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  • About "If.." in Scheme (plt-scheme)

    - by Amit
    I had a pretty simple requirement in my Scheme program to execute more than one statement, in the true condition of a 'if'. . So I write my code, something like this: (if (= 1 1) ((expression1) (expression2)) ; these 2 expressions are to be executed when the condition is true (expression3) ) Obviously, the above doesn't work, since I have unintentionally created a # procedure with # arguments. So, to get my work done, I simply put the above expressions in a new function and call it from there, in place of the expression1, expression2. It works. So, my point here is: is there any other conditional construct which may support my requirement here?

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  • Modifying nested structs in c#

    - by joniba
    Can someone tell me why the commented line of code (one before last) does not compile? Isn't it the same as the line following it? public struct OtherStruct { public int PublicProperty { get; set; } public int PublicField; public OtherStruct(int propertyValue, int fieldValue) : this() { PublicProperty = propertyValue; PublicField = fieldValue; } public int GetProperty() { return PublicProperty; } public void SetProperty(int value) { PublicProperty = value; } } public struct SomeStruct { public OtherStruct OtherStruct { get; set; } } class Program { static void Main(string[] args) { SomeStruct a = new SomeStruct(); //a.OtherStruct.PublicProperty++; a.OtherStruct.SetProperty(a.OtherStruct.GetProperty() + 1); } }

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  • Cygwin compiling error: "this application has requested the runtime to terminate it in an unusual wa

    - by naspinski
    I am trying to run Cygwin, and I am running into some problems. I tried to compile a program that works both on Windows with mingw and on a Unix system, but when I go to compile it through Cygwin: gcc threads.c -o threads I get the error: this application has requested the runtime to terminate it in an unusual way And that's it... any ideas what I am forgetting or screwing up? I haven't touched this stuff in about 5 years so I am beyond rusty; thanks!

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  • Running a batch file from Perl (Activestate perl in Windows)

    - by Jithesh
    I have a Perl program which does something like below: #!perl use strict; use warnings; my $exe = "C:\\project\\set_env_and_run.bat"; my $arg1 = "\\\\Server\\share\\folder1"; my $arg2 = "D:\\output\\folder1"; my $cmd = "$exe \"$arg1\" \"$arg2\""; my $status = system("$cmd > c:\\tmp\out.txt 2>&1"); print "$status\n"; I am calling this Perl code in an eval block. When invoked, i get the status printed as 0, but the batch file has not actually executed. What would be the reason for this? Thanks, Jits

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  • moviePlayBackDidFinish: is not called in application.

    - by srikanth rongali
    In my application I have used these notifications when playing a video. But, The problem is the control of the program is not entering in to the first two methods(moviePreLoadDidFinish and moviePlayBackDidFinish). It is entering into last method. So, after the video is played and I pressed Done button in the video, I cannot touch any object in screen. I mean I used play button for video to play in a view. After the video played the play button is deactivated. - (void) moviePreloadDidFinish:(NSNotification*)notification { } // Notification called when the movie finished playing. - (void) moviePlayBackDidFinish:(NSNotification*)notification { } // Notification called when the movie scaling mode has changed. - (void) movieScalingModeDidChange:(NSNotification*)notification { } I could not get where I was wrong ? Thank You.

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  • I have a error building a .vdproj on msbuild with nant

    - by Luís Custódio
    I'm getting used to using nant for build releases. But I have started to use asp.net MVC, and i choice make the setup for installation with a .vdproj . But, when I call the: < exec program="${dotnet.dir}/msbuild.exe" commandline='"./Wum.sln" /v:q /nologo /p:Configuration=Release' / in nant, my result is: [exec] D:\My Documents\Visual Studio 2008\Projects\Wum\Wum.sln : warning MS B4078: The project file "Wum.Setup\Wum.Setup.vdproj" is not supported by MSBuild and cannot be built. Someone have some clue, or a solution? If I use the devenv, I'll have a problem? Thanks in advance.

