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  • C++ - dynamic pointer of array

    - by Eagle
    Hi to all, first i would like to say i am Newbie in C++. As part of my master thesis i am writing a program in C++ which also get as parameters the variables m and d (both integers). Were d is the power of 2 (this means 2^d elements). Parameter m define the number of possible interactions between one element and the total group (2^d elements). The number of possible interactions is computed as following: \kappa = \sum_{i=0}^m\binom{d}{i} (at present i generate vector of vectors for 2^d x \kappa, but my Prof. would like me to create different statistics to different m's. My first though was to to generate a dynamic array of m arrays of different sizes... Then i though of defining a 3-dim array with the biggest needed 2d array, but also program speed is important (e.g d = 20). i would like to ask for your advice how to define such kind of dynamic array that will also be fast. Regards

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  • Force line-buffering of stdout when piping to tee

    - by houbysoft
    Usually, stdout is line-buffered. In other words, as long as your printf argument ends with a newline, you can expect the line to be printed instantly. This does not appear to hold when using a pipe to redirect to tee. I have a C++ program, a, that outputs strings, always \n-terminated, to stdout. When it is run by itself (./a), everything prints correctly and at the right time, as expected. However, if I pipe it to tee (./a | tee output.txt), it doesn't print anything until it quits, which defeats the purpose of using tee. I know that I could fix it by adding a fflush(stdout) after each printing operation in the C++ program. But is there a cleaner, easier way? Is there a command I can run, for example, that would force stdout to be line-buffered, even when using a pipe?

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  • erroneous Visual C float / double conversion?

    - by RED SOFT ADAIR
    In Visual C++ i wrote the following sample in a C++ program: float f1 = 42.48f; double d1 = 42.48; double d2 = f1; I compiled the program with Visual Studio 2005. In the debugger i see the following values: f1 42.480000 float d1 42.479999999999997 double d2 42.479999542236328 double d1 by my knowledege is OK, but d2 is wrong. The problem occurs as well with /fp=precise as with /fp=strict as with /fp=fast. Whats the problem here? Any hint how to avoid this Problem? This leads to serious numerical problems.

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  • How do I set sys.excepthook to invoke pdb globally in python?

    - by saffsd
    From Python docs: sys.excepthook(type, value, traceback)¶ This function prints out a given traceback and exception to sys.stderr. When an exception is raised and uncaught, the interpreter calls sys.excepthook with three arguments, the exception class, exception instance, and a traceback object. In an interactive session this happens just before control is returned to the prompt; in a Python program this happens just before the program exits. The handling of such top-level exceptions can be customized by assigning another three-argument function to sys.excepthook. http://docs.python.org/library/sys.html How do I modify this globally so the default action is to always invoke pdb? Is there a configuration file I can change? I don't want to wrap my code to do this.

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  • Intercept windows open file

    - by HyLian
    Hello, I'm trying to make a small program that could intercept the open process of a file. The purpose is when an user double-click on a file in a given folder, windows would inform to the software, then it process that petition and return windows the data of the file. Maybe there would be another solution like monitoring Open messages and force Windows to wait while the program prepare the contents of the file. One application of this concept, could be to manage desencryption of a file in a transparent way to the user. In this context, the encrypted file would be on the disk and when the user open it ( with double-click on it or with some application such as notepad ), the background process would intercept that open event, desencrypt the file and give the contents of that file to the asking application. It's a little bit strange concept, it could be like "Man In The Middle" network concept, but with files instead of network packets. Thanks for reading.

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  • Importing ctype; embedding python in C++ application

    - by Drew
    I'm trying to embed python within a C++ based programming language (CCL: The compuatational control language, not that any of you have heard of it). Thus, I don't really have a "main" function to make calls from. I have made a test .cc program with a main, and when I compile it and run it, I am able to import my own python modules and system modules for use. When I embed my code in my CCL-based program and compile it (with g++), it seems I have most functionality, but I get the import error: ImportError: /usr/lib/python2.6/lib-dynload/_ctypes.so: undefined symbol: PyType_GenericNew Can someone explain this to me and how to go about solving it? It seems like I've linked the objects correctly. Thanks.

