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• Which types use a FileNameEditor in a PropertyGrid?

  - by Wolfgang

  I need to change the editor for a property attached to a .net PropertyGrid, but I cannot set the Editor attribute of that property, because the property was generated by a tool, including all attributes. The desired editor is System.Windows.Forms.Design.FileNameEditor I can find many tutorials on the web to assign this editor to string properties by setting the editor attribute, but I cannot set the editor attribute in this case. However, I can advise the code generation tool to behave such that the string property which I want to be edited with the FileNameEditor becomes converted to another property with different type. In order to do so, I would need to know which type is edited by the FileNameEditor as default. I didn't find any list on the web which would tell me for a given editor which types employ this editor automatically when displayed in a PropertyGrid.

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• Git - switching between branches in the middle of work

  - by Art

  For various reasons (code review mostly) I need to switch from current development branch to other branches quite often. Currently, I use either 'git stash' to shelve the uncommitted changes, checkout other branch, then switch back and do 'git stash apply' However, sometimes I'd have some newly added files there, which are not tracked. Unfortunately, stashing does not affect them. In this case I'd have to add them to the index and stash. What I am looking here for is a workflow where I'd have to perform a minimal set of actions to switch the branches, preferably avoiding adding of files into the index.

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• 'Error serializing body'. Problem calling Fedex webservice through .NET 3.5

  - by Simon_Weaver

  I'm using Fedex's web services and getting an annoying error right up front before I can actually get anywhere. There was an error in serializing body of message addressValidationRequest1: 'Unable to generate a temporary class (result=1). error CS0030: Cannot convert type 'FedEx.InterOp.AddressValidationServiceReference.ParsedElement[]' to 'FedEx.InterOp.AddressValidationServiceReference.ParsedElement' error CS0029: Cannot implicitly convert type 'FedEx.InterOp.AddressValidationServiceReference.ParsedElement' to 'FedEx.InterOp.AddressValidationServiceReference.ParsedElement[]' '. Please see InnerException for more details. I'm using .NET 3.5 and get a horrible named class generated for me (I'm not sure why it isn't just AddressValidationService): AddressValidationPortTypeClient addressValidationService = new ...; on this class I make my web service call: addressValidationService.addressValidation(request); This is when I get this error. The only references I can find to this error come from ancient 1.1 projects. In my case my DLL has references to System.Web and System.Web.Services which seemed to be an issue back then.

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• Java: Local Enums

  - by bruno conde

  Today, I found myself coding something like this ... public class LocalEnums { public LocalEnums() { } public void foo() { enum LocalEnum { A,B,C }; // .... // class LocalClass { } } } and I was kind of surprised when the compiler reported an error on the local enum: The member enum LocalEnum cannot be local Why can't enums be declared local like classes? I found this very useful in certain situations. In the case I was working, the rest of the code didn't need to know anything about the enum. Is there any structural/design conflict that explains why this is not possible or could this be a future feature of Java?

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• Where does form processing logic belong in a MVC web application?

  - by AdamTheHutt

  In a web-based application that uses the Model-View-Controller design pattern, the logic relating to processing form submissions seems to belong somewhere in between the Model layer and the Controller layer. This is especially true in the case of a complex form (i.e. where form processing goes well beyond simple CRUD operations). What's the best way to conceptualize this? Are forms simply a kind of glue between models and controllers? Or does form logic belong squarely in the M or C camp? EDIT: I understand the basic flow of information in an MVC application (see chills42's answer for a summary). My question is where the form processing logic belongs - in the controller, in the model, or somewhere else?

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• Efficiency of checking for null varbinary(max) column ?

  - by Moe Sisko

  Using SQL Server 2008. Example table : CREATE table dbo.blobtest (id int primary key not null, name nvarchar(200) not null, data varbinary(max) null) Example query : select id, name, cast((case when data is null then 0 else 1 end) as bit) as DataExists from dbo.blobtest Now, the query needs to return a "DataExists" column, that returns 0 if the blob is null, else 1. This all works fine, but I'm wondering how efficient it is. i.e. does SQL server need to read in the whole blob to its memory, or is there some optimization so that it just does enough reads to figure out if the blob is null or not ? (FWIW, the sp_tableoption "large value types out of row" option is set to OFF for this example).

