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• How can I keep directories in sync

  - by Guillaume Boudreau

  I have a directory, dirA, that users can work in: they can create, modify, rename and delete files & sub-directores in dirA. I want to keep another directory, dirB, in sync with dirA. What I'd like, is a discussion on finding a working algorithm that would achieve the above, with the limitations listed below. Requirements: 1. Something…

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• Automatically unsubscribe an event

  - by Cat

  Is it possible to do something like this in C#? Probably with Expressions. private void RegisterEvent(EventHandler handler, Action<EventArgs> action) { handler += action; m_toUnsubscribe.Add(handler, action); } ... in Dispose() { foreach(var pair in m_toUnsubscribe) { pair.handler -= pair.action; } }

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• ruby on rails - link_to() problem

  - by Oded Harth

  Hi, I made this link in order to destroy a comment :   <%= link_to 'Destroy Comment', [comment.post, comment], :confirm => 'Are you sure?', :method => :delete %> this suppose to send to the destroy action in the comments_controller. the problem is that it searches for the 'show' action, Instead of the…

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• Introduction to the ASP.NET Web API

  - by Stephen.Walther

  I am a huge fan of Ajax. If you want to create a great experience for the users of your website – regardless of whether you are building an ASP.NET MVC or an ASP.NET Web Forms site — then you need to use Ajax. Otherwise, you are just being cruel to your customers. We use Ajax extensively in several of the ASP.NET applications that my…

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• Introduction to the ASP.NET Web API

  - by Stephen.Walther

  I am a huge fan of Ajax. If you want to create a great experience for the users of your website – regardless of whether you are building an ASP.NET MVC or an ASP.NET Web Forms site — then you need to use Ajax. Otherwise, you are just being cruel to your customers. We use Ajax extensively in several of the ASP.NET applications that my…

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• Using WeakReference to resolve issue with .NET unregistered event handlers causing memory leaks.

  - by Eric

  The problem: Registered event handlers create a reference from the event to the event handler's instance. If that instance fails to unregister the event handler (via Dispose, presumably), then the instance memory will not be freed by the garbage collector. Example: class Foo { public event Action AnEvent; …

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• Search function fails because it refers to the wrong controller action?

  - by Christoffer

  My Sunspot search function (sunspot_rails gem) works just fine in my index view, but when I duplicate it to my show view my search breaks... views/supplierproducts/show.html.erb <%= form_tag supplierproducts_path, :method => :get, :id => "supplierproducts_search" do %> <p> <%= text_field_tag :search,…

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• WCF RIA Services DomainContext Abstraction Strategies–Say That 10 Times!

  - by dwahlin

  The DomainContext available with WCF RIA Services provides a lot of functionality that can help track object state and handle making calls from a Silverlight client to a DomainService. One of the questions I get quite often in our Silverlight training classes (and see often in various forums and other areas) is how the…

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• Routes for IIS Classic and Integrated Mode

  - by imran_ku07

       Introduction:             ASP.NET MVC Routing feature makes it very easy to provide clean URLs. You just need to configure routes in global.asax file to create an application with clean URLs. In most cases you define…

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• Instant Rename and Rename Refactoring

  - by Petr

  During the last weeks I have got  a few questions about rename refactoring and some users also complain to me that the refactoring in NetBeans 6.x was much faster. So I would like to explain the situation. For some people, who don't know, Instant Rename action and Rename Refactoring  can look like one…

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• Is there a theory for "transactional" sequences of failing and no-fail actions?

  - by Ross Bencina

  My question is about writing transaction-like functions that execute sequences of actions, some of which may fail. It is related to the general C++ principle "destructors can't throw," no-fail property, and maybe also with multi-phase transactions or exception safety. However, I'm thinking about it in…

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• Guarding against CSRF Attacks in ASP.NET MVC2

  - by srkirkland

  Alongside XSS (Cross Site Scripting) and SQL Injection, Cross-site Request Forgery (CSRF) attacks represent the three most common and dangerous vulnerabilities to common web applications today. CSRF attacks are probably the least well known but they are relatively easy to exploit and extremely and…

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• SQL ADO.NET shortcut extensions (old school!)