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  • calling WinForms contextmenustrip programmatically

    - by jello
    I programmatically create a Picture Box in c# windows program. I assign it with a value for the Tag property. I would like to print out that tag number programmatically, just for test purposes. so I try this: private void Form1_Load(object sender, EventArgs e) { pic.ContextMenuStrip = contextMenuStrip1; pic.ContextMenuStrip.Click += new EventHandler(this.MyPicHandler); } void MyPicHandler(object sender, EventArgs e) { PictureBox pic = sender as PictureBox; MessageBox.Show(pic.Tag.ToString()); } But when I right-click on the picture, and click on the menu item, it gives me an exception. "A NullReferenceException was unhandled" "Object reference not set to an instance of an object.". anyone's got an idea what's going on?

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  • NDK do not find the standard C++ libraries

    - by Marcos Vasconcelos
    Hi, I'm trying to compile a native program for android. But when runnning the ndk-build command I got the following result. /home/marcos/dev/workspace/rmsdk.native.wraper/jni/include-all/uft_alloc.h:26:21: error: stdexcept: No such file or directory /home/marcos/dev/workspace/rmsdk.native.wraper/jni/include-all/uft_alloc.h:27:18: error: limits: No such file or directory stdexcept and limits are part of the std C++ lib. This is my Android.mk LOCAL_PATH := $(call my-dir) MY_PATH := $(LOCAL_PATH) include $(call all-subdir-makefiles) LOCAL_PATH := $(MY_PATH) include $(CLEAR_VARS) LOCAL_LDLIBS := -llog LOCAL_MODULE := rmsdk LOCAL_SRC_FILES := curlnetprovider.cpp RMServices.cpp LOCAL_C_INCLUDES := $(LOCAL_PATH)/include-all LOCAL_STATIC_LIBRARIES := adept cryptopenssl curl dp expat fonts hobbes jpeg mschema png t3 xml zlib include $(BUILD_SHARED_LIBRARY) I should explicit tell that it's a C++ source?

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  • Java Classpath Problems in Ubuntu

    - by Travis
    First off I'm running Ubuntu 9.10 I've edited the /etc/environment file to look like this: PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games" JAVA_HOME="/usr/lib/jvm/java-6-sun-1.6.0.20" CLASSPATH="/home/travis/freetts/lib/freetts.jar:/home/travis/freetts/lib/jsapi.jar:." I then run "source /etc/environment" to make sure the changes are included. Then I try compiling my simple test program using this: javac Test.java It throws out a few errors, but when I compile like this: javac -cp /home/travis/freetts/lib/freetts.jar:/home/travis/freetts/lib/jsapi.jar:. Test.java It works just fine, this leads me to believe that for some reason javac isn't seeing the CLASSPATH environment variable? I can echo it and everything in the terminal: echo $CLASSPATH gives me what I put in. Any help on this would be greatly appreciated.

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  • WinForms Taskbar Icon - Click Event not firing

    - by Greycrow
    I have created a non-form c# program that uses the NotifyIcon class. The text "(Click to Activate)" shows up when I hover the mouse. So I am getting some events handled. However, The "Click" event does not fire and the Context menu doesnt show up. public class CTNotify { static NotifyIcon CTicon = new NotifyIcon(); static ContextMenu contextMenu = new ContextMenu(); static void Main() { //Add a notify Icon CTicon.Icon = new Icon("CTicon.ico"); CTicon.Text = "(Click to Activate)"; CTicon.Visible = true; CTicon.Click += new System.EventHandler(CTicon_Click); //Create a context menu for the notify icon contextMenu.MenuItems.Add("E&xit"); //Attach context menu to icon CTicon.ContextMenu = contextMenu; while (true) //Infinite Loop { Thread.Sleep(300); //wait } } private static void CTicon_Click(object sender, System.EventArgs e) { MessageBox.Show("Clicked!"); } }

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  • strcpy v/s memcpy

    - by Sachin Chourasiya
    What is the difference between memcpy() and strcpy()? I tried to find it with the help of a program but both are giving the same output. int main() { char s[5]={'s','a','\0','c','h'}; char p[5]; char t[5]; strcpy(p,s); memcpy(t,s,5); printf("sachin p is [%s], t is [%s]",p,t); return 0; } Output sachin p is [sa], t is [sa]

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  • How to set global hook for WH_CALLWNDPROCRET ?

