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  • How do I pass a function to NUnit Throws.Constraints?

    - by Serge Belov
    I'm trying to write some NUnit tests in F# and having trouble passing a function to the ThrowsConstraint. A distilled (non)working sample is below. open System.IO open NUnit.Framework [<TestFixture>] module Example = [<Test>] let foo() = let f = fun () -> File.GetAttributes("non-existing.file") Assert.That(f, Throws.TypeOf<FileNotFoundException>()) This compiles just fine but I get the following from the NUnit test runner: FsTest.Tests.Example.foo: System.ArgumentException : The actual value must be a TestDelegate but was f@11 Parameter name: actual While I'm able to work around the problem using ExpectedException attribute, my question is what is the correct way of using an F# function in this situation?

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  • C++/CLI value class constraint won't compile. Why?

    - by Simon
    Hello, a few weeks ago a co-worker of mine spent about two hours finding out why this piece of C++/CLI code won't compile with Visual Studio 2008 (I just tested it with Visual Studio 2010... same story). public ref class Test { generic<class T> where T : value class void MyMethod(Nullable<T> nullable) { } }; The compiler says: Error 1 error C3214: 'T' : invalid type argument for generic parameter 'T' of generic 'System::Nullable', does not meet constraint 'System::ValueType ^' C:\Users\Simon\Desktop\Projektdokumentation\GridLayoutPanel\Generics\Generics.cpp 11 1 Generics Adding ValueType will make the code compile. public ref class Test { generic<class T> where T : value class, ValueType void MyMethod(Nullable<T> nullable) { } }; My question is now. Why? What is the difference between value class and ValueType?

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  • How do I write an overload operator where both arguments are interface

    - by Eric Girard
    I'm using interface for most of my stuff. I can't find a way to create an overload operator + that would allow me to perform an addition on any objects implementing the IPoint interface Code interface IPoint { double X { get; set; } double Y { get; set; } } class Point : IPoint { double X { get; set; } double Y { get; set; } //How and where do I create this operator/extension ??? public static IPoint operator + (IPoint a,IPoint b) { return Add(a,b); } public static IPoint Add(IPoint a,IPoint b) { return new Point { X = a.X + b.X, Y = a.Y + b.Y }; } } //Dumb use case : public class Test { IPoint _currentLocation; public Test(IPoint initialLocation) { _currentLocation = intialLocation } public MoveOf(IPoint movement) { _currentLocation = _currentLocation + intialLocation; //Much cleaner/user-friendly than _currentLocation = Point.Add(_currentLocation,intialLocation); } }

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  • Any way to allow classes implementing IEntity and downcast to have operator == comparisons?

    - by George Mauer
    Basically here's the issue. All entities in my system are identified by their type and their id. new Customer() { Id = 1} == new Customer() {Id = 1}; new Customer() { Id = 1} != new Customer() {Id = 2}; new Customer() { Id = 1} != new Product() {Id = 1}; Pretty standard scenario. Since all Entities have an Id I define an interface for all entities. public interface IEntity { int Id { get; set;} } And to simplify creation of entities I make public abstract class BaseEntity<T> : where T : IEntity { int Id { get; set;} public static bool operator ==(BaseEntity<T> e1, BaseEntity<T> e2) { if (object.ReferenceEquals(null, e1)) return false; return e1.Equals(e2); } public static bool operator !=(BaseEntity<T> e1, BaseEntity<T> e2) { return !(e1 == e2); } } where Customer and Product are something like public class Customer : BaseEntity<Customer>, IEntity {} public class Product : BaseEntity<Product>, IEntity {} I think this is hunky dory. I think all I have to do is override Equals in each entity (if I'm super clever, I can even override it only once in the BaseEntity) and everything with work. So now I'm expanding my test coverage and find that its not quite so simple! First of all , when downcasting to IEntity and using == the BaseEntity< override is not used. So what's the solution? Is there something else I can do? If not, this is seriously annoying. Upadate It would seem that there is something wrong with my tests - or rather with comparing on generics. Check this out [Test] public void when_created_manually_non_generic() { // PASSES! var e1 = new Terminal() {Id = 1}; var e2 = new Terminal() {Id = 1}; Assert.IsTrue(e1 == e2); } [Test] public void when_created_manually_generic() { // FAILS! GenericCompare(new Terminal() { Id = 1 }, new Terminal() { Id = 1 }); } private void GenericCompare<T>(T e1, T e2) where T : class, IEntity { Assert.IsTrue(e1 == e2); } Whats going on here? This is not as big a problem as I was afraid, but is still quite annoying and a completely unintuitive way for the language to behave. Update Update Ah I get it, the generic implicitly downcasts to IEntity for some reason. I stand by this being unintuitive and potentially problematic for my Domain's consumers as they need to remember that anything happening within a generic method or class needs to be compared with Equals()

