and then append to it? Thanks in advance.

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• Best Method For Storing Values

  - by Josh streit

  Basically, I want to have a database that's lightweight and I won't need to install a million other things on my clients computers for them to access this. I just need a simple method of reading and writing values so that they're not hardcoded into the program. I could do MySQL (which is what I'm very familiar with), but it doesn't need to be making calls remotely. I would have less than 10 fields and one table, if that matters. Thanks!

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• How safe is apache Commons-javaflow while using jasperreports

  - by Nayn

  Hi, I am using jasperreport and trying to pass an alternate report runner. • net.sf.jasperreports.engine.fill.JRThreadSubreportRunner: The initial thread-based implementation • net.sf.jasperreports.engine.fill.JRContinuationSubreportRunner: A Javaflow-based implementation I am using the second one (for the reason, it runs on tomcat server, and creating threads wouldn't be good while writing subreports). The second one depends on commons-javaflow which is a sandbox version. Not sure if I should use it, Could somebody suggest a better way. Thanks

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• How much does Javascript garbage collection affect performance?

  - by Long Ouyang

  I'm writing a bunch of scripts that present images serially (e.g. 1 per second) and require the user to make either a keyboard or mouse response. I'm using closures to handle the timing of image presentation and user input. This causes garbage collection to happen pretty frequently and I'm wondering if that will affect the performance (viz. timing of image presentation).

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• Lightweight Relational database for BlackBerry OS 4.7

  - by Pavel

  Hey guys, I'm writing an app for BlackBerry OS 4.7 and would greatly benefit from having a lightweight relational database such as SQLite that my application can use to store data locally on the device. SQLite is coming out with 5.0, which is still in beta. Can anyone recommend any other alternatives that permit commercial use? Additional information: - Concurrent access not required - Transactions not required Thanks in advance :-)

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• How do I create a table in SQLite using the VS2008 Server Explorer

  - by fishhead

  Hello, I would like to create a table in a SQLite database using the Server Explorer in VS2008. I am able to do other operations on the database but when it comes to creating a table using the query builder I get Not Supported messages. is there another way other than writing code just for the sole purpose of creating the table? CREATE TABLE myTable ( ID INTEGER PRIMARY KEY AUTOINCREMENT, Name VARCHAR(100) ) .NET Framework Data Provider for SQLite 3.6.16

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• Is it better to use a relational database or document-based database for an app like Wufoo?

  - by mboyle

  I'm working on an application that's similar to Wufoo in that it allows our users to create their own databases and collect/present records with auto generated forms and views. Since every user is creating a different schema (one user might have a database of their baseball card collection, another might have a database of their recipes) our current approach is using MySQL to create separate databases for every user with its own tables. So in other words, the databases our MySQL server contains look like: main-web-app-db (our web app containing tables for users account info, billing, etc) user_1_db (baseball_cards_table) user_2_db (recipes_table) .... And so on. If a user wants to set up a new database to keep track of their DVD collection, we'd do a "create database ..." with "create table ...". If they enter some data in and then decide they want to change a column we'd do an "alter table ....". Now, the further along I get with building this out the more it seems like MySQL is poorly suited to handling this. 1) My first concern is that switching databases every request, first to our main app's database for authentication etc, and then to the user's personal database, is going to be inefficient. 2) The second concern I have is that there's going to be a limit to the number of databases a single MySQL server can host. Pretending for a moment this application had 500,000 user databases, is MySQL designed to operate this way? What if it were a million, or more? 3) Lastly, is this method going to be a nightmare to support and scale? I've never heard of MySQL being used in this way so I do worry about how this affects things like replication and other methods of scaling. To me, it seems like MySQL wasn't built to be used in this way but what do I know. I've been looking at document-based databases like MongoDB, CouchDB, and Redis as alternatives because it seems like a schema-less approach to this particular problem makes a lot of sense. Can anyone offer some advice on this?

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• JEXCelAPI on android

  - by user121196

  When I added the JExcelAPI http://jexcelapi.sourceforge.net/ to the class path and run my app, I get: trouble writing output: shouldn't happen [2009-07-16 14:32:19 - xxx] Conversion to Dalvik format failed with error 2 any idea? thanks

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• Win32: How do I get the listbox for a combobox

  - by Adam Tegen

  I'm writing some code and I need to get the window handle of the listbox associated with a combo box. When looking in spy++, it looks like the parent of the listbox is the desktop, not the combo box. How can I programmatically find the listbox window handle? I know I'd be looking for a window class of ComboLBox that belongs to my process, but how do I narrow that down to the specific one I am looking for? Adam

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• Indent guide plugin for gedit (python).