  - by Jeff

  As much as I love me some ORM's (I've used LINQ to SQL quite a bit, and for the MSDN/TechNet Profile and Forums we're using NHibernate more and more), there are times when it's appropriate, and in some ways more simple, to just throw up so old school ADO.NET connections, commands, readers and…

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• System.Threading.Timer keep reference to it.

  - by Daniel Bryars

  According to [http://msdn.microsoft.com/en-us/library/system.threading.timer.aspx][1] you need to keep a reference to a System.Threading.Timer to prevent it from being disposed. I've got a method like this: private void Delay(Action action, Int32 ms) { if (ms <= 0) { …

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• CakePHP belongsTo relationship with a variable 'model' field.

  - by gomezuk

  I've got a problem with a belongsTo relationship in CakePHP. I've got an "Action" model that uses the "actions" table and belongs to one of two other models, either "Transaction" or "Tag". The idea being that whenever a user completes a transaction or adds a tag, the action model is created…

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• Rails routing problem

  - by Steve

  I am new to Rails routing and I currently have a problem and hope someone can explain it to me. I am using Rails 2.3.5 Firstly, let me describe my working-fine code: I have a text example, which has a controller (cars_controller) with an update action (along with some other actions). The…

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• JTextArea - Highlight Text While Scrolling Up or Down

  - by Sujay

  I'm trying to work with a non-editable JTextArea added to a JScrollPane. I want a line to be highlighted when the user clicks on that specific line. I could implement this part using the following code: public static void initHighlightOption(final JTextArea textArea){ …

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• Generic FSM for game in C++ ?

  - by Mr.Gando

  Hello, I was wondering if there's a way I could code some kind of "generic" FSM for a game with C++?. My game has a component oriented design, so I use a FSM Component. my Finite State Machine (FSM) Component, looks more or less this way. class gecFSM : public…

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• how to call subactivity of another application android?

  - by Are

  Hi. To call main activity I saw componentName class in android. intent = new Intent(new ComponentName(packageNam,classname); if same is used in case of child activity, I got error , "is activity delcared in andorid manifest?" like error. how to call app1…

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• Making Extension method Generic

  - by Ian

  In this post there's a very interesting way of updating UI threads using a static extension method. public static void InvokeIfRequired(this Control c, Action<Control> action) { if(c.InvokeRequired) { c.Invoke(() => action(c)); }…

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• Designing a database for a user/points system? (in Django)

  - by AP257

  First of all, sorry if this isn't an appropriate question for StackOverflow. I've tried to make it as generalisable as possible. I want to create a database (MySQL, site running Django) that has users, who can be allocated a certain number of points for…

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• Improving WIF&rsquo;s Claims-based Authorization - Part 2

  - by Your DisplayName here!

  In the last post I showed you how to take control over the invocation of ClaimsAuthorizationManager. Then you have complete freedom over the claim types, the amount of claims and the values. In addition I added two attributes that invoke the…

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• Refactoring an ERB Template to Haml

  - by Liam McLennan

  ERB is the default view templating system used by Ruby on Rails. Haml is an alternative templating system that uses whitespace to represent document structure. The example from the haml website shows the following equivalent markup: …

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• Making a Statement: How to retrieve the T-SQL statement that caused an event

  - by extended_events

  If you’ve done any troubleshooting of T-SQL, you know that sooner or later, probably sooner, you’re going to want to take a look at the actual statements you’re dealing with. In extended events we offer an action (See the BOL topic that covers…

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• Organising levels / rooms in a MUD-style text based world

  - by Polynomial

  I'm thinking of writing a small text-based adventure game, but I'm not particularly sure how I should design the world from a technical standpoint. My first thought is to do it in XML, designed something like the following. Apologies for the…

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