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  • QGLWidget + QGraphicsScene + QGraphicsView problem

    - by matekm
    Hi! I would like to create a simple thumbnail viewer using QGLWidget, QGraphicsScene and QGraphicsView. And I have a problem with placing QGLWidget on QGraphicsScene. The code is similar to this: QGraphicsScene *testScene = new QGraphicsScene (0, 0, 400, 400, 0); QGLWidget *testWidget1 = new QGLWidget(); testWidget1->renderText("Test text1"); QGLWidget *testWidget2 = new QGLWidget(); testWidget2->renderText("Test text2"); testScene->addWidget(testWidget1); testScene->addWidget(testWidget2); QGraphicsView *testView = new QGraphicsView(); testView->setScene(testScene); testView->show() It is possible to place few QGLWidgets on QGraphicsScene/QGraphicsView? Where I doing something wrong? Is there any other component on which I could embed QGLWidgets and show them on the screen? Thanks for help

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  • Create Generic Class Instance from Static Method in a Derived Class

    - by user343547
    I have a class in C# with a template and static method similar to class BClass<T> { public static BClass<T> Create() { return new BClass<T>(); } } From this I derive a class and specify a template parameter to the base class class DClass : BClass<int> { } A problem occurs when I try to use the static method to create an instance of D class Program { static void Main(string[] args) { DClass d = DClass.Create(); } } Gives a compiler error "Cannot implicitly convert type 'Test.BClass<int ' to 'Test.DClass'." Adding the below cast leads to a runtime casting exception. DClass d = (DClass)DClass.Create(); Is there any succint way to allow the static method to create instances of the derived class? Ideally I would like the equivalent of a c++ typedef and I don't want the below syntax (which does work). BClass<int> d = DClass.Create();

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  • Writing iPhone apps on linux - What tools do you need

    - by Sia.G
    Hello. I wanted to know if it's possible to WRITE and COMPILE/TEST iPhone apps on a linux platform. I've been on google for a couple of days now, and people either talk about "Mac OS X only!", or "Develop jailbroke apps on Linux". My dev partner has a mac and has a certificate to sign the apps. I don't have a mac, but I will be doing most of the development. So what I want to do is simply develop/test the app in linux, and when it's finished, simply hand over the code to him, who will then compile the finalized app and sign it ready for submission to the app store. Could anyone tell me what linux tools I would need to accomplish this?

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  • How to log the output from cmd tree command using Apache Ant exec task?

    - by S.N
    Hi, I am trying to log the output from cmd tree command using ant with the following: <exec dir="${basedir}" executable="cmd" output="output.txt"> <arg value="tree" /> </exec> However, I am seeing the following in the "output.txt": Microsoft Windows XP [Version 5.1.2600] (C) Copyright 1985-2001 Microsoft Corp. When I run the command in the windows cmd: C:\tree>tree I get something like: C:\tree +---test +---test Can anyone tell me how to write a Ant script to print the tree structure in to a file?