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  • Code jumps out of a jar and runs? What is causing this?

    - by Mike
    I am trying to get a sample program working with JUNG, a graphing tool in Java. I downloaded and referenced all the .jar files in eclipse so my project hierarchy looks like this: In Test.java I have the following code: public class Test { static public void main() { System.out.print("Hello"); }} For some reason though when I try to run it as a Java Application by right clicking on Jung test in the project hierarchy I am presented with a bunch of classes. My Test.java isn't on the list so if I just leave it as ** and press ok it starts running a program that is dynamically adding nodes and vertexes to a graph. I can't seem to figure out what code its actually executing. I know java but stuff like this with the jar files seems to be getting lost on me. Any ideas? Thanks

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  • limit Google maps of countries in the autocomplete list to "INDIA, USA and UK"

    - by Manoj Thakur
    This code is not working. Please tell me the exact solution <script src="maps.googleapis.com/maps/api/…; type="text/javascript"></script> <script type="text/javascript"> function initialize() { var input = document.getElementById('searchTextField'); /* restrict to multiple cities? */ var options = { types: ['(cities)'], componentRestrictions: {country: ["usa", "uk"]} }; var autocomplete = new google.maps.places.Autocomplete(input, options); } google.maps.event.addDomListener(window, 'load', initialize); </script>

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  • Jenkins and Visual Studio Online integration authentication

    - by user3120361
    right now I am trying to Setup Continuouse Integration - Delivery for a basic WCF Service, which will be hosted on a Microsoft Azure VM. The Project is Version Controlled through Visual Studio Online. So I installed Jenkins (also on the Azure VM), TFS plugin etc. and started the first Test Build: As Server URL I used "[VSO Adress]/DefaultCollection" and for Login purposes my Microsoft Account (I can Access VSO with that). The Problem is, when I run the Build I get the following error: Started by user Developer Building in workspace C:\Program Files (x86)\Jenkins\jobs\test\workspace [workspace] $ "C:\Program Files (x86)\TEE-CLC-11.0.0.1306\TEE-CLC-11.0.0\tf.cmd" workspaces -format:brief -server:[VSO Adress]/DefaultCollection ****" An error occurred: Access denied connecting to TFS server [VSO Adress] (authenticating as har****@*******o.com) FATAL: Executable returned an unexpected result code [100] ERROR: null Finished: FAILURE So my question is, whether it is generally possible to connect Jenkins and VSO that way and if so, which login credentials are needed

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  • C++ option/long option implementation

    - by K Hein
    I am working on a parser for meta programming language using C++ on Linux platform. Right now, I need to implement option/long option for the parser to provide some additional features. Basically, if the user pass in some additional option, the parser needs to store statistics while parsing the text files. I can think of two ways to implement it. One way is to user global to store options entered by users. Another way is to create a singleton class to store options. So I would like to know if there is any other way to implement it. What is the best/most recommended way of implementing it? Thanks in advance. Regards, K.Hein

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  • How can I get read-ahead bytes?

    - by Bruno Martinez
    Operating systems read from disk more than what a program actually requests, because a program is likely to need nearby information in the future. In my application, when I fetch an item from disk, I would like to show an interval of information around the element. There's a trade off between how much information I request and show, and speed. However, since the OS already reads more than what I requested, accessing these bytes already in memory is free. What API can I use to find out what's in the OS caches? Alternatively, I could use memory mapped files. In that case, the problem reduces to finding out whether a page is swapped to disk or not. Can this be done in any common OS?

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  • Best .NET Framework compression class?

