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• With MVVM, does each UI window have its own ViewModel?

  - by j0rd4n

  When I'm designing multiple views under the MVVM pattern, does each view get its own ViewModel or do they all share the same one? I understand that this is ultimately a flexible decision, but what is the best practice? My gut tells me to have a ViewModel for each view (i.e. each separate UI window). All of the blog examples of MVVM show a single view but not much beyond that.

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• Does EGit mandate installing JGit?

  - by Souper

  After using Git from the command line for a while, I am ready for the convenience a GUI plugin (for Eclipse) can offer. However, I prefer a Git plugin similar to to MS Visual Studio's Git Source Control Provider which is only a wrapper around the already installed msysgit. I really don't want two different Git implementations accessing the same repository. EGit sounds perfect - if it can use the already installed msysgit in my PC. But can it?

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• What's wrong with my using svn this way?

  - by httpinterpret

  I started svn server this way: [user@vps303 trunkdb]# svnserve -d -r /repositories/ [user@vps303 trunkdb]# ls /repositories/ trunk But when I connect to svn://domain.name it reports no such repository, but when I connect to svn://domain.name/trunk, it's OK. How can I connect to svn://domain.name ?

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• QuickActions like the Twitter app

  - by Macarse

  I want to add Pattern 6: QuickActions from android's blog to my app. Any code snippet? Anyone try to do it already? Should this work on android 1.5?

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• How to get svn history from google code

  - by nunos

  I have a project hosted at code.google.com. I would like to get the history of commits to the svn repository. I have tortoise svn installed. How can I do that? Thanks.

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• Maven: Where be the code?

  - by steve

  Greetings, Can anyone tell me how the heck I'm meant to use a maven repository or whatever the term is with a project? I've downloaded the OAuth library from Google. I run mvn compile, test, install, deploy I want to know where the Jar goes so I can just put it into my class path. Any help appreciated!

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• Undo/Redo using Memento: Stack, Queue or just LinkedList?

  - by serhio

  What is the best having when implementing Memento pattern (for Undo/Redo) in witch collection to Keep Mementos? Basically, I need this(c = change, u = undo, r = redo): 0 *c -1 0 *c -2 -1 0 *c -3 -2 -1 0 <u -2 -1 0 1 *c -3 -2 -1 0 Variants: LinkedList - possible in principle, maybe not optimized. Queue - not adapted for this task, IMO. Stack - not adapted for undo AND redo; Double Stack - maybe optimal, but can't control the undo maximum size.

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• hg convert from cvs broke branches

  - by luminger

  I converted an old cvs repository into mercurial via "hg convert". Everything seemed to be okay (at least with the default branch) but all feature branches are missing files which haven't been changed in the branch. Is there any way to fix this up? I'm using version 1.5, convert has been done via "hg convert cvs/checkout newrepo".

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• Where to put common setUp-code for differen testclasses?

  - by Benedikt

  I have several different test classes that require that certain objects are created before those tests can be run. Now I'm wondering if I should put the object initialization code into a separate helper class or superclass. Doing so would surely reduce the amount of duplicate code in my test classes but it would also make them less readable. Is there a guideline or pattern how to deal with common setUp-code for unit tests?

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• web service for business logic or data access layer

  - by luiscarlosch

  This post http://www.theserverside.net/tt/articles/showarticle.tss?id=Top5WSMistakes encourages me to create the web service for business logic layer but many people use it in the data access layer. I want to create a project where i want to access the same data repository from a desktop application, website and a cell phone. What would you recommend me? Is there any case it may be a good idea implement web services to both layers? thanks.

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• Bash script: regexp reading numerical parameters from text file

  - by Andrey Kazak

  Greetings! I have a text file with parameter set as follows: NameOfParameter Value1 Value2 Value3 ... ... I want to find needed parameter by its NameOfParameter using regexp pattern and return a selected Value to my Bash script. I tried to do this with grep, but it returns a whole line instead of Value. Could you help me to find as approach please?