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  • RewriteRule being greedy

    - by lardlad
    I have been looking for an answer for a few hours now, so sorry if this was asked a ton of times, I missed it. I basically want to make a rewrite to ignore the first directory. That first dir in the path will be different so I thought I could use a regex. But my regex is matching all the way to the file name: RewriteRule ^([a-z]+)?/(.+)$ $2 [L] this works if I am one level deep: http://test.domain.com/one/index.php I get the actual index page of the root. Which is what I want. but if I were to go deeper: http://test.domain.com/one/two/index.php I get a message saying /index.php was not found. So it seems my regex is not stopping after the last [a-z]. I appreciate any help. This is Apache2 if that matters at all.

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  • Sending mail using CDO JavaScript error - Server is undefined

    - by Rotem
    Hi, I got this code to send email using SMTP server, I tried many configuration of it that I found online, also VBscript similar code, and non of it is working. I want to focus on this code, when I'm opening the HTA I'm getting error in line 8, says 'Server is undefined', What should I do to define it? var cdoConfig = Server.CreateObject("CDO.Configuration"); cdoConfig.Fields("cdoSMTPServerName") = "194.90.9.22"; var cdoMessage = Server.CreateObject("CDO.Message"); cdoMessage.Configuration = cdoConfig; var cdoBodyPart = cdoMessage.BodyPart; cdoMessage.To = "[email protected]"; cdoMessage.From = "[email protected]"; cdoMessage.Subject = "CDO Test in JScript"; cdoMessage.TextBody = "This is a test email sent using JScript."; cdoMessage.send(); Thanks, Rotem

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  • How do you set up your JScript (NOT JScript.NET) development environment?

    - by jJack
    In my environment, if I create a class in JScript syntax: class test{ } and then save it to a file named "test.js" and run it with wscript, I get a Microsoft JScript "Syntax error" at line 1. However, if I simply, say, write a function: function getInput() { var wshell = WScript.CreateObject("WScript.Shell"); wshell.Popup ("Do you want to continue?"); return userInput } getInput() and run it the same way, it works. Hopefully, there is something fundamentally wrong with my class definition. If that is the case, I am excited to find out.

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  • Embedded MongoDB when running integration tests

    - by seanhodges
    My question is a variation of this one. Since my Java Web-app project requires a lot of read filters/queries and interfaces with tools like GridFS, I'm struggling to think of a sensible way to simulate MongoDB in the way the above solution suggests. Therefore, I'm considering running an embedded instance of MongoDB alongside my integration tests. I'd like it to start up automatically (either for each test or the whole suite), flush the database for every test, and shut down at the end. These tests might be run on development machines as well as the CI server, so my solution will also need to be portable. Can anyone with more knowledge on MongoDB help me get idea of the feasibility of this approach, and/or perhaps suggest any reading material that might help me get started? I'm also open to other suggestions people might have on how I could approach this problem...

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  • Writing to a .plist file

    - by sg
    I have a .plist with 2 key values in it. It is of type Dictionary. I am trying to write value to one of the key values. What's wrong with the code below? I also tried using type "Array". That option also does not work. How can I get it to work using Dictionary & also Array? Anyone has working code example? Thanks. I would appreciate any help. NSString *filePath = @"myprefs.plist"; NSMutableDictionary* plistDict = [[NSMutableDictionary alloc] initWithContentsOfFile:filePath]; [plistDict setValue:@"[email protected]" forKey:@"Email"]; [plistDict writeToFile:filePath atomically: YES];

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  • can you use proxies to do load/stress testing on a server, with proxy serving as a sort of mirror?

    - by EndangeringSpecies
    suppose I want to test a server's and its web application's ability to handle many simultaneous connections well and show decent latency. So ideally I would want a thousand machines to bombard it with usage requests, but that's not practicable. So instead, can I just make a testing script with a thousand threads to run on the same server and have them perform the testing, connecting to the server via a geographically far-away proxy? My reasoning here is that the signal will have to travel realistically big distances to the proxy and back, so that sort of emulates the reality of real clients accessing the server. Then again, to take this one step further, are there prepackaged emulators/frameworks that could perform a similar test without using internet at all, just simulating the latency of the network, realistically creating all the socket connections and other resource intensive stuff etc?