    - by Jack
    Hi all Yes, I know GZipStream or DeflateStream is the common ones in .NET Framework which handle compression/decompression. I wish to have compress/decompress functions in my program, but I wish a .NET Framework C# one, not a 3rd party open source. I can't use because of those copyright restrictions in my program. GZipStream and DeflateStream are not so good. for e.g., GZipStream compress a file to 480KB while 7Zip compress the same file to the size of 57KB. Does Microsoft have other good compression methods??? Thanks

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  • JSF inner datatable not respecting rendered condition of outer table.

    - by Marc
    <h:dataTable cellpadding="0" cellspacing="0" styleClass="list_table" id="OuterItems" value="#{valueList.values}" var="item" border="0"> <h:column rendered="#{item.typeA"> <h:dataTable cellpadding="0" cellspacing="0" styleClass="list_table" id="InnerItems" value="#{item.options}" var="option" border="0"> <h:column > <h:outputText value="Option: #{option.displayValue}"/> </h:column> </h:dataTable> </h:column> <h:column rendered="#{item.typeB"> <h:dataTable cellpadding="0" cellspacing="0" styleClass="list_table" id="InnerItems" value="#{item.demands}" var="demand" border="0"> <h:column > <h:outputText value="Demand: #{demand.displayValue}"/> </h:column> </h:dataTable> </h:column> </h:dataTable> public class Item{ ... public boolean isTypeA(){ return this instanceof TypeA; } public boolean isTypeB(){ return this instanceof TypeB; } ... } public class typeA extends Item(){ ... public List getOptions(){ .... } ... } public class typeB extends Item(){ ... public List getDemands(){ ... } .... } I'm having an issue with JSF. I've abstracted the problem out here, and I'm hoping someone can help me understand how what I'm doing fails. I'm looping over a list of Items. These Items are actually instances of the subclasses TypeA and TypeB. For Type A, I want to display the options, for Type B I want to display the demands. When rendering the page for the first time, this works fine. However, when I post back to the page for some action, I get an error: [3/26/10 12:52:32:781 EST] 0000008c SystemErr R javax.faces.FacesException: Error getting property 'options' from bean of type TypeB at com.sun.faces.lifecycle.ApplyRequestValuesPhase.execute(ApplyRequestValuesPhase.java:89) at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java(Compiled Code)) at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:91) at com.ibm.faces.portlet.FacesPortlet.processAction(FacesPortlet.java:193) My grasp on the JSF lifecyle is very rough. At this point, i understand there is an error in the ApplyRequestValues Phases which is very early and so the previous state is restored and nothing changes. What I don't understand is that in order to fufill the condition for rendering "item.typeA" that object has to be an instance of TypeA. But here, it looks like that object passed the condition even though it was an instance of TypeB. It is like it is evaluating the inner dataTable (InnerItems) before evaluating the outer (outerItems). My working assumption is that I just don't understand how/when the rendered attribute is actually evaluated.

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  • Jquery set defaults for all instances of a plugin

    - by Chris
    Given the following plugin how would you set defaults for all the instances? I would like it to work the same as $.datepicker.setDefaults(). (function ($) { $.fn.borderSwitcher = function (options) { defaults = { borderColor: 'Black', borderWidth: '1px', borderStyle: 'solid' }; return this.each(function () { var settings = $.extend(defaults, options); $(this).focus(function () { //find a better way to set border properties var props = settings.borderStyle + ' ' + settings.borderWidth + ' ' + settings.borderColor; $(this).css('border', props); }); $(this).blur(function () { $(this).css('border', ''); }); }); }; })(jQuery);

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  • Is there a way to access the locale used by gettext under windows ?

    - by phtrivier
    I have a program where i18n is handled by gettext. The program works fine, however for some reason I need to know the name of the locale used by gettext at runtime (something like 'fr_FR') under win32. I looked into gettext sources, and there is a quite frightening function that computes it on all platforms (gl_locale_name, in a C file called "localename.h/c"). However, this file does not seem to be installed alongside gettext or libintl, so I can't seem to call the function. Is there another function provided by gettext to get this value ? Or in another package (boost, glib, anything ?) (On a related note, there is a thing called std::locale in the C++ standard library, and according to the doc calling std::locale("") should create a locale with the settings of the system, unless I am mistaken ... but then the name is 'C' under windows. Is it a viable way of getting the locale name ? What I am doing wrong ?)

