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  • How to convert a void pointer to array of classes

    - by user99545
    I am trying to convert a void pointer to an array of classes in a callback function that only supports a void pointer as a means of passing paramaters to the callback. class person { std::string name, age; }; void callback (void *val) { for (int i = 0; i < 9; i++) { std::cout << (person [])val[i].name; } } int main() { person p[10]; callback((void*)p); } My goal is to be able to pass an array of the class person to the callback which then prints out the data such as their name and age. However, the compile does not like what I am doing and complains that error: request for member 'name' in 'val', which is of non-class type 'void*' How can I go about doing this?

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  • defualt parameter values in arguments and inheritance

    - by sil3nt
    Hello there, Im having trouble with some Java, How do I give in default parameter values in java?. for example I have this in c++ DVD(int i, string t, int y, string d="Unknown"): Items(i,t,y),director(d){} and in Java I tried public Dvd(int i, String t,int y, String d="Unknown"){ super(i,t,y); director = d; } which fails to build. So how do I go about giving in default values? also In my main testing class I tried giving in 3 arguments insead of 4 but this fails also. How do I get around this problem?.

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  • Twisted Matrix and telnet server implementation

    - by ypercube
    I have a project which is essentially a game server where users connect and send text commands via telnet. The code is in C and really old and unmodular and has several bugs and missing features. The main function alone is half the code. I came to the conclusion that rewriting it in TwistedMachine could actually result in faster completement, besides other benefits. So, here is the questions: What packages and modules I should use? I see a "telnet" module inside "protocols" package. I also see "cronch" package with "ssh" and another "telnet" module. I'm a complete novice regarding Python.

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  • Can I make a pointer to the code, and pass to the next instruction?

    - by drigoSkalWalker
    Like this link http://gcc.gnu.org/onlinedocs/gcc-3.3.1/gcc/Labels-as-Values.html I can get the memory address of an label, so if I declare a label, get your address, and add your address, i will pass to next instruction? some ilustration int main () { void *ptr; label: instruction 1; instruction 2; ptr = &&label; // So if I do it... ptr = ptr + 1; // I will get the instruction 2 correct?? Thanks for all answers.

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  • Unit testing a functions whose purposes is side effects

    - by David
    How would you unit test do_int_to_string_conversion? #include <string> #include <iostream> void do_int_to_string_conversion(int i, std::string& s) { switch(i) { case 1: s="1"; break; case 2: s="2"; break; default: s ="Nix"; } std::cout << s << "\n"; } int main(int argc, char** argv){ std::string little_s; do_int_to_string_conversion(1, little_s); do_int_to_string_conversion(2, little_s); do_int_to_string_conversion(3, little_s); }

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  • Unable to Access the Dynamic control

    - by Avi
    Hello, I have created Views for Multiview dynamically . In the view control I have a Gridview control which has a checkbox control. I have a button in the main aspx page on click of which it will check(if checked or not) for all the checkbox and fetch the corresponding row from the gridview. The view is for tabbed menu. In each tab the the gridview populates the data in the runtime. Have defined the dynamic control in Page_PreInit. I'm not able to access the checkbox . How would I achieve this . Thanks

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  • Using PHP's exec() function (or the likes), how can you display terminal error output?

    - by Miciah Amberong
    Previous Reference I am just wondering if there's a way (using PHP) to output the compile error information from the terminal to the browser? For example: If you use this code to execute in the terminal... gcc -o try try.c ...and assuming the "try.c" have some errors. The terminal will output something like this: try.c In function 'main': try.c:27 'x' undeclared (first use in this function) try.c:27 (Each undeclared identifier is reported only once try.c:27 for each function it appears in.) Meanwhile, using this PHP code... <?php exec("gcc -o try try.c"); ?> The browser does not return any output like the terminal does. Is there a possible way direct or indirect that the error details that the terminal showed can be passed to the be displayed on a browser? Thank you very much.

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  • how to controller (start/kill) a background process (server app) in ruby

    - by rubiii
    hey guys, i'm trying to set up a server for integration tests (specs actually) via ruby and can't figure out how to control the process. so, what i'm trying to do is: run a rake task for my gem that executes the integration specs the task needs to first start a server (i use webrick) and then run the specs after executing the specs it should kill the webrick so i'm not left with some unused background process webrick is not a requirement, but it's included in the ruby standard library so being able to use it would be great. hope anyone is able to help! ps. i'm running on linux, so having this work for windows is not my main priority (right now).

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  • How do I find the speed of an in-progress file upload in cURL?

    - by cinek1lol
    I'd like to know how to check out the speed of a file being uploaded in real time using the cURL library in C++. This is what I have written: void progress_func(void* ptr, double TotalToDownload, double NowDownloaded, double TotalToUpload,double NowUploaded) { cout<<NowUploaded<<endl; } //... int main() { //... curl_easy_setopt(curl, CURLOPT_PROGRESSFUNCTION, progress_func); } But the manual says that it shows average speed, but even this doesn't seem to work with me, because too mach fast is end. How to good write or A well-calculated?

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  • qmake library reordering

    - by user1095108
    I put this into a qmake file: QTPLUGIN += component LIBS += -L../lib -lmodule -lcomponent -lnetworking But qmake reorders the libraries behind my back: g++ -m64 -Wl,-O1,--sort-common,--as-needed,-z,relro -o testb .obj/constants.o .obj/main.o .obj/qrc_application.o -L/usr/lib -L../lib -lmodule -lnetworking -lcomponent -lQtGui -lQtNetwork -lQtCore -lpthread Probably because component is a static plugin. But it has a static dependency on the networking library and hence the reordering causes a link error. It is a static dependency and hence is ok in my opinion. How to work around this? I'm using qt 4.8.1.