  - by aviraldg

  See the indent guides? They're damn helpful when writing Python code. Any chance I could get something similar for gedit? I wouldn't mind having to write my own plugin, as long as it's in Python... So: Is there a plugin for this which works with gedit? If not, would it be possible to write one in Python.

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• Display small form while main form is "locked"

  - by daemonsvk

  Hi there, i'm thinking about writing a WPF program that would require login and password at the app startup. I thought about small form with two textboxes as a login form. User will have to fill in his details and then the main form of the application will be unlocked. How will you solve this? Thanks for your answers, daemonsvk

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• Changing Passwords Over Multiple Servers and Services

  - by tesmar

  Hi all, I am looking to automate the changing of passwords across multiple services and servers. For example: I want to change the root paassword to all of my web servers at once. I am thinking of writing a ruby script, but have you guys run across anything already written? If so, would that also give me the ability to change other system passwords like Database passwords and SVN passwords.

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• Any one point me how to customize facebook share

  - by Venkat

  I am trying to share my own custom url, image, title and description using Facebook and twitter. I am having lot of images and videos in my website. So i want to make my content viral on social websites. I am trying to keep share options for both facebook and twitter for everything individually. If some one share one image i want that image in the sharing thumbnail and url will be the page url with my own title, description. Based on the url i will point the user to that pic in my website. I tried in the below way. Facebook share: <a href="javascript:;" onclick="window.open('http://www.facebook.com/share.php?u=your_page_url','facebook share','resizable=yes,width=700,height=500,scrollbars=yes,status=yes')"><img alt="facebook" src="yourimage.jpg" /></a> Twitter share: <a href="javascript:;" onclick="window.open('https://twitter.com/share','twitter share','resizable=yes,width=700,height=500,scrollbars=yes,status=yes')"><img alt="twitter" src="yourimage.jpg" /></a>

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• Using innerHTML.repalce to replace text with img element

  - by Vishal Shah

  I'm writing a script to add extra smileys to the Gmail chat. Its working partially, i'm stuck with the innerHTML.replace method @line 33 If you see, the regex in the replace method is passed using a variable. This is where the script is choking. If i replace the variable with the actual regex, it works fine :|

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• check properties of two objects for changes

  - by k-hoffmann

  Hi, i have to develop a mechanism to check two object properties for changes. All properties which are needed to check are marked with an attribute. Atm i - read all properties from acutal object via linq - read the corresponding property from old object - fill an own object with the two properties (old and new value) In Code the call to the workerclass looks like this public void CreateHistoryMap(BaseEntity actual, BaseEntity old) { CreateHistoryMap(actualEntity, oldEntity) .ForEach(mapEntry => CreateHistoryEntry(mapEntry), mapEntry => IfChangesDetected(mapEntry)); } CreateHistoryMap builds up the HistoryMapEntry which contains the two properties. CreateHistoryEntry build up the object which is saved to database, the IfChangesDetected check the object for changes. I have to handle own special application types to generate history values to database (like concatinating list values and so on). My problem is now, that i have to read the values of the properties twice - for change detection - and for the concreate CreateHistoryEntry How can i eliminate this problem or how can i implement the change tracking scenario with the nice c# 3.5 features? Thanks a lot.

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• Are there good reasons not to use an ORM?