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  • Generate Javadoc for interfaces only using Ant script?

    - by ipkiss
    Hi all, I am using Apache Ant to generate Javadoc for my program which has many projects(or modules). However, I just want to generate Javadoc for Interfaces ONLY and I do not know how to check if a file is a class or interface in Ant. Someone suggested me that I should use and specify a list of files to exclude or include. However, there are hundreds of files in my program and specifying a list of class files to exclude is impossible. Does anyone have some ideas, please?

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  • When I really need to use [NSThread sleepForTimeInterval:1];

    - by Timbo
    Hi there, I have a program that needs to use sleep. Like really needs to. In lieu of spending ages explaining why, suffice to say that it needs it. Now I'm told to split off my code into a separate thread if it requires sleep so I don't lose interface responsiveness, so I've started learning how to use NSThread. I've created a brand new program that is conceptual so to solve the issue for this example will help me in my real program. Short story is I have a class, it has instance variables and I need a loop with a sleep to be depended on the value of that instance variable. Here's what I've put together anyway, your help is very much appreciated :) Cheers Tim /// Start Test1ViewController.h /// #import <UIKit/UIKit.h> @interface Test1ViewController : UIViewController { UILabel* label; } @property (assign) IBOutlet UILabel *label; @end /// End Test1ViewController.h /// /// Start Test1ViewController.m /// #import "Test1ViewController.h" #import "MyClass.h" @implementation Test1ViewController @synthesize label; - (void)viewDidAppear:(BOOL)animated { [super viewDidAppear:animated]; label.text = @"1"; [NSThread detachNewThreadSelector:@selector(backgroundProcess) toTarget:self withObject:nil]; } - (void)backgroundProcess { NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init]; // Create an instance of a class that will eventually store a whole load of variables MyClass *aMyClassInstance = [MyClass new]; [aMyClassInstance createMyClassInstance:(@"Timbo")]; while (aMyClassInstance.myVariable--) { NSLog(@"blah = %i",aMyClassInstance.myVariable); label.text = [NSString stringWithFormat:@"blah = %d", aMyClassInstance.myVariable]; //how do I pass the new value out to the updateLabel method, or reference aMyClassInstance.myVariable? [self performSelectorOnMainThread:@selector(updateLabel) withObject:nil waitUntilDone:NO]; //the sleeping of the thread is absolutely mandatory and must be worked around. The whole point of using NSThread is so I can have sleeps [NSThread sleepForTimeInterval:1]; } [pool release]; } - (void)updateLabel {label.text = [NSString stringWithFormat:@"blah = %d", aMyClassInstance.myVariable]; // be nice if i could } - (void)didReceiveMemoryWarning {[super didReceiveMemoryWarning];} - (void)viewDidUnload {} - (void)dealloc {[super dealloc];} @end /// End Test1ViewController.m /// /// Start MyClass.h /// #import <Foundation/Foundation.h> @interface MyClass : NSObject { NSString* name; int myVariable; } @property int myVariable; @property (assign) NSString *name; - (void) createMyClassInstance: (NSString*)withName; - (int) changeVariable: (int)toAmount; @end /// End MyClass.h /// /// Start MyClass.h /// #import "MyClass.h" @implementation MyClass @synthesize name, myVariable; - (void) createMyClassInstance: (NSString*)withName{ name = withName; myVariable = 10; } - (int) changeVariable: (int)toAmount{ myVariable = toAmount; return toAmount; } @end /// End MyClass.h ///

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  • JAVA - Strange problem (probably thread problem) with JTable & Model