    - by user261882
    Hello I want to set global hook that tracks which application is active. In my main program I am doing the foloowing : HMODULE mod=::GetModuleHandle(L"HookProcDll"); HHOOK rslt=(WH_CALLWNDPROCRET,MyCallWndRetProc,mod,0); The hook procedure which is called MyCallWndRetProc exists in separate dll called HookProcDll.dll. The hook procedure is watching for WM_ACTIVATE message. The thing is that the code stucks in the line where I am setting the hook, i.e in the line where I am calling ::SetWindowsHookEx. And then Windows gets unresponsive, my task bar disappears and I am left with empty desktop. Then I must reset the computer. What am doing wrong, why Windows get unresponsive ? and Do I need to inject HookProcDll.dll in every process in order to set the global hook, and how can I do that ?

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  • What is the fastest way to unzip textfiles in Matlab during a function?

    - by Paul
    Hello all, I would like to scan text of textfiles in Matlab with the textscan function. Before I can open the textfile with fid = fopen('C:\path'), I need to unzip the files first. The files have the extension: *.gz There are thousands of files which I need to analyze and high performance is important. I have two ideas: (1) Use an external program an call it from the command line in Matlab (2) Use a Matlab 'zip'toolbox. I have heard of gunzip, but don't know about its performance. Does anyone knows a way to unzip these files as quick as possible from within Matlab? Thanks!

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  • GhostScript font issues

    - by Robert
    I'm running GPL Ghostscript 8.70 (2009-07-31) on Windows XP. I have about 100 PDF files I've attempted to run through GS, but I'm having font-related issues on two separate groups of files from two different customers. I'm not sure if the issues could be related. Here are the two errors I receive: Loading Courier font from C:\Program Files\gs\fonts/cour.ttf... 2343384 986555 13583240 12261829 3 done. Using CourierNewPSMT font for Courier. Error: /rangecheck in --get-- Can't find CID font "Arial". Substituting CID font /Adobe-Identity for /Arial, see doc/Use.htm#CIDFontSubstitution. The substitute CID font "Adobe-Identity" is not provided either. Will exit with error. Error: /undefined in findresource I've tried just about everything I can think of with fontmap and cidfmap. Does anyone out there have a solution?

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  • Howto add a changed file to an older (not last) commit in Git

    - by David Klein
    Hey, I changed several things over the last hour and committed them step by step. But I just realized I've forgot to add a changed file some commits ago. The Log looks like this: GIT TidyUpRequests u:1 d:0> git log commit fc6734b6351f6c36a587dba6dbd9d5efa30c09ce Author: David Klein <> Date: Tue Apr 27 09:43:55 2010 +0200 The Main program now tests both Webservices at once commit 8a2c6014c2b035e37aebd310a6393a1ecb39f463 Author: David Klein <> Date: Tue Apr 27 09:43:27 2010 +0200 ISBNDBQueryHandler now uses the XPath functions from XPath.fs too commit 06a504e277fd98d97eed4dad22dfa5933d81451f Author: David Klein <> Date: Tue Apr 27 09:30:34 2010 +0200 AmazonQueryHandler now uses the XPath Helper functions defined in XPath.fs commit a0865e28be35a3011d0b6091819ec32922dd2dd8 <--- changed file should go here Author: David Klein <> Date: Tue Apr 27 09:29:53 2010 +0200 Factored out some common XPath Operations Any ideas? :)

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  • UITableView background customization strange behavior