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• Accessing parent-level controls from inside a ComboBox's child controls

  - by eponymous23

  I have XAML similar to this: <ListBox ItemsSource="{Binding SearchCriteria, Source={StaticResource model}}" SelectionChanged="cboSearchCriterionType_SelectionChanged"> <ListBox.ItemTemplate> <DataTemplate> <StackPanel Name="spCriterion" Orientation="Horizontal" Height="20"> <ComboBox Name="cboSearchCriterionType" Width="120" SelectionChanged="cboSearchCriterionType_SelectionChanged"> <ComboBox.Items> <ComboBoxItem IsSelected="True" Content="Anagram Match" /> <ComboBoxItem Content="Pattern Match" /> <ComboBoxItem Content="Subanagram Match" /> <ComboBoxItem Content="Length" /> <ComboBoxItem Content="Number of Vowels" /> <ComboBoxItem Content="Number of Anagrams" /> <ComboBoxItem Content="Number of Unique Letters" /> </ComboBox.Items> </ComboBox> <TextBox x:Name="SearchSpec" Text="{Binding SearchSpec}" /> <TextBox x:Name="MinValue" Text="{Binding MinValue}" Visibility="Collapsed" /> <TextBox x:Name="MaxValue" Text="{Binding MaxValue}" Visibility="Collapsed" /> </StackPanel> </DataTemplate> </ListBox.ItemTemplate> As you can tell from the markup, I have a listbox that is bound to a collection of SearchCriterion objects (collectively contained in a SearchCriteria object). The idea is that the user can add/remove criterion items from the criteria, each criterion is represented by a listbox item. Inside the listbox item I have a combobox and three textboxes. What I'm trying to do is change the visibility of the TextBox controls depending on the item that is selected in the ComboBox. For example, if the user selects "Pattern Match" then I want to show only the first textbox and hide the latter two; conversely, if the user selects "Length" or any of the "Number of..." items, then I want to hide the first TextBox and show the latter two. What is the best way to achieve this? I was hoping to do something simple in the SelectionChanged event handler for the listbox but the textbox controls are presumably out of the SelectionChanged event's scope. Do I have to programmatically traverse the control hierarchy and find the controls?

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• Why are these two sql statements deadlocking? (Deadlock graph + details included).

  - by Pure.Krome

  Hi folks, I've got the following deadlock graph that describes two sql statements that are deadlocking each other. I'm just not sure how to analyse this and then fix up my sql code to prevent this from happening. Main deadlock graph Click here for a bigger image. Left side, details Click here for a bigger image. Right side, details Click here for a bigger image. What is the code doing? I'm reading in a number of files (eg. lets say 3, for this example). Each file contains different data BUT the same type of data. I then insert data into LogEntries table and then (if required) I insert or delete something from the ConnectedClients table. Here's my sql code. using (TransactionScope transactionScope = new TransactionScope()) { _logEntryRepository.InsertOrUpdate(logEntry); // Now, if this log entry was a NewConnection or an LostConnection, then we need to make sure we update the ConnectedClients. if (logEntry.EventType == EventType.NewConnection) { _connectedClientRepository.Insert(new ConnectedClient { LogEntryId = logEntry.LogEntryId }); } // A (PB) BanKick does _NOT_ register a lost connection .. so we need to make sure we handle those scenario's as a LostConnection. if (logEntry.EventType == EventType.LostConnection || logEntry.EventType == EventType.BanKick) { _connectedClientRepository.Delete(logEntry.ClientName, logEntry.ClientIpAndPort); } _unitOfWork.Commit(); transactionScope.Complete(); } Now each file has it's own UnitOfWork instance (which means it has it's own database connection, transaction and repository context). So i'm assuming this means there's 3 different connections to the db all happening at the same time. Finally, this is using Entity Framework as the repository, but please don't let that stop you from having a think about this problem. Using a profiling tool, the Isolation Level is Serializable. I've also tried ReadCommited and ReadUncommited, but they both error :- ReadCommited: same as above. Deadlock. ReadUncommited: different error. EF exception that says it expected some result back, but got nothing. I'm guessing this is the LogEntryId Identity (scope_identity) value that is expected but not retrieve because of the dirty read. Please help! PS. It's Sql Server 2008, btw.