    - by Stefanos Kargas
    I am using 2 Tables (JTable) with their DefaultTableModels. The first table is already populated. The second table is populated for each row of the first table (using an SQL Query). My purpose is to export every line of the first table with it's respective lines of the second in an Excel File. I am doing it with a for (for each line of 1st table), in which I write a line of the 1st table in the Excel File, then I populate the 2nd table (for this line of 1st Table), I get every line from the Table (from it's Model actually) and put it in the Excel File under the current line of 1st table. This means that if I have n lines in first table I will clear and populate again the second table n times. All this code is called in a seperate thread. THE PROBLEM IS: Everything works perfectly fine ecxept that I am getting some exceptions. The strange thing is that I'm not getting anything false in my result. The Excel file is perfect. Some of the lines of the exceptions are: Exception in thread "AWT-EventQueue-0" java.lang.ArrayIndexOutOfBoundsException: 0 = 0 at java.util.Vector.elementAt(Vector.java:427) at javax.swing.table.DefaultTableModel.getValueAt(DefaultTableModel.java:632) at javax.swing.JComponent.paint(JComponent.java:1017) at javax.swing.RepaintManager.paint(RepaintManager.java:1220) at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:803) I am assuming that the problem lies in the fact that the second table needs some more time to be populated before I try to get any data from it. That's why I see RepaintManager and paintDirtyRegions in my exceptions. Another thing I did is that I ran my program in debug mode and I put a breakpoint after each population of the 2nd table. Then I pressed F5 to continue for each population of 2nd table and no exception appeared. The program came to it's end without any exceptions. This is another important fact that tells me that maybe in this case I gave the table enough time to be populated. Of course you will ask me: If your program works fine, why do you care about the exceptions? I care for avoiding any future problems and I care to have a better understanding of Java and Java GUI and threads. Why do you depend on a GUI component (and it's model) to get your information and why don't you recreate the resultset that populates your tables using an SQL Query and get your info from the resultset? That would be the best and the right way. The fact is that I have the tables code ready and it was easier for me to just get the info from them. But the right way would be to get everything direct from database. Anyway what I did brought out my question, and answering it would help me understand more things about java. So I posted it.

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  • .NET ORM and Security

    - by Sphynx
    We're going to use an ORM tool with a .NET desktop application. The tool allows creation of persistent classes. It generates all database tables automatically. In addition to other data, our system needs to store user credentials, and deliver access control. The question is, is there any possibility of access control by means of ORM, without creating the database authentication mechanisms manually? Is there any product on the market which allows this? We thought of limiting the access in the program itself, but users can easily access the database directly, and bypass the program limitations. Thanks.

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  • How to display a window on top with Java ?

    - by Frank
    I have the following code to display a message : JLabel A_Label=new JLabel("Updating channels ..."); A_Label.setFont(new Font("Times New Roman",0,16)); A_Label.setForeground(Color.BLUE); A_Label.setHorizontalAlignment(SwingConstants.CENTER); JOptionPane pane=new JOptionPane(A_Label); Object[] options=new String[]{"OK"}; pane.setOptions(options); JDialog dialog=pane.createDialog(new JFrame(),"Updating Channels"); dialog.setModal(false); dialog.setVisible(true); When the program runs, other windows displayed on top of it, how can I make it the top window ? I wonder if I can call "pane" or "dialog" to be on top ? Frank

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  • How to deploy and configure many copies of an application to multiple domains on the same server

    - by Oren
    We are about to begin work on an application that will eventually be deployed many times on one server. I am hoping to build a nice interface so that one of my coworkers can easily create new deployments of this application. The idea is to create a wizard with a series of options that will configure basic properties of each particular copy of the app such as color scheme, domain name, etc. Each copy of the application may be further tweaked independently down the line. I would like to know what is the best way to manage the automatic creation of users, the updating of domain name info and the deploying of copies of an application, with the ability to maintain certain discrepancies between each of these copies (such as installed plugins, different CSS) as we update the application in the future. What I'm asking is extremely similar to the way StackExchange 1.0 functioned, where a user could configure several options and a customized version of the StackExchange would soon be up and running. How is this accomplished?

