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• Sharing assemblies between .Net 4 and Silverlight 4

  - by chris

  At the last PDC (can't remember which talk it was) they gave us the information that it will be possible to share assemblies between regular .Net 4 and Silverlight 4. Unfortunately I can't find anything on this. Was this feature dropped? What options/limitations are there? (There are similar questions on SO but they don't say if they apply to SL3 or 4.)

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• Replace all white/nearly white pixels in a UIImage with alpha using CGImage?

  - by Peter Hajas

  Hi there, I have a UIImage with white background. I would like replace the white background/pixels with alpha-transparent pixels. I've looked at other questions on StackOverflow, along with Quartz documentation, but have yet to find a coherent "start-to-end" for this problem. How is this done?

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• C# Finalize/Dispose pattern

  - by robUK

  Hello, C# 2008 I have been working on this for a while now. And I am still confused about some issues. My questions below 1) I know that you only need a finalizer if you are disposing of unmanaged resources. However, if you are using managed resources that make calls to unmanaged resources. Would you still need to implement a finalizer? 2) However, if you develop a class that doesn't use any unmanged resources directly or indirectly and you implement the IDisposable so that clients of your class can use the 'using statement'. Would it be acceptable to implement the IDisposable just so that clients of your class can use the using statement? using(myClass objClass = new myClass()) { // Do stuff here } 3) I have developed this simple code below to demostrate the Finalize/dispose pattern: public class NoGateway : IDisposable { private WebClient wc = null; public NoGateway() { wc = new WebClient(); wc.DownloadStringCompleted += wc_DownloadStringCompleted; } // Start the Async call to find if NoGateway is true or false public void NoGatewayStatus() { // Start the Async's download // Do other work here wc.DownloadStringAsync(new Uri(www.xxxx.xxx)); } private void wc_DownloadStringCompleted(object sender, DownloadStringCompletedEventArgs e) { // Do work here } // Dispose of the NoGateway object public void Dispose() { wc.DownloadStringCompleted -= wc_DownloadStringCompleted; wc.Dispose(); GC.SuppressFinalize(this); } } Question about the source code: 1) Here I have not added the finalizer. And normally the finalizer will be called by the GC, and the finalizer will call the Dispose. As I don't have the finalizer, when do I call the Dispose method? Is it the client of the class that has to call it? So my class in the example is called NoGateway and the client could use and dispose of the class like this: Would the Dispose method be automatically called when execution reaches the end of the using block? using(NoGateway objNoGateway = new NoGateway()) { // Do stuff here } Or does the client have to manually call the dispose method i.e.? NoGateway objNoGateway = new NoGateway(); // Do stuff with object objNoGateway.Dispose(); // finished with it Many thanks for helping with all these questions, 2) I am using the webclient class in my 'NoGateway' class. Because the webclient implements the IDisposable interface. Does this mean that the webclient indirectly uses unmanaged resources? Is there any hard and fast rule to follow about this. How do I know that a class uses unmanaged resources?

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• Do I need to check capacity before adding an element to a vector in c++ ?

  - by Cassie

  Hi dear all, I am a newbie to c++ STL vectors so sorry for silly questions in advence. :) In my program, I have a vector which needs to store unknown number of elements. Do I have to check if the vector has achieved its max_size before adding an new element to it ? Will a c++ compiler throw an exception automatically when a program tries to add elements to a full vector ? Thank you very much, Cassie

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• What is a .NET app domain?

  - by Luke

  In particular, what are the implications of running code in two different app domains? How is data normally passed across the app domain boundary? Is it the same as passing data across the process boundary? I'm curious to know more about this abstraction and what it is useful for. EDIT: Good existing coverage of AppDomains in general at http://stackoverflow.com/questions/622516/i-dont-understand-appdomains

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• Why did Matz choose to make Strings mutable by default in Ruby?

  - by Seth Tisue

  It's the reverse of this question: http://stackoverflow.com/questions/93091/why-cant-strings-be-mutable-in-java-and-net Was this choice made in Ruby only because operations (appends and such) are efficient on mutable strings, or was there some other reason? (If it's only efficiency, that would seem peculiar, since the design of Ruby seems otherwise to not put a high premium on faciliating efficient implementation.)

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• Books or resources for high-loaded sites.

  - by Alex

  Currently I'm developing high-loaded financial portal(we use LAMP to run our project). There are great number of incoming data to be processed and stored. So optimization tasks become very important for us. Could you suggest books, articles or resources, that discover optimization questions (especially bboks). NOTE: At the moment I'm reading great book High Performance MySQL, but besides I want to know other facilities of optimization.

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• Button template with image and text in wpf

  - by Archana R

  Hello, I want to create buttons with images and text inside. For example, i would use different images and text for buttons like 'Browse folders' and 'Import'. One of the options would be to use a template. I had a look at simliar question http://stackoverflow.com/questions/1933127/creating-an-imagetext-button-with-a-control-template But is there any way by which i can bind the source of image without using a dependency property or any other class? Thanks

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• Question about eval in PHP 5

  - by SpawnCxy

  Hi all, I have been doing PHP stuff for almost one year and I have never used the function eval() though I know the usage of it. But I found many questions about it in SO.So can someone show me a simple example in which it's necessary to use eval()?And is it a good or bad practice?