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• Sample the deltas between values using boost::accumulators

  - by Checkers

  I have a data set with N integers (say, 13, 16, 17, 20) where each next sample is incremented by some value (3, 1, 3 in this case) and I want to use boost::accumulators::accumulator_set to find various statistics of the second sequence. I want to be able to do something like this: accumulator_set< double, features< tag::mean > > acc; ... acc(13); acc(16); acc(17); acc(20); ...BUT sampling the differences instead of the actual values. How can I do that with accumulator_set without keeping track of the last value manually?

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• Rails: Skinny Controller vs. Fat Model, or should I make my Controller Anorexic?

  - by Nick Gorbikoff

  I know similar questions have been answered before - such as: Where should logic go, where to do certain tasks, etc. But I have a more specific question - How far should I take this axiom: "keep your controller skinny, make your model fat!" Here is an example: For instance let's say I have multiple source of verification data. A good example would be a VIN number - I can verify it against, manufacturers data source, DMV's data source, also my local databases - to see what I have on record. So I have a model called Vin and vins_controller. Inside the model I have 5 methods: check_against_local_db, check_against_dmv, check_against_car_maker_1, check_against_car_maker_2, etc. In my controller keeping with the REST, in action show - I have a simple case statement which looks at the params[:source], and based on source specified - will call specific check method. Now here is the question: Should I leave the logic that governs which data source to call in controller or should I move it to model and then in controller just do something like check_vin(source, vin)? Should I make my controller anorexic?

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• std::string == operator not working

  - by Paul

  Hello, I've been using std::string's == operator for years on windows and linux. Now I am compiling one of my libraries on linux, it uses == heavily. On linux the following function fails, because the == returns false even when the strings are equal (case sensitive wise equal) const Data* DataBase::getDataByName( const std::string& name ) const { for ( unsigned int i = 0 ; i < m_dataList.getNum() ; i++ ) { if ( m_dataList.get(i)->getName() == name ) { return m_dataList.get(i); } } return NULL; } The getName() method is declared as follows virtual const std::string& getName() const; I am building with gcc 4.4.1 and libstdc++44-4.4.1. Any ideas? it looks perfectly valid to me. Paul

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• Best way to store sales tax information

  - by Seph

  When designing a stock management database system (sales / purchases) what would be the best way to store the various taxes and other such amounts? A few of the fields that could be saved are: Unit price excluding tax Unit price including tax Tax per item Total excluding tax (rounded to 2 decimals) Total including tax (rounded to 2 decimals) Total tax (rounded to 2 decimals) Currently the most reasonable solution so far is storing down (roughly) item, quantity, total excluding tax (rounded) and the total tax (rounded). Can anyone suggest some better way of storing this details for a generic system? Also, given the system needs to be robust, what should be done if there were multiple tax values (eg: state and city) which might need to be separated, in this case a separate table would be in order, but would it be considered excessive to just have a rowID and some taxID mapping to a totalTax column?

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• Make MySQL database replication always use the most free node?

  - by Chad Johnson

  We started using Multi-Master Replication Manager for MySQL, and I am wondering whether it is possible to to treat this setup like multi-symmetric processing: a process pops off the process queue, and the node (in this case a server) that is most free is selected for the job. It seems that what happens is, the service switches to a slave ONLY when it mysqld crashes or goes away. Is there a way to make database replication for MySQL act in more of a distributed manner? Maybe there is other software besides MMM that can do this? Is there a way to switch the reader role to another server whene mysqld slows down (rather than just when it fails)?

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• What is the equivalent to Java's canvas object in C#?

  - by Winston

  I'm working on creating a basic application that will let a user draw (using a series of points) and I plan to do something with these points. If this were Java, I think I would probably use a canvas object and some Java2D calls to draw what I want. All the tutorials I've read on C#/Drawing involve writing your own paint method and adding it to the paint event for the form. However, I'm interested in having some traditional Form controls as well and I don't want to be drawing over them. So, is there a "Canvas" object where I can constrain what I'm drawing on? Also, is WinForms a poor choice given this use case? Would WPF have more features that would help enable me to do what I want? Or Silverlight?

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• Right way to create [self]respawning app in python

  - by grapescan

  I am using jabber bot written in python to log some MUC talks. Sometimes it drops on some network or XMPP problems. In this case I have to start it again by myself. The goal is to make it "self-respawning". I have some variants about how to do it. Bot is one process. Another process monitors its activity and starts it if bot died. Main process spawns bot subprocess and controls it. Also I think daemonizing bot process is useful here. Platform is Linux, as you could guess. What is the right way to solve this problem?