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  • Eclipse, Android ndk, source files, and library project dependencies

    - by Android Noob
    In Microsoft Visual Studio 2010, it is possible to create a Solution with multiple projects and set dependencies between projects. I'm trying to figure out if the same thing can be done using Eclipse via the NDK. More specifically, I want to know if it is possible to create C source files in an ordinary Android project that can reference C header files in an Android library project. For example: Android library project: Sockets Ordinary Android project: Socket_Server Sockets contains all the C header/source files that are needed to do socket I/O. Socket_Server contains test code that makes calls to the functions that are defined in Sockets library project. This test code requires a header file that contains the function declaration of all API calls. I already set the library dependencies between the projects via: Properties > Android > Library > Add

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  • do we need to escape the character '<'

    - by Ozkan
    In C# ASP.NET, if we have the characters < or in a string. Do we need to escape it like: string a = "\<test\>abcdef\</test\>" because this string will be send to an external method via webservices. And in that method, it will be converted to a some kind of xml file. contentHtml = "<?xml version=\"1.0\" encoding=\"utf-16\"?>" + contentHtml; content_ws.AddContent(contentHtml); //AddContent() method is a external method (via webservices) Thx for help

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  • Unwanted space between divs - HTML, CSS

    - by Nikalas Haufe
    Hi, hows it going, I have searched through the forums and good old google and have found many answers but non seem to work on my page. Anyway here is the question, I have 2 divs that are positioned side by side, and I wish to get rid of the whitespace www.blisshair.com.au/test.html :(http://www.blisshair.com.au/test.html) I want to the black from the "link 1" to join to the main content in the center, Any help would be greatly appreciated, Thank you. EDIT: Tried opening in Internet explorer 8 and it seems top exactly how I want it, besides the 2 bottom divs not lining up, Is it possible to do this with an UL and SPAN tags ? I am aiming for a tabbed look, for example, when you click on link 2, the background around link 2 goes black and the black color "flows" into the main content page, sorry if this doesnt make sense, early AM here :D Thanks again

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  • Accessing Password Protected Network Drives in Windows in C#?

    - by tkeE2036
    Hi Everyone, So in C# I am trying to access a file on a network, for example at "//applications/myapp/test.txt", as follows: const string fileLocation = @"//applications/myapp/test.txt"; using (StreamReader fin = new StreamReader(FileLocation)) { while(!fin.EndOfStream()){ //Do some cool stuff with file } } However I get the following error: System.IO.IOException : Logon failure: unknown user name or bad password. I figure its because I need to supply some network credentials but I'm not sure how to get those to work in this situation. Does anyone know the best way (or any way) to gain access to these files that are on a a password protected location? Thanks in advance!!

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  • Check result of AX_PYTHON_MODULE in configure.ac

    - by tmatth
    In using the m4_ax_python_module.m4 macro in configure.ac (AX_PYTHON_MODULE), one can know at configure time if a given module is installed. It takes two arguments, the module name, and second argument which if not empty, will lead to an exit, useful when the module is a must-have. In the case where you don't want a fatal exit, how do you test in configure.ac which modules were found or not? They output "yes" or "no" when configure is run, but that's all I've found so far. Basically If I have these lines in configure.ac: AX_PYTHON_MODULE(json,[]) AX_PYTHON_MODULE(simplejson,[]) How do I test which of the two modules were found? See http://www.gnu.org/software/autoconf-archive/ax_python_module.html#ax_python_module for documentation about this macro.

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  • Maven downloads have .lastUpdated as extension

    - by user303158
    I am a beginner to Eclipse and maven. I have an Eclipse setup with m2eclipse and subversive. I have imported a maven2 project from svn. But I get the error message that a whole bunch of artifacts are missing (for instance: Missing artifact org.springframework:spring-test:jar:3.0.1.RELEASE:test). If I look in my repository I see the jar files there but they have an extra extension .lastUpdated. Why is maven appending .lastUpdated to the jars? And more importantly: how can I fix this? Btw there is no mention of the type lastUpdated in my POMs.

