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  • What do you call this functional language feature?

    - by Jimmy
    ok, embarrassing enough, I posted code that I need explained. Specifically, it first chains absolute value and subtraction together, then tacks on a sort, all the while not having to mention parameters and arguments at all, because of the presense of "adverbs" that can join these functions "verbs" What (non-APL-type) languages support this kind of no-arguments function composition (I have the vague idea it ties in strongly to the concepts of monad/dyad and rank, but its hard to get a particularly easy-to-understand picture just from reading Wikipedia) and what do I call this concept?

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  • Problem with OOP Class Definitions

    - by oben
    Hi, this is Oben from Turkey. I work for my homework in C++ and i have some problems with multiply definitions. My graph class ; class Graph{ private: string name; //Graph name fstream* graphFile; //Graph's file protected: string opBuf; //Operations buffer int containsNode(string); //Query if a node is present Node* nodes; //Nodes in the graph int nofNodes; //Number of nodes in the graph public: static int nOfGraphs; //Number of graphs produced Graph(); //Constructors and destructor Graph(int); Graph(string); Graph(const Graph &); ~Graph(); string getGraphName(); //Get graph name bool addNode(string); //add a node to the graph bool deleteNode(string); //delete a node from the graph bool addEdge(string,string); //add an edge to the graph bool deleteEdge(string,string); //delete an edge from the graph void intersect(const Graph&); //intersect the graph with the <par> void unite(const Graph&); //intersect the graph with the <par> string toString(); //get string representation of the graph void acceptTraverse(BreadthFirst*); void acceptTraverse(DepthFirst *); }; and my traversal class; class Traversal { public: string *visitedNodes; virtual string traverse (const Graph & ); }; class BreadthFirst : public Traversal { public : BreadthFirst(); string traverse(); }; class DepthFirst : public Traversal { public : DepthFirst(); string traverse(); }; My problem is in traversal class , i need to declare Graph class at the same time , in graph class i need traversal class to declare. I have big problems with declerations :) Could you please help me ?

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  • Vb6 project files and source safe

    - by Andrew
    A part of the application that I am working on is a legacy Vb6 Windows forms application. All the files in the project are under source control (VSS) except the Vb6 project file. From what I can establish from the other developers working on the project the reason for this is that the com components used in the projects have different references on each developers machine. I want to move the project files into VSS so that when files are added to the project these can be updated in the project files and other developers (and more importantly an automated build script) can get the latest project files from source safe. Does anyone know if/how I can achieve this in such a way as to not corrupt the references to other com components on different development machines?

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  • Listening UDP or switch to TCP in a MFC application

    - by Alexander.S
    I'm editing a legacy MFC application, and I have to add some basic network functionalities. The operating side has to receive a simple instruction (numbers 1,2,3,4...) and do something based on that. The clients wants the latency to be as fast as possible, so naturally I decided to use datagrams (UDP). But reading all sorts of resources left me bugged. I cannot listen to UDP sockets (CAsyncSocket) in MFC, it's only possible to call Receive which blocks and waits. Blocking the UI isn't really a smart. So I guess I could use some threading technique, but since I'm not all that experienced with MFC how should that be implemented? The other part of the question is should I do this, or revert to TCP, considering reliability and implementation issues. I know that UDP is unreliable, but just how unreliable is it really? I read that it is up to 50% faster, which is a lot for me. References I used: http://msdn.microsoft.com/en-us/library/09dd1ycd(v=vs.80).aspx

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  • VS2005 COMPLITION PROBLEM WITH SETTINGS

    - by vijay.j
    Hi all i am trying to integrating PJNSMTPCONNECTION CLASSES in my project,they say that those classes donot uses mfc. MY project is with the setting like MT, and using standard library linking, when i try to complie i am getting CSTRING not defined and fatal error C1189: #error : WINDOWS.H already included. MFC apps must not #include if i include afx.h and remove windows.h, i am getting iDLLMain aleardy defined like errors

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  • VLC player event catch

    - by user350632
    In my C# application i need to trigger some events when a VLC player (preferably) starts playback (a play button is pressed in VLC for example).Tried Windows Media Player classic with Microsoft Spy++ and observed messages that are sent when playback starts\repeats but i don't know how i could "catch" those messages in my C# code.So my question: is there any way to hook up to event in VLC (or WMP) and get notified about playback status (play, stop, start of repeat). My goal is to create a C# function that waits for start of playback event in player and then triggers some actions in my application (this should also happen when playback ends and starts repeating). What approach should i take here? Just to clearify: I don't want to embedded a new instance of VLC in my app, but instead control/read the "real" full version of VLC, started seperatly by the user