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• How many times can classes be nested within a class?

  - by Kushal Paudyal

  I came across this questions on one of the online Java Tests. The options were 4,5,8 and any number of times. I have only used one inner class, but have never tried multiple ones. I was wondering if anyone knows the answer.

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• Code review tool for Vault

  - by Miki Watts

  We're using Vault from SourceGear as our source control repository. Does anyone know if there's a code review tool that can work with Vault, or something that can work with local files ? I've checked the related questions, but I didn't see something that works with local files (of course I may have just missed it).

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• How to add page title in url in asp.net mvc? (url generation)

  - by Ante

  How to dynamically create urls/links like: www.restaurant.com/restaurant/restaurant-name-without-some-characters-like-space-coma-etc/132 what are the keywords i can use to google some articles on this topic? (how to genererate and handle this kind of urls inside asp.net mvc) There are some questions: How to generate links? (store slugs in db?) Redirect or not if slug isn't canonical? edit: apparently they are called slugs

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• Infinite scrolling in Silverlight

  - by shannon.stewart

  I've found a few questions about infinite scrolling already posted, but none were about Silverlight, so I thought I'd ask. I've done some initial searching, but haven't been able to find any reference material on how to implement infinite scrolling in Silverlight. This is more of a brain-storming exercise so I can get some thoughts on different ways to implement this.

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• Is there a minimum spanning tree that does not contain the min/max weighted edge?

  - by Martin

  If we have an (arbitrary) connected undirected graph G, whose edges have distinct weights, does every MST of G contains the minimum weighted edge? is there an MST of G that does not contain the maximum weighted edge? Also, I'm more thankful if someone can give a hint of the key things one must keep in mind when dealing with such MST questions. Thanks

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• What are Early and Late Binding?

  - by James A. Rosen

  In the spirit of asking the questions that need to be asked . . . what is the difference between early and late binding?

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• How to make multiple instances of RCVR, RQSTR and CLUSRCVR channels in WMQ?

  - by Dr. Xray

  This is a follow up on the question below, but it deserves another question. http://stackoverflow.com/questions/1821514/are-server-conn-and-client-conn-channels-the-only-channels-that-could-have-more-t To my understanding, a receiver (or cluster receiver) channel usually pair up with a single sender (or cluster sender) channel. How can one side being single instance while the other side being multiple instances? Thanks.

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• UINavigationController Back Button not visible, but works

  - by cagreen

  I have a scenario where my UINavigationController is missing the back button (left button) but tapping the left button still seems to work. I found a similar problem posted here: http://stackoverflow.com/questions/919832/uinavigationcontrollers-back-button-disappears which was resolved by not setting the title to @"", but that's not my problem. Are there any other scenarios that would cause this behaviour? Thanks.

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• In Php, Calling an array when it's name is stored in a variable

  - by tridat

  Possible duplicate: http://stackoverflow.com/questions/433302/php-convert-a-string-to-variable for example: $test = array("this","is","a","test"); $what_array_to_read = "$test[0]"; function to read the array $test[0]

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• "Select NOT IN" clause in Linq to Entities

  - by lnetanel

  Hi, Is there a way to use the "NOT IN (select XXX...)" clause in Linq to Entities? All the questions I found were regarding a list of objects (IN (1,2,3)) but I want to generate a query with the following syntax: "select * from table1 where field1 not in(select subfield from subtable)" Be aware that this is Linq to Entities and not Linq to Sql... Is it possible? Thanks!

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• Career Suggestion

  - by Filthy Night

  Hi all, i want to choose iphone development as my career, but i am confused about following questions. 1) is iPhone short term technology ( i mean like asp was gone after dot net came) 2) is iPhone only gaming technology 3) should i go with iphone or dot net

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• How to change easily between ajax-based website and basic HTML website?

  - by A.S al-shammari

  Hi, I have a website ( based on JSP/Servlets ,using MVC pattern), and I want to support AJAX-based website and basic HTML-based website. website visitors should be able to change the surfing mode from Ajax to basic HTML and vise versa, - as it applies in Google-mail. The Questions : What is the best way to achieve this goal easily? Should I design two views for each page? I use JQuery and JSON as the result of this answer.

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• DataGridView checkbox column - value and functionality

  - by nav

  Here is a reference the old SO question. http://stackoverflow.com/questions/1237829/datagridview-checkbox-column-value-and-functionality/1395215#1395215 I need to know, how would I get the information from a specific cell, so that i may further make the crystal report of the checked rows of datagridview. Thanks. -nav

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• how to write unicode hello world in C on windows

