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• C++ Function arguments validation (pointer vs. reference arguments)

  - by Andrew

  Hello everyone, What do you consider a better programming practice: passing objects as pointers or references to functions. What do you do for input validation? Thanks.

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• Creating Haskell instance declarations

  - by btl

  Hello, complete noob to Haskell here with probably an even noobier question. I'm trying to get ghci output working and am stuck on instance declarations. How could I declare an instance for "(Show (Stack - Stack))" given: data Cmd = LD Int | ADD | MULT | DUP deriving Show type Prog = [Cmd] type Stack = [Int] type D = Stack -> Stack I've been trying to create a declaration like: instance Show D where show = Stack but all my attempts have resulted in illegal instance declarations. Any help and/or references much appreciated!

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• Play .WAV under Mono on Mac OS X (Snow Leopard)?

  - by Bob Denny

  The Mono 2.6 distribution contains System.Media.SoundPlayer, but attempts to play result in no sound (and no errors) on Mac OS X. All I can find with Google search is obscure references to ALSA. I posted to the Mono-OSX list, but there have been on replies there. I hope someone here has an answer. I think I need to tap into CoreAudio, but don't know how from Mono/C#.

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• Strong Signing, and Updating A Referencing Assembly

  - by Alan

  Hi, I have two, third party assemblies: Foo.dll and ReferencesFoo.dll As noted, ReferencesFoo.dll is an assembly that has a reference to Foo.dll For my application, I need to resign these assemblies. I use ildasm/ilasm in combination along with a signing key to resign them, however, ReferencesFoo.dll still contains (in it's manifest?) the reference to the Foo.dll old public key and public key token. So, how do I sign both dll's with my key, and update the references in ReferencesFoo.dll without getting the source code and recompiling?

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• Xml.Linq library in Silverlight 3.0

  - by Jayesh

  Hi, I am working on a Silverlight 3.0 application I have added a reference to the System.Xml.linq dll. I can also can see it in the references folder of my Silverlight app. however when I try to use it [using System.Xml.linq] it says are you missing an assembly reference! I am stumped! Please help

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• Custom URL Scheme from settings.bundle

  - by S-T-R-E-G-A

  Is it possible to set a custom URL scheme to launch my app from a link but make this a user defined setting? My app relies on a user defined server url and I would like to be able to set a URL scheme to launch my app using the users custom URL from lets say an email link. I noticed the info.plist has these references ${EXECUTABLE_NAME} can I define my own custom reference maybe?

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• Visual Studio 2010, using VB.NET. Intellisense does not recognize new property until I recompile

  - by Velika

  I have an ASP.NET VB.NET web project that references a VB.NET class library. I add a new property to a class in the class library, then, from the web app, I expect to be able to use it immediately w/o errors and with full intellisense. It used to work in 2008. When I compile the class library, it becomes available but not until. Was this nice feature taken away, perhaps in the interest of speed?

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• Trying to set the message-id, in-reply-to, etc... in ActionMailer

  - by Ryan

  I'm working on an app that needs to be able to send out email updates and then route the reply back to the original item. All emails will come to a single address (this can't change unfortunately), and I need to be able to determine where they go. My initial thought was setting the message-id for the item so that it comes back as a References header. any ideas on how to accomplish this with ActionMailer?

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• Programmatically determining space available from UNC Path

  - by LBushkin

  Is there a programmatic API for determining available space on NAS sotrage from a UNC path? I looked through the WMI documentation and it wasn't clear that this is possible. A code example and references to the relevant API calls would be much appreciated.

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• How to run & create a dll files.

  - by Gopal

  Using Visual Studio 2005 I download open source code from one site, when i try to run the source code, it showing error like Namespace & assembly references.... What are the procedure i have to do for this kind of errors.... And also i want to create a dll file by using this code. For Dll what are the procedure need to do? Need Help.

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• How does a portable Thread Specific Storage Mechanism's Naming Scheme Generate Thread Relative Uniqu

  - by Hassan Syed

  A portable thread specific storage reference/identity mechanism, of which boost/thread/tss.hpp is an instance, needs a way to generate a unique keys for itself. This key is unique in the scope of a thread, and is subsequently used to retrieve the object it references. This mechanism is used in code written in a thread neutral manner. Since boost is a portable example of this concept, how specifically does such a mechanism work ?

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• Where is the definition of Global_NS in a BizTalk schema?

  - by SteveC

  I'm trying to use a distinguished property but I get an error "Cannot implicitly convert type ... to Global_NS ... " I've googled/bing'ed but I've found only 4 references, none of which help I can't see anywhere that this is set :-( I've been trying to remove the tempuri namespaces from a WCF service and all seemed OK, until I tried to access a distinguished property

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• Canceling BackgroundWorker within the Thread

  - by Mike Wills

  I have a longer running multi-step process using BackgroundWorker and C#. I need to be sure that each step is completed successfully before moving on to the next step. I have seen many references to letting the BackgroundWorker catch errors and canceling from clicking on a Cancel button, but I want to check for an error myself and then gracefully end the process. Do I treat it just like someone clicked the cancel button, or is there another way?

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• suggestion for \cite in emacs with auctex

  - by voodoomsr

  Hi, i would like to now how can i get the suggestion when i do a \cite in emacs-auctex. The minibuffer tells me when i do C-c [ that "No valid bibliography in this document, and no default available". So how can i set this default?, i have a separated file with my bibtex references that is call by a master document, and i want the suggestion for any of the other files included.

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• JS and Rails site wide announcements

  - by pcasa

  Tried doing http://davidwparker.com/2008/09/17/site-wide-announcements-in-rails-using-jquery-jgrowl/ Am really bad with JS. Think I am messing up on the last part where it says "This code goes in your application.js file (somewhere in $(function){ //here })" Am I not suppose to do a link_to_function and create a function with this code that references that link? Really lost on this one.