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  • Can't inherit from auto_str without problems

    - by fret
    What I want to do is this: #include <memory> class autostr : public std::auto_ptr<char> { public: autostr(char *a) : std::auto_ptr<char>(a) {} autostr(autostr &a) : std::auto_ptr<char>(a) {} // define a bunch of string utils here... }; autostr test(char a) { return autostr(new char(a)); } void main(int args, char **arg) { autostr asd = test('b'); return 0; } (I actually have a copy of the auto_ptr class that handles arrays as well, but the same error applies to the stl one) The compile error using GCC 4.3.0 is: main.cpp:152: error: no matching function for call to `autostr::autostr(autostr)' main.cpp:147: note: candidates are: autostr::autostr(autostr&) main.cpp:146: note: autostr::autostr(char*) I don't understand why it's not matching the autostr argument as a valid parameter to autostr(autostr&).

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  • Java: design problem with private-final-int-value and empty constructor

    - by HH
    $ javac InitInt.java InitInt.java:7: variable right might not have been initialized InitInt(){} ^ 1 error $ cat InitInt.java import java.util.*; import java.io.*; public class InitInt { private final int right; //DUE to new Klowledge: Design Problem //I think having an empty constructor like this // is an design problem, shall I remove it? What do you think? // When to use an empty constructor? InitInt(){} public static void main(String[] args) { InitInt test = new InitInt(); System.out.println(test.getRight()); } public int getRight(){return right;} } Initialization problem with Constructor InitInt{ // Still the error, "may not be initialized" // How to initialise it? if(snippetBuilder.length()>(charwisePos+25)){ right=charwisePos+25; }else{ right=snippetBuilder.length()-1; } }

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  • Template function as a template argument

    - by Kos
    I've just got confused how to implement something in a generic way in C++. It's a bit convoluted, so let me explain step by step. Consider such code: void a(int) { // do something } void b(int) { // something else } void function1() { a(123); a(456); } void function2() { b(123); b(456); } void test() { function1(); function2(); } It's easily noticable that function1 and function2 do the same, with the only different part being the internal function. Therefore, I want to make function generic to avoid code redundancy. I can do it using function pointers or templates. Let me choose the latter for now. My thinking is that it's better since the compiler will surely be able to inline the functions - am I correct? Can compilers still inline the calls if they are made via function pointers? This is a side-question. OK, back to the original point... A solution with templates: void a(int) { // do something } void b(int) { // something else } template<void (*param)(int) > void function() { param(123); param(456); } void test() { function<a>(); function<b>(); } All OK. But I'm running into a problem: Can I still do that if a and b are generics themselves? template<typename T> void a(T t) { // do something } template<typename T> void b(T t) { // something else } template< ...param... > // ??? void function() { param<SomeType>(someobj); param<AnotherType>(someotherobj); } void test() { function<a>(); function<b>(); } I know that a template parameter can be one of: a type, a template type, a value of a type. None of those seems to cover my situation. My main question is hence: How do I solve that, i.e. define function() in the last example? (Yes, function pointers seem to be a workaround in this exact case - provided they can also be inlined - but I'm looking for a general solution for this class of problems).

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  • Change of a background image of a button on onclick event

    - by Alpan67
    Why does this not work ? In Firebug, when I click on the button, it always says to me that cambiaBandiera is not defined ... HELP Alex CSS ITA{ float:right; margin : 5px 85px; width:40px; height:40px; background : #FFFFFF url("../ITA_off.png") center center no-repeat; border:0; } JAVASCRIPT (in HEAD) style type="text/javascript" function cambiaBandiera() { test=document.getElementById("ITA"); test.style.backgroundImage="url('../ITA_on.png')"; } /style and this is HTML div id="bandiere" input type="button" id="ITA" onClick="cambiaBandiera()" /input /div

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