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  • Updating an image's ImageUrl within a Repeater

    - by Django Reinhardt
    I hope someone can help me. It's a pretty newbie question, I'm afraid. I have an image inside a repeater, and I would like to change its IMAGEURL based on parameter that's being passed to it. <asp:Repeater ID="Repeater" runat="server"> <HeaderTemplate> <asp:Image ID="imgType" runat="server" /> </HeaderTemplate> <ItemTemplate> <%# Eval("DisplayName")%> </ItemTemplate> <SeparatorTemplate> <hr /> </SeparatorTemplate> </asp:Repeater> There is a SWITCH statement in the code behind that is altering the IMAGEURL depending on what's being passed to it. Inevitably, however, the images ID ("imgType") is not visible to the SWITCH statement (presumably because it's inside a REPEATER). Any suggestions on the best way to implement this would be greatly appreciated. Sorry for such a newbie question.

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  • What's the meaning of the angle brackets on LINQ methods in Intellisense? (Contains<>, Count<>, Dis

    - by user312758
    They usually involve generics. But some methods with generics don't have them, and not all extension methods have them. They've just "been there" since day one, we've all seen them; but I realized I still don't know what they mean, and I can't find the answer anywhere. Now it's really bugging me. Google just turns up results that are about XML, etc. Is this officially documented anywhere? Thanks. EDIT: Well that's just great. Since I just created an account to make my first Stack Overflow post, to get an answer for this burning question; I'm not allowed to post my pretty Intellisense picture, or create a new tag "angle-brackets". I love Stack Overflow, but... what a welcome! Maybe my problem is that they aren't actually called "angle brackets"... ?? Anyway, I guess if you really want to see my beautiful screenshot you could manually go to: http://www.freeimagehosting.net/uploads/6a6c2f3268.png Bump me up please so I can include it in the post, thanks. ;)

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  • how to run href="#var=something" before onclick function fires in javascript?

    - by korben
    i'm using the below javascript to change an image on an aspx in asp.net c# <script language="JavaScript" type="text/javascript"> var updateImageWhenHashChanges = function() { theImage = document.getElementById("ctl00_ContentPlaceHolder1_Image1a"); if(window.location.hash == "#size=2") { theImage.src = "<%# Eval("realfilename", "/files/l{0}") %>"; } else if(window.location.hash == "#size=3") { theImage.src = "<%# Eval("realfilename", "/files/{0}") %>"; } else if(window.location.hash == "#size=1") { theImage.src = "<%# Eval("fullthumbname", "/thumbnails/{0}") %>"; } else { } } </script> here's how i call it with a link <a href="#size=3" onclick="updateImageWhenHashChanges();">test</a> the problem is that it only does what i'm expecting on the SECOND click of the link, because it seems onclick fires before the href, so the first time i'm just placing the var and the 2nd time i'm actually getting what i want. does anyone know how i can fix this? i'm trying to get the image to change on each click

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  • If-statement with logical OR

    - by exiter2000
    public class Test{ public static void main(String args[]){ int a = 0; int b = 1; int c = 10; if ( a == 0 || b++ == c ){ a = b + c; }else{ b = a + c; } System.out.println("a: " + a + ",b: " + b + ",c: " + c); } } Ok, this is Java code and the output is a: 11,b: 1,c: 10 And I believe the C acts same as Java in this case That is because second condition(b++ == c) would never executed if the first condition is true in 'OR' operator. There is a "NAME" for this. I just don't remember what it is. Does anyone know what this is called?? Thanks in advance

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  • Is there a way to load an existing connection string for Linq to SQL from an app.config file?