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• Why the proliferation of open source licenses?

  - by dwj

  Is the proliferation of open source licenses just another example of programmers living NYI (Not Invented Here) syndrome? I know there are some big differences between some of the big licenses (e.g., GPL, Apache, BSD) but when you start looking to see many projects creating their own licenses. Why? References: http://en.wikipedia.org/wiki/Open_source_licenses http://developer.kde.org/documentation/licensing/licenses_summary.html

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• Auto convert java source to use generic rather than raw types

  - by Sam

  Is there a way/tool to auto convert Java source code from using raw types to using generic types? I have some legacy code with 677 references to raw types: ArrayList 47 Vector 420 Hashtable 61 Enumeration 64 Class 7 Iterator 78 TOTAL 677 Now I could manually look through the code to infer the generic types and replace, but that is going to take a long time.

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• Trying to update an MVC 1.0 project to MVC 2.0

  - by Cptcecil

  I'm trying to update my project to MVC 2.0 from MVC 1.0. I've removed the references for System.Web.MVC to the newer versions. I'm getting an exception from the HTTPContext which reads "CurrentNotification = 'HttpContext.Current.CurrentNotification' threw an exception of type 'System.PlatformNotSupportedException'". What other binaries do I need to update a reference to, to get my project to work again?

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• Which programming languages support constant methods?

  - by Derek Mahar

  Which programming languages other than C++ support the concept of a constant class method? That is, what languages allow the programmer to constrain a method in such a way that it is guaranteed not to change the state of an object to which the method is applied? Please provide examples or references in your answer.

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• Java and C++ on Stack Unwinding issue

  - by sahs-i-muhterem

  As far as I know, in case of an uncaught exception, C++ destroys the local variables immediately, Java releases the references and leaves the rest for the garbage collector. Is this right? What exactly is the difference between Java and C++ on this issue? in other words, which of these two languages is considered better in terms of stack unwinding issue? :)

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• Edge detection using wavelet

  - by cheoma

  I had done Edge detection using wavelet transform using thus steps changing the image to Gray scale decomposing the image using dwt2(discrete wavelet transform,Haar wavelet filter ) in to horizontal,vertical,diagonal and approximation(detail) further decomposing the horizontal part threshold (global threshold like canny Edge detection ) i got the edge but i got a problem while locating the edge to complete image to mean recovering original image using only the Edges so i need help concerning this either in concept ,mat lab code or references I hope i will get your help soon

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• Tool for debugging KVO/Bindings in Cocoa

  - by Raphael Sebbe

  Is there any tool to log current observers of a given object, in the spirit of what "gdb info gc-roots" does? I found "gdb info gc-references" could do that (sort of) as a by-product of its original purpose, but that won't work with non garbage collected apps. Thanks!

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• What's the standard algorithm for syncing two lists of objects?

  - by Oliver Giesen

  I'm pretty sure this must be in some kind of text book (or more likely in all of them) but I seem to be using the wrong keywords to search for it... :( A common task I'm facing while programming is that I am dealing with lists of objects from different sources which I need to keep in sync somehow. Typically there's some sort of "master list" e.g. returned by some external API and then a list of objects I create myself each of which corresponds to an object in the master list. Sometimes the nature of the external API will not allow me to do a live sync: For instance the external list might not implement notifications about items being added or removed or it might notify me but not give me a reference to the actual item that was added or removed. Furthermore, refreshing the external list might return a completely new set of instances even though they still represent the same information so simply storing references to the external objects might also not always be feasible. Another characteristic of the problem is that both lists cannot be sorted in any meaningful way. You should also assume that initializing new objects in the "slave list" is expensive, i.e. simply clearing and rebuilding it from scratch is not an option. So how would I typically tackle this? What's the name of the algorithm I should google for? In the past I have implemented this in various ways (see below for an example) but it always felt like there should be a cleaner and more efficient way. Here's an example approach: Iterate over the master list Look up each item in the "slave list" Add items that do not yet exist Somehow keep track of items that already exist in both lists (e.g. by tagging them or keeping yet another list) When done iterate once more over the slave list Remove all objects that have not been tagged (see 4.) Update Thanks for all your responses so far! I will need some time to look at the links. Maybe one more thing worthy of note: In many of the situations where I needed this the implementation of the "master list" is completely hidden from me. In the most extreme cases the only access I might have to the master list might be a COM-interface that exposes nothing but GetFirst-, GetNext-style methods. I'm mentioning this because of the suggestions to either sort the list or to subclass it both of which is unfortunately not practical in these cases unless I copy the elements into a list of my own and I don't think that would be very efficient. I also might not have made it clear enough that the elements in the two lists are of different types, i.e. not assignment-compatible: Especially, the elements in the master list might be available as interface references only.

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• getting close to real-time with hadoop

  - by Akhil

  I need some good references for using Hadoop for real-time systems like searching with little response time. I know hadoop has its overhead of hdfs, but whats the best way of doing this with hadoop.

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• How to use OUTPUT statement inside a SQL trigger?

  - by Jeff Meatball Yang

  From MSDN: If a statement that includes an OUTPUT clause is used inside the body of a trigger, table aliases must be used to reference the trigger inserted and deleted tables to avoid duplicating column references with the INSERTED and DELETED tables associated with OUTPUT. Can someone give me an example of this? I'm not sure if this is correct: create trigger MyInterestingTrigger on TransactionalTable123 AFTER insert, update, delete AS declare @batchId table(batchId int) insert SomeBatch (batchDate, employeeId) output SomeBatch.INSERTED.batchId into @batchId insert HistoryTable select b.batchId, i.col1, i.col2, i.col3 from TransactionalTable123.inserted i cross join @batchId b

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