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• Multithreading, when to yield versus sleep

  - by aaa

  hello. To clarify terminology, yield is when thread gives up its time slice. My platform of interest is POSIX threads, but I think question is general. Suppose I have consumer/producer pattern. If I want to throttle either consumer or producer, which is better to use, sleep or yield? I am mostly interested in efficiency of using either function. Thanks

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• Looking for design help

  - by jess

  I have this scenario in most of the WindowsForms having grids I have a sequence of code which is similar - AddNewRow(in grid),CreateNewEntity,notifyUser,few other steps Now, I want to use a template kind of pattern.But,my issue is with CreateEntity method since sometimes it is passed a parameter which is different depending on the type of object being created.Should I make createentity accept an "object" type,and cast when the parameter is to be used.What other way can I tackle this design issue? Also,CreateEntity returns the object being created.

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• Linq qurery with multiple where's

  - by Dan

  I am trying the to query my Status Update repository using the following var result = (from s in _dataContext.StatusUpdates where s.Username == "friend1" && s.Username == "friend2" etc... select s).ToList(); Insead of using s.Username == "friendN" continously is there anyway I can pass a list or array or something like that rather that specifying each one, or can i use a foreach loop in the middle of the query. Thanks

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• How to control which keyboard is displayed when a user touches a text field in iPad?

  - by Edmund

  I am currently developing a web application to be run in iPad. How do I control which keyboard is displayed when a user touches a text field? input type="text" pattern="[0-9]*" I have tried the above html codes which tested working in ITouch but in the Apple iPad SDK emulator, it imply brings up the normal keyboard. Any idea? Thank you.

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• Java: Make a method abstract for each extending class

  - by Martijn Courteaux

  Hi, Is there any keyword or design pattern for doing this? public abstract class Root { public abstract void foo(); } public abstract class SubClass extends Root { public void foo() { // Do something } } public class SubberClass extends SubClass { // Here is it not necessary to override foo() // So is there a way to make this necessary? // A way to obligate the developer make again the override } Thanks

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• How would I hook Trac up to multiple repositories?

  - by KevinDeus

  in this case I don't want to use the ticketing system or the wiki, simply connect it to browse multiple repos. I would think it would be as easy as having a script update the repository link in its conf.ini file every time you wanted to look at a new repo, right?

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• wpf mvvm datagrid selectedrow

  - by 2Fast4YouBR

  Hi, after some google around, I just figured out that there is no one that is using 100% MvvM pattern to get the ToolKit DataGrid events ! Is that impossible or what ? I see too much people using the code-behind... How can I get the SelectedRow or dblClick events using mvvm ? cheers

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• Getting Exception to Get record by ID using NHibernate

  - by Muhammad Akhtar

  hello dear, I am new to Nhibernate, I am trying to get record by ID and I am getting exception Unknown entity class: DAL.Product here is my line of code where I am getting exception.. Repository.Get<Product>(id); What could be the issue? Thanks for your help.

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• mercurial for OS projects and svn for Enterprise projects?

  - by ajsie

  correct me if im wrong, but isn't distributed SCMs for OS projects while centralized SCMs are better for corporate/private projects? cause with eg. mercurial anyone gets an exact copy of the repository with FULL history features, while with centralized you only get the latest working copy. im more focused on private projects so i wonder if its better with centralized SCMs or doesnt it matter?

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• repeat image c#

  - by sam

  Hi folks., i have an image with certain pattern.. i need to repeat it in another image using GDi? is there any method to do in GDI?

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• Git is failing to push in puttycyg because of SSH error

  - by tpower

  I've been using puttycyg as a Cygwin terminal for my rails development. I've set up a git repository on a project management website and now I want to push my code to it with the following command: git push origin master I'm getting the following error: error: cannot run ssh: No such file or directory fatal: unable to fork I know ssh is used for authentication but I don't know if I need to set anything up to use it.

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• How to restrict code from developers

  - by Kelvin

  My company is planning in hiring outsourcers to work for us, but concerned to give whole existing code to outside world. What is the proper way to deal with security of sharing code in such cases? Is it possible to restrict part of code for developers? So each of them could work on their project without having access to whole repository. P.S. The code we have is very integrated, and its hard to extract "one module", each module can use files from different locations. Thanks in advance

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