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  • Python: Dynamic attribute name generation without exec() or eval()

    - by PyNewbie27
    Hi, I'm trying to dynamically create buttons at runtime with PyQT4.7 However, this being my first python program I'm not sure how to get the functionality I want. I would like to be able to substitute a text string for an attribute name: i.e. for each in xrange(4): myname = "tab1_button%s" % each #tab1_button0, tab1_button1, tab1_button2 #self.ui.tab1_button0 = QtGui.QPushButton(self.ui.tab) <--normal code to create a named button setattr(self.ui,myname,QtGui.QPushButton(self.ui.tab)) #rewrite of line above to dynamicly generate a button #here's where I get stuck. this code isn't valid, but it shows what i want to do self.ui.gridLayout.addWidget(self.ui.%s) % myname #I need to have %s be tab1_button1, tab1_button2, etc. I know the % is for string substituion but how can I substitute the dynamically generated attribute name into that statement? I assume there's a basica language construct I'm missing that allows this. Since it's my first program, please take it easy on me ;)

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  • Reading a file used by another process

    - by Tophe
    I know this has been up for discussion but I can't find an answer to my specific problem. I am monitoring a text file that is being written to by a server program. Every time the file is changed the content will be outputted to a window in my program. The problem is of course, that I can't use the Streamreader on the file as it is being "used by another process". Also setting up a Filestream with ReadWrite won't do any good since I cannot control the process that is using the file. However... You CAN open the file in notepad, so somehow it must be possible to access it even though the server is using it. Is there a good way around this? Should I monitor the file, make a temp copy of it when it changes, read the temp copy and the delete the temp copy. I need to get hold of the text in the file whenever the server changes it.

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  • Is JavaFx suitable for creating online multiplayer board/card games?

    - by Piniu
    In JavaFx i can easy create animations, moving pieces etc., but as far as i see there is better to write program logic and communication in java. Worst i see at the moment is calling javafx part as a result of data incoming from server. Is there any convenient way to do it or its better to change to other technology (flex, qt?) assuming it is not important if program will run in browser or outside as a standalone application? I just started to learn javafx but can drop it and move to other technology and consider c++ + wxWidgets or Qt which im more comforatable with.

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  • UISegmentedControl is hidden under the titleBar

    - by shay te
    i guess i am missing something with the UISegmentedControl and auto layout. i have a TabbedApplication (UITabBarController), and i created a new UIViewController to act as tab. to the new view i added UISegmentedControl, and place it to top using auto layout. i guess i don't understand completely something , cause the UISegmentedControl is hiding under the titleBar . can u help me understand what i am missing ? thank you . import Foundation import UIKit; class ViewLikes:UIViewController { override func viewDidLoad() { super.viewDidLoad() title = "some title"; var segmentControl:UISegmentedControl = UISegmentedControl(items:["blash", "blah blah"]); segmentControl.selectedSegmentIndex = 1; segmentControl.setTranslatesAutoresizingMaskIntoConstraints(false) self.view.addSubview(segmentControl) //Set layout var viewsDict = Dictionary <String, UIView>() viewsDict["segment"] = segmentControl; //controls self.view.addConstraints(NSLayoutConstraint.constraintsWithVisualFormat("H:|-[segment]-|", options: NSLayoutFormatOptions.AlignAllCenterX, metrics: nil, views: viewsDict)) self.view.addConstraints(NSLayoutConstraint.constraintsWithVisualFormat("V:|-[segment]", options: NSLayoutFormatOptions(0), metrics: nil, views: viewsDict)) } override func didReceiveMemoryWarning() { super.didReceiveMemoryWarning() // Dispose of any resources that can be recreated. } }

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