  - by hangy

  During my apprenticeship, I have used NHibernate for some smaller projects which I mostly coded and designed on my own. Now, before starting some bigger project, the discussion arose how to design data access and whether or not to use an ORM layer. As I am still in my apprenticeship and still consider myself a beginner in enterprise programming, I did not really try to push in my opinion, which is that using an object relational mapper to the database can ease development quite a lot. The other coders in the development team are much more experienced than me, so I think I will just do what they say. :-) However, I do not completely understand two of the main reasons for not using NHibernate or a similar project: One can just build one’s own data access objects with SQL queries and copy those queries out of Microsoft SQL Server Management Studio. Debugging an ORM can be hard. So, of course I could just build my data access layer with a lot of SELECTs etc, but here I miss the advantage of automatic joins, lazy-loading proxy classes and a lower maintenance effort if a table gets a new column or a column gets renamed. (Updating numerous SELECT, INSERT and UPDATE queries vs. updating the mapping config and possibly refactoring the business classes and DTOs.) Also, using NHibernate you can run into unforeseen problems if you do not know the framework very well. That could be, for example, trusting the Table.hbm.xml where you set a string’s length to be automatically validated. However, I can also imagine similar bugs in a “simple” SqlConnection query based data access layer. Finally, are those arguments mentioned above really a good reason not to utilise an ORM for a non-trivial database based enterprise application? Are there probably other arguments they/I might have missed? (I should probably add that I think this is like the first “big” .NET/C# based application which will require teamwork. Good practices, which are seen as pretty normal on Stack Overflow, such as unit testing or continuous integration, are non-existing here up to now.)

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• How to get icons for entities from eclipse?

  - by fastcodejava

  I am writing an eclipse plugin. How do I get the various images from eclipse library? So I don't have have keep a local set of images for the standard entities, e.g classes, interfaces, junits, etc. EDIT : I used PlatformUI.getWorkbench().getSharedImages().getImage(ISharedImages.IMG_OBJ_FILE) from the article : http://www.eclipse.org/articles/Article-Using%20Images%20In%20Eclipse/Using%20Images%20In%20Eclipse.html. That did not work.

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• How to change label content with timers throwing InvalidOperationException.

  - by Guru

  Hi there, I'm making an application and I'm using a timer in that application to change label content in WPF C# .NET. In timer elapsed event I'm writing the following code lblTimer.Content = "hello"; but its throwing an InvalidOperationException and gives a message "The calling thread cannot access this object because a different thread owns it." I'm using .NET framework 3.5 and WPF with C#. Please help me. Thanks in advance.

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• Internet basic concepts

  - by MB

  Hi, for school im writing an introduction to internet concepts, what should be the first thing to explain? Maybe client-server relation, TCP/IP protocol or something else?

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• asp.net on linux/mono broken? weird load then 404/resource error

  - by acidzombie24

  I am testing out my asp.net on mono's VM Ware Image using opensuse From the home page it says Trying out your own code You can test your own applications by connecting with the file manager on this machine to the machine hosting your application, and copying over the directory containing application and its associated files. To test your ASP.NET applications, copy your code to a new directory in /srv/www/htdocs , then visit the following url: http://localhost/directoryname/page.aspx Where directoryname is the directory where you deployed your application, and page.aspx is the initial page for your software, typically Default.aspx. Mirror: http://tortillaflatscafe.com/ I saw my app had errors. After i restarted the VM i can no longer run my app. Instead of getting error messages or anything i get this error instead. Server Error in '/myfoldername' Application The resource cannot be found. Description: HTTP 404. The resource you are looking for (or one of its dependencies) could have been removed, had its name changed, or is temporarily unavailable. Please review the following URL and make sure that it is spelled correctly. Requested URL: /Default.aspx I tried /default.aspx, using sudo to set permissions to 777 recursively, restarting apache via terminal i could not get this error to go away. How do i fix this?

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• Invoke Command When "ENTER" Key Is Pressed In XAML

  - by bitxwise

  I want to invoke a command when ENTER is pressed in a TextBox. Consider the following XAML: <UserControl ... xmlns:i="clr-namespace:System.Windows.Interactivity;assembly=System.Windows.Interactivity" ...> ... <TextBox> <i:Interaction.Triggers> <i:EventTrigger EventName="KeyUp"> <i:InvokeCommandAction Command="{Binding MyCommand}" CommandParameter="{Binding Text}" /> </i:EventTrigger> </i:Interaction.Triggers> </TextBox> ... </UserControl> and that MyCommand is as follows: public ICommand MyCommand { get { return new DelegateCommand<string>(MyCommandExecute); } } private void MyCommandExecute(string s) { ... } With the above, my command is invoked for every key press. How can I restrict the command to only invoke when the ENTER key is pressed? I understand that with Expression Blend I can use Conditions but those seem to be restricted to elements and can't consider event arguments. I have also come across SLEX which offers its own InvokeCommandAction implementation that is built on top of the Systems.Windows.Interactivity implementation and can do what I need. Another consideration is to write my own trigger, but I'm hoping there's a way to do it without using external toolkits.

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