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• Chain LINQ IQueryable, and end with Stored Procedure

  - by Alex

  I'm chaining search criteria in my application through IQueryable extension methods, e.g.: public static IQueryable<Fish> AtAge (this IQueryable<Fish> fish, Int32 age) { return fish.Where(f => f.Age == age); } However, I also have a full text search stored procedure: CREATE PROCEDURE [dbo].[Fishes_FullTextSearch] @searchtext nvarchar(4000), @limitcount int AS SELECT Fishes.* FROM Fishes INNER JOIN CONTAINSTABLE(Fishes, *, @searchtext, @limitcount) AS KEY_TBL ON Fishes.Id = KEY_TBL.[KEY] ORDER BY KEY_TBL.[Rank] The stored procedure obviously doesn't return IQueryable, however, is it possible to somehow limit the result set for the stored procedure using IQueryable's? I'm envisioning something like .AtAge(5).AboveWeight(100).Fishes_FulltextSearch("abc"). In this case, the fulltext search should execute on a smaller subset of my Fishes table (narrowed by Age and Weight). Is something like this possible? Sample code?

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• How to build a setup package for a desktop application using SQL CE 3.5 and Entity Framework?

  - by Emad

  I am having a WPF desktop application that uses SQL CE (compact edition 3.5 ) and using the Entity Framework as a Datalayer. As It turned out in (http://support.microsoft.com/default.aspx?scid=kb;en-us;958478&sd=rss&spid=2855 ) and (http://social.msdn.microsoft.com/Forums/en-US/sqlce/thread/b6bac277-cf66-4c74-a0b3-e48abedbd161/ ) There Is some problem with the Entity Framework and SQL CE and I had to get the hotfix (basically a new build of the SQL CE called 3.5.1) My problem now is how to build a setup package in order to make it work in case some users already had the SQL CE 3.5 installed on their machines? I have included the DLLs directly in the application but when the sql ce is installed, its DLLs are in the GAC and have precedence over the local ones and the application crashes. I need the build a setup that would work "even if" the user already had the old buggy version.

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• What is a custom collection?

  - by Win Coder

  A Group of objects. However i am having confusion in the following case. A sample class Class A { public string; } Class A_list { public A[] list; public A_list(A[] _list) { list = new A[_list.length]; for (int i = 0; i < _list.Length; i++) { list[i] = _list[i]; } } } static void Main(String[] args) { A[] names = new A[3] { new A("some"), new A("another"), new A("one"), }; A_list just_an_object = new A_list(names); } Which of the above is a custom collection the array or the object that holds array as a field or are both custom collections.

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• how to get SSRS 2008 R2 to export/render in Excel 2007 format?

  - by James Manning

  I have a report that has ~1k columns and ~17k rows and I'm trying to render it to Excel 2007 with SSRS 2008 R2 Nov CTP. SSRS team members have mentioned in multiple places that Excel 2007 format is included in 2008 R2, for instance: http://social.msdn.microsoft.com/Forums/en-US/sqlreportingservices/thread/69545568-73cb-4f4c-8f35-44472ba6d013 Now, it's certainly possible that it just hasn't made it into the product yet (at least as of Nov CTP), and if that's the case, that would be good to know, too (and ideally when it would be in the product). The repro report and data (along with attempts showing the existing interface still does Excel 2003 format) are attached to the bottom of this blog post, FWIW: http://cid-456117cf53a42144.spaces.live.com/default.aspx

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• Any open source back test engine using bloomberg tick-by-tick data?

  - by Ian Xu

  I have a back test on index futures to do. I've finished the test on 1-minute OHLC data and the result is OK. Further I want to opt our tick-by-tick data downloaded from Bloomberg. I have browsed the internet and found that several trading platforms are available for such function but Bloomberg is not in the data source providers list. So I think these are not suitable for my case. I'm wondering whether there is any open-source engine that I may embed to finish the test?

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• How to browse a Matrix returned by the OpenCV2.0 Canny() function ?