    - by Omer
    Hi, There is a couple of hours that I'm trying to set a tableView background image. My controller is a subclass of UITableViewController, and I simply wrote this lines of code in ViewDidLoad method. UIImage *image = [UIImage imageNamed:@"home-portrait-iphone.png"]; UIImageView *imageView = [[UIImageView alloc] initWithImage:image]; self.tableView.backgroundView = imageView; Everything looks great on the simulator, I mean, I see my table and as background view, y can see the image. But when the app is running on the device (ipod touch), I get this error: Program received signal: “SIGABRT”. and the stack says: * -[UITableView setBackgroundView:]: unrecognized selector sent to instance 0x812e00 Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '** -[UITableView setBackgroundView:]: unrecognized selector sent to instance 0x812e00' and the exception is thrown in the assignment, a mean this line: self.tableView.backgroundView = imageView; any ideas? Thank you in advance.

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  • Returning a tuple of multipe objects in Python C API

    - by celil
    I am writing a native function that will return multiple Python objects PyObject *V = PyList_New(0); PyObject *E = PyList_New(0); PyObject *F = PyList_New(0); return Py_BuildValue("ooo", V, E, F); This compiles fine, however, when I call it from a Python program, I get an error: SystemError: bad format char passed to Py_BuildValue How can this be done correctly? EDIT: The following works PyObject *rslt = PyTuple_New(3); PyTuple_SetItem(rslt, 0, V); PyTuple_SetItem(rslt, 1, E); PyTuple_SetItem(rslt, 2, F); return rslt; However, isn't there a shorter way to do this?

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  • Reverse engineering to get answers

    - by cornjuliox
    So I've spent the last few days looking for a way to create a simple image drawing app with wxPython, and I think the key to doing just that is understanding how to use Device Contexts. The problem is that the wxPython demo program doesn't demonstrate DCs, and the docs for both wxPython and wxWidgets don't explain as much as I'd like to know so I've decided to try and 'reverse engineer' an existing app to see how its done. The first problem I have is that I don't know of any drawing apps written in wxPython (or any written in Python for that matter o.o), and the second is I don't know how I'd go about doing it. Am I right in saying that I'm going to need a copy of an application's Python source and something like Winpdb? What do professional programmers do when they find themselves in a situation like mine, needing answers that the docs don't provide?

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  • Hibernate AssertionFailure in different Threads

    - by bladepit
    I connect to my database with one session. I have always the same session in my hole program. My Thread "1" catches primary data from the database. The user must be allowed to cancel this thread. So if the user presses the cancel button to often or to fast (this is my interpretation) the following error occures: ERROR org.hibernate.AssertionFailure - HHH000099: an assertion failure occured (this may indicate a bug in Hibernate, but is more likely due to unsafe use of the session) org.hibernate.AssertionFailure: possible non-threadsafe access to the session The same errors occures if i cancel my thread "2" which is running in the background after my thread "1" ist finished and the try to load another primary data set from the database. Is the failure that i am using the same session in my two threads? What is the right way to solve such a problem?

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  • lwjgl 101: How can I write the basics?

    - by Vuntic
    This ought to be really simple, but I cannot for the life of me figure out how to compile anything with lwjgl and have it work. I can write something like package gwison; import org.lwjgl.Sys; public class G { public static void main(String[] args) { System.out.println(Sys.getTime()); } } and I can easily compile a program with several classes in different packages, as long as I wrote all the classes myself. But I have no clue how to make G work. I think it has something to do with classpathes? Maybe? Help?

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  • Speed improvements for Perl's chameneos-redux in the Computer Language Benchmarks Game

    - by Robert P
    Ever looked at the Computer Language Benchmarks Game (formerly known as the Great Language Shootout)? Perl has some pretty healthy competition there at the moment. It also occurs to me that there's probably some places that Perl's scores could be improved. The biggest one is in the chameneos-redux script right now—the Perl version runs the worst out of any language: 1,626 times slower than the C baseline solution! There are some restrictions on how the programs can be made and optimized, and there is Perl's interpreted runtime penalty, but 1,626 times? There's got to be something that can get the runtime of this program way down. Taking a look at the source code and the challenge, how can the speed be improved?