  - by hatchetman82

  im tyring to get this to work: #define UNICODE #define _UNICODE #include <wchar.h> int main() { wprintf(L"Hello World!\n"); wprintf(L"£?, ?, ?!\n"); return 0; } using visual studio 2008 express (on windows xp, if it matters). when i run this from the command prompt (started as cmd /u which is supposed to enable unicode ?) i get this: C:\dev\unicodevs\unicodevs\Debugunicodevs.exe Hello World! -ú8 C:\dev\unicodevs\unicodevs\Debug which i suppose was to be expected given that the terminal does not have the font to render those. but what gets me is that even if i try this: C:\dev\unicodevs\unicodevs\Debugcmd /u /c "unicodevs.exe output.txt" the file produced (even though its UTF-8 encoded) looks like: Hello World! £ì the source file itself is defined as unicode (encoded in UTF-8 without BOM). the compiler output when building: 1------ Rebuild All started: Project: unicodevs, Configuration: Debug Win32 ------ 1Deleting intermediate and output files for project 'unicodevs', configuration 'Debug|Win32' 1Compiling... 1main.c 1.\main.c(1) : warning C4005: 'UNICODE' : macro redefinition 1 command-line arguments : see previous definition of 'UNICODE' 1.\main.c(2) : warning C4005: '_UNICODE' : macro redefinition 1 command-line arguments : see previous definition of '_UNICODE' 1Note: including file: C:\Program Files\Microsoft Visual Studio 9.0\VC\include\wchar.h 1Note: including file: C:\Program Files\Microsoft Visual Studio 9.0\VC\include\crtdefs.h 1Note: including file: C:\Program Files\Microsoft Visual Studio 9.0\VC\include\sal.h 1C:\Program Files\Microsoft Visual Studio 9.0\VC\include\sal.h(108) : warning C4001: nonstandard extension 'single line comment' was used 1Note: including file: C:\Program Files\Microsoft Visual Studio 9.0\VC\include\crtassem.h 1Note: including file: C:\Program Files\Microsoft Visual Studio 9.0\VC\include\vadefs.h 1Note: including file: C:\Program Files\Microsoft Visual Studio 9.0\VC\include\swprintf.inl 1Note: including file: C:\Program Files\Microsoft Visual Studio 9.0\VC\include\wtime.inl 1Linking... 1Embedding manifest... 1Creating browse information file... 1Microsoft Browse Information Maintenance Utility Version 9.00.30729 1Copyright (C) Microsoft Corporation. All rights reserved. 1Build log was saved at "file://c:\dev\unicodevs\unicodevs\unicodevs\Debug\BuildLog.htm" 1unicodevs - 0 error(s), 3 warning(s) ========== Rebuild All: 1 succeeded, 0 failed, 0 skipped ========== any ideas on what am i doing wrong ? similar questions on ST (like this one: http://stackoverflow.com/questions/787589/unicode-hello-world-for-c) seem to refer to *nix builds - as far as i understand setlocale() is not available for windows. i also tried building this using code::blocks/mingw gcc, but got the same results.

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• add extra hint icon at current google map

  - by user315396

  my code is written from http://stackoverflow.com/questions/1171433/jquery-xml-and-google-map Now all marker icons can be displayed at current google map. But now I want to add some function. When getting description of item (it will map to opposite icon) ,if user click this description, a hint will display near the map icon at google. I still can't how to start.I can get lat and lng of location. PS:some of markers will map to same point.

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• Correct way of using/testing event service in Eclipse E4 RCP

  - by Thorsten Beck

  Allow me to pose two coupled questions that might boil down to one about good application design ;-) What is the best practice for using event based communication in an e4 RCP application? How can I write simple unit tests (using JUnit) for classes that send/receive events using dependency injection and IEventBroker ? Let’s be more concrete: say I am developing an Eclipse e4 RCP application consisting of several plugins that need to communicate. For communication I want to use the event service provided by org.eclipse.e4.core.services.events.IEventBroker so my plugins stay loosely coupled. I use dependency injection to inject the event broker to a class that dispatches events: @Inject static IEventBroker broker; private void sendEvent() { broker.post(MyEventConstants.SOME_EVENT, payload) } On the receiver side, I have a method like: @Inject @Optional private void receiveEvent(@UIEventTopic(MyEventConstants.SOME_EVENT) Object payload) Now the questions: In order for IEventBroker to be successfully injected, my class needs access to the current IEclipseContext. Most of my classes using the event service are not referenced by the e4 application model, so I have to manually inject the context on instantiation using e.g. ContextInjectionFactory.inject(myEventSendingObject, context); This approach works but I find myself passing around a lot of context to wherever I use the event service. Is this really the correct approach to event based communication across an E4 application? how can I easily write JUnit tests for a class that uses the event service (either as a sender or receiver)? Obviously, none of the above annotations work in isolation since there is no context available. I understand everyone’s convinced that dependency injection simplifies testability. But does this also apply to injecting services like the IEventBroker? This article describes creation of your own IEclipseContext to include the process of DI in tests. Not sure if this could resolve my 2nd issue but I also hesitate running all my tests as JUnit Plug-in tests as it appears impractible to fire up the PDE for each unit test. Maybe I just misunderstand the approach. This article speaks about “simply mocking IEventBroker”. Yes, that would be great! Unfortunately, I couldn’t find any information on how this can be achieved. All this makes me wonder whether I am still on a "good path" or if this is already a case of bad design? And if so, how would you go about redesigning? Move all event related actions to dedicated event sender/receiver classes or a dedicated plugin?

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