  - by user290613

  Hi all, I've been browsing the web to get an answer but no way to put my hand on it. I call the Canny function that fills me a matrix Canny(src, dst, 220, 299, 3 ); the dst variable is now a Matrix that is according to me of type CV_8UC1, 8bit, 1channel. Now I would like to browse this matrix according to rows and columns, so there was a trick that I've seen on stackoverflow dst.at<uchar*>(3, 5) In my case it crashes. (Assertion Failed, unknown function, cxmat.hpp line 450) My matrix information are myMatrix.width() = 181 myMatrix.height() = 65 One more thing, when I do std::cout << dst.depth() << std::endl; It always retrieves me 0 and not 8 (which I guess Im suppose to get) Thank you very much for all who will reply,

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• Flash AS3 Coloring Book - Movieclip only clickable in certain spots (Event Listeners)

  - by kilrizzy

  I am working on a coloring book and have a movieclip (outlines) containing many movieclips that can be changed to whatever color the user has selected. However it seems like some of the movieclips can be clicked anywhere and work great, and others you need to click a certain spot for it to color in. I have an example here: http://jeffkilroy.com/hosted/softee/coloring.html Notice the three sections of the icecream (top, middle, bottom). The middle is clickable from anywhere inside the movieclip, however the top and especially bottom require you to click on specific spots in order for you to activate the event listener. Not sure if it is a depth issue because I would assume if that is the case it would activate at least a different movieclip but it just seems nothing happens at all. Any help would be appreciated, I also have the source located here: Source CS4 Source CS3

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• How to create a VS2010 extension that uses Language Services

  - by Hades32

  Creating extensions got much easier with Vs2010, but this seems not to be the case for everything... My aim: I wnat to make method calls and property uses of STATIC classes ITALIC. (Just like Eclipse and Java) I think I need to talk to the C# Language Service for this information, but searching for "Language Service" just yields results on how to CREATE one, not how to use one of the existing ones... To get this question a little more general: How do I get information about properties of the code (static/visibility etc) for using it in a VSX?

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• Service Call very slow if going through HttpHandler

  - by JohnIdol

  I have a WCF client pointing to a WebSphere service. All is good in normal situation except when my calls to the service originate from an HttpHandler - in this case the calls are extremely slow (it takes up to 10 times longer). If I send the exact same envelopes through Soap-UI or without an HttpHandler it's all good. If the envelope is the same the only thing left is the HttpHeader. Would the fact that I am going through an HttpHandler cause changes HttpHeaders compared to normal scenarios? What should I be looking for and is there some config setting that might do the trick? Any help appreciated!

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• How do I migrate a ManyToOne to a ManyToMany relationship in Hibernate?

  - by spderosso

  I have a instance field of a class X that is mapped using Hibernate as a Many to One relationship. E.g: public class X{ ... @ManyToOne(optional=false) private Y iField; ... } That is correctly working with a particular schema. I know want to change this instance field iField to a List and a Many to Many relationship. public class X{ ... @ManyToMany(optional=false) private List<Y> iField; ... } What steps should I follow? Do I have to change the schema? in which way? In case you need more info let me know. Thanks!

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• Need details about applications that are running on Windows Azure

  - by veda

  I have an application which requires large amount of data storage (say some PB) and computing resources. Instead of going for clusters, I am planning to propose to use Windows Azure Cloud for this application. I have gone through white papers of Windows Azure and have collected some details about Azure. But I feel that is not substantial. I need to do some case study about applications that are running on the azure and that uses azure storage efficiently. I looked for several research paper in related to performance of the applications in Windows Azure. But as Azure was quite new, I wasn't able to find any. Now, I am looking for some white papers/details regarding application that uses azure storage to substantiate my proposal. I also need to understand the windows azure storage architecture and virtual machine architecture. Do anyone know some research papers or details or blogs or something related to these topics.

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• How do I convert CamelCase into human-readable names in Java?

  - by Frederik

  I'd like to write a method that converts CamelCase into a human-readable name. Here's the test case: public void testSplitCamelCase() { assertEquals("lowercase", splitCamelCase("lowercase")); assertEquals("Class", splitCamelCase("Class")); assertEquals("My Class", splitCamelCase("MyClass")); assertEquals("HTML", splitCamelCase("HTML")); assertEquals("PDF Loader", splitCamelCase("PDFLoader")); assertEquals("A String", splitCamelCase("AString")); assertEquals("Simple XML Parser", splitCamelCase("SimpleXMLParser")); assertEquals("GL 11 Version", splitCamelCase("GL11Version")); }

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