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  • How do I control when a contextMenuStrip is displayed?

    - by GregH
    In vb.net (2008), I want to be able to control when a contextMenuStrip (context menu) is displayed. I don't want it to always appear when the right mouse button is clicked...only when certain criteria within my program are met. I figure I would use addHandler but I'm not exactly clear on how to completely control the opening of the contextMenuStrip. I know I would issue a call to the "open" method to render the contextMenuStrip. However, I am unclear as to how to completely take over control of when to render the contextMenuStrip.

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  • Symfony include_component() with components from a plugin

    - by Chris T
    All I'd like to do is use include_component to call a component from a plugin that I'm developing <?php #/plugins/fooPlugin/modules/barModule/actions/components.class.php class barModuleComponents extends sfComponents{ /** * Constructor */ function __construct(){ } function executeHello(){ } } ?> and <!-- /plugins/fooPlugin/modules/barModule/templates/_hello.php --> <p>HELLO WORLD!</p> But it won't load if I do this in #/apps/frontend/modules/homepage/templates/indexSuccess.php <?php include_component("barModule", "hello"); ?> XDebug gives me: ( ! ) Fatal error: Call to a member function add() on a non-object in C:\Program Files\WaterProof\PHPEdit\3.6.2\Extensions\Symfony\distribution\1.4\lib\helper\PartialHelper.php on line 360

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  • Switching VS2010 to use Windows 7.1 SDK

    - by freefallr
    I've used VS2008 on my development machine for some years now, with windows SDK v7.1. I've installed VS2010, and it's using the Windows SDK v7.0a, but I need it to use the Windows 7.1 SDK (which I had installed prior to installing VS2010). When I run the Windows SDK 7.1 configuration tool, to switch the Windows SDK in use, the tool updates for VS2008, but not for VS2010. The message it reports is: "The Windows SDK Configuration Tool has successfully set Windows SDK version v7.1 as the current version for Visual Studio 2008" The configuration tool is installed with the Windows 7.1 SDK and is found here: "C:\Program Files\Microsoft SDKs\Windows\v7.1\Setup\WindowsSdkVer.exe" VS2010 continues to use WSDK 7.0a, which extremely frustrating, as I need to do DirectShow development (so I need to build the baseclasses, which aren't released with 7.0a release of WSDK). Would I be correct in assuming that it's not updating VS2010 settings because VS2010 wasn't installed at the time that I installed Windows 7.1 SDK? Can I fix this manually, or should I uninstall Windows 7.1 SDK, then reinstall it? Any other suggestions / workarounds for this?

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  • How to gracefully exit SLIME and EMACS

    - by Gregory Gelfond
    Hi All, I have a question regarding how to "gracefully exit SLIME", when I quit Emacs. Here is the relevant portion of my config file: ;; SLIME configuration (setq inferior-lisp-program "/usr/local/bin/sbcl") (add-to-list 'load-path "~/Scripts/slime/") (require 'slime) (slime-setup) ;; configure SLIME to gracefully quit when emacs ;; terminates (defun slime-smart-quit () (interactive) (when (slime-connected-p) (if (equal (slime-machine-instance) "Gregory-Gelfonds-MacBook-Pro.local") (slime-quit-lisp) (slime-disconnect))) (slime-kill-all-buffers)) (add-hook 'kill-emacs-hook 'slime-smart-quit) To my knowledge this should automatically kill SLIME and it's associated processes whenever I exit Emacs. However, every time I exit, I still get the prompt: Proc Status Buffer Command ---- ------ ------ ------- SLIME Lisp open *cl-connection* (network stream connection to 127.0.0.1) inferior-lisp run *inferior-lisp* /usr/local/bin/sbcl Active processes exist; kill them and exit anyway? (yes or no) Can someone shed some insight as to what I'm missing from my config? Thanks in advance.

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