    - by Brian Surowiec
    I'm running into a really annoying problem with my Linq to SQL project. When I add everything in under the web project everything goes as expected and I can tell it to use my existing connection string stored in the web.config file and the Linq code pulls directly from the ConfigurationManager. This all turns ugly once I move the code into its own project. I’ve created an app.config file, put the connection string in there as it was in the web.config but when I try to add another table in the IDE keeps forcing me to either hardcode the connection string or creates a Settings file and puts it in there, which then adds a new entry into the app.config file with a new name. Is there a way keep my Linq code in its own project yet still refer back to my config file without the IDE continuously hardcoding the connection string or creating the Settings file? I’m converting part of my DAL over to use Linq to SQL so I’d like to use the existing connection string that our old code is using as well as keep the value in a common location, and one spot, instead of in a number of spots. Manually changing the mode to WebSettings instead of AppSettings works untill I try to add a new table, then it goes back to hardcoding the value or recreating the Settings file. I also tried to switch the project type to be a web project and then rename my app.config to web.config and then everything works as I’d like it to. I’m just not sure if there are any downfalls to keeping this as a web project since it really isn't one. The project only contains the Linq to SQL code and an implementation of my repository classes. My project layout looks like this Website -connectionString.config -web.config (refers to connectionString.config) Middle Tier -Business Logic -Repository Interfaces -etc. DAL -Linq to SQL code -Existing SPROC code -connectionString.config (linked from the web poject) -app.config (refers to connectionString.config)

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  • Device Emulator not recognized in windows when I press cradle

    - by JasperT
    Hi Experts, Who can help me with this: I am working on Win7 x64, with VS.net 2008. I am developping for pocketpc. When my application is deployed to the device emulator it can't connect to my computer / db server. Both de emulator as well the mobile device center are configured to use DMA. When I cradle the device using device manager, nothing happens. What can I try? Greets, Jasper

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  • Saving Bitmap from Clipboard to File Error

    - by Vanwaril
    I'm using OLEDropTarget to get dropped content. It works fine with text. However, I'm not able to figure out how to get bitmaps from CF_BITMAP type data objects and save them to file. My code: HGLOBAL hg = pDataObject->GetGlobalData(CF_BITMAP); if (NULL == hg) { return FALSE; } HBITMAP pData = (HBITMAP)GlobalLock(hg); if(pData == NULL) return false; HBITMAP bmp; ::GetObject(pData,sizeof(HBITMAP),&bmp); CImage cnn; cnn.Attach(bmp); cnn.Save(L"here.bmp",Gdiplus::ImageFormatBMP); I get an error on the Attach, but when debugging I noticed that the GetObject doesn't make a copy into the second HBITMAP.

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  • VS2010 is removing code from designer without warning - causing issues

    - by schmoopy
    I have a WinForm with a pretty complex layout (has lots of controls, panels, etc.) Whenever i open the form the file is automatically checked out from source control and it removes anything in the designer file that refereces my menustrip or statusstrip ie: the following get removed (w/o warning) Me.MyMenuStip.SuspendLayout() Me.MyStatusStrip.SuspendLayout() Me.MyMenuStrip.ResumeLayout(False) Me.MyMenuStrip.PerformLayout() Me.MyStatusStrip.ResumeLayout(False) Me.MyStatusStrip.PerformLayout() The code still builds, but there are no Menu or Status items rendered. Any ideas on what i can do? I do not want to just remove/add the menustrip for instance cause i would loose all of my menu items (and there are a lot) Thanks in advance!

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  • What is the best way to detect Copy (Ctrl+C) event in an IWpfTextView?

    - by Nick U
    I am trying to detect a copy event in the text view and I have been researching the best way to do this. Is it to possibly hook into the StandardCommand Copy event somehow and detect it that way? Or is it possible to use the KeyProcessor(and simply detect Ctrl+C keypresses)? My extension is currently implementing the IWpfTextViewCreationListener; is there a way to somehow get access to the KeyProcessor or StandardCommand from the IWpfTextView that the listener is passing to me? If so, can you post a code sample that demonstrates this? Thanks, Nick

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  • Is there a suitable replacement for C++, when I would like to write video processing applications?

    - by Nisanio
    Hi I want to write a video editing software, and the "logical" conclusion is that the language I must to use is C++... But I don't like it (sorry c++ fans) I would like to write it with something cool, like Lisp or Haskell or Erlang... But I don't know if the open source implementation of those languages (I don't have money to buy licenses) let me made a competitive software (in the performance area) What do you think? what do you recommend?

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  • Managing tabs and their effects.

    - by VBeginner
    I have two separate areas in my form. Left side for radio buttons, combo boxes, etc. Right side for tabs and even tabs within tabs. For each tab selected, I'd like to display different controls on the left side for use in that tab. I've tried using many things, including focus, click, etc. Nothing seems to work the way I intend it to. Especially on the tabs within the tabs. Thank you.

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