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  • ModX navigation menu with "wayfinder" snippet

    - by user1219432
    I have a main navigation at the top of the site. And a subnavigation at left of my site. For example: At the top there are these topics: Cars | Trees | Jobs | ... So when you click on "Jobs" there should be the subnavigation of "Jobs" at left, like... Construction Jobs Engineering Jobs Retail Jobs ... The first (top) navigation is easy to achieve: [[!Wayfinder? &startId=0 &level=1 ]] How can I realize the second navigation, so that only the documents are listed that are under the parent document?

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  • Trouble with Perfect Scrollbar jQuery

    - by coolpup
    I'm using the Perfect Scrollbar jQuery app (http://www.yuiazu.net/perfect-scrollbar/) for this site: http://thehummingbirdplace.com/ The scrollbar shows up when you hover over the News section, but it won't scroll down to reveal the content. I've used this scrollbar before successfully, so I'm stumped as to what is different now. I haven't been able to replicate this on a simpler page, when I experiment on another page it either works or just vanishes, so I'm not sure why it is successfully showing up, yet not scrolling on the main page. Any help would be appreciated!!

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  • How to add types from external assembly to toolbox control? (WPF)

    - by Louis Rhys
    I am trying to do something like this in my WPF application: ToolboxControl ctrl = new ToolboxControl(); Assembly assembly = Assembly.LoadFile(file); var category = new ToolboxCategory(assembly.GetName().Name); foreach (Type t in assembly.GetTypes()) { var wrapper = new ToolboxItemWrapper(t, t.Name); category.Add(wrapper); } ctrl.Categories.Add(category); i.e. adding ToolboxItemWrappers for each type found in an assembly. However the last line throws the following exception (see image) All dependencies of the external assembly are also referenced in the main (WPF) application. So what's wrong here and how to fix it?

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  • Can I expand macro JUST ONE TIME in specific target?

    - by naive231
    A = "demo" %.o:%.cpp $(CC) -c $^ $(A) -o $@ default:$(all_objs) game:A = $(shell read -p 'Enter game version: ' gv && echo $$gv) game:$(all_objs) Just a snippet makefile above. If I make game, main problem is each compilation of sources will expand $(A) and it will request user to input game version over and over. $(A) has default content "demo" only if user doesn't make game target. So, is there any way to set $(A) to be expanded && ?

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  • Loading Nested JS Files on the Page

    - by Aidin
    Hi, I have a JS file that is dependent to another Js file. this Js file is something like this (Common.js) //Some codes here window.onload = PageLoad; //some codes here and then I implement PageLoad function in another Js file. ( I do this because every page has its own PageLoad implementation) and I Load these files like this on my Main.aspx : `<asp:Content ID="Content1" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">` `<\script language="javascript" type="text/javascript" src="PagesJS/pgeMain.js"></script>` `<\script language="javascript" type="text/javascript" src="JS/Common.js"></script>` ... ... `</asp:Content>` Every thing works fine on local but when I deploy it, sometimes I get PageLoad undefined Error! Can any one tells me what is wrong with this? Thanks. Aidin

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  • I have an Xcode static library project, how do I add a test target to it so I can run it there? (Ins

    - by zekel
    I want to be able to test library code in the library target so I don't have to switch over to a separate project to run it. I see how to add a target, but I'm not sure how to set it up to run like the "Command Line Tool" project template does. I tried adding a new "Shell Tool" target, but I don't know how to make it run like one. What build settings do I have to add to that target? What files (main.m?) do I need to start it up?

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  • Fickle IE Issues with Height:100%'

    - by Mike R
    I am trying to set the height to 100% in the viewport for Internet Explorer. As you might imagine, the following code works everywhere else: * { margin: 0; padding: 0; } html, body { height: 100%; } body { font-family: Times New Roman, Times, serif; font-size: 13px; background-color:#E8E8E8; background:url(/images/background.png) repeat-x; } #wrap { margin:0 auto; width: 935px; /* Change to desired width :) */ min-height: 100%; background:url(/images/content.png)repeat-y; } #main { overflow: auto; padding-bottom: 112px; } /* must be same height as the footer */

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  • Can somebody explain the difference between exceptions and errors (specific to PHP)?

    - by letseatfood
    I am having trouble figuring the best way to display errors to my clients. Should I use exceptions or errors? For example, if the user's login information does not match the database, should I throw new Exception('Login information is incorrect. Please try again.') and catch it with an exception handler using set_exception_handler()? Or, should I use trigger_error() to display an error message to the user? I think the main issue is that I cannot differentiate between errors and exceptions. I have read a lot of "answers" to this question on the internet and in some books, but it seems that people are really divided or aren't sure. Thanks!

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  • Making application menus on top of gnome shell

    - by GAP
    Is there a way to put gnome shell components (panel, message tray) to be appear below the popup menu's of other applications such as Java and Gtk Apps. The problem is when there are gtk apps which has tray icons the popup menu tends to appear below the message tray, this was bit ok now in 3.6 because the message tray hides soon as the icon is clicked. But the top bar is still a problem for large menus. When running eclipse with lot of options in the context menu the top most items including the scroll button are under top bar. Is there any thing i can change in the main.js or panel.js to get things below the popup menus ?

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  • mod_rewrite per-dir redirection returning a 400

    - by Eaterrust
    I moved my images directory to a different folder, and now I want to redirect all images requests from that folder to the new one. I do not have access to the main configuraion file, so I'm doing this in a .htaccess. I tried this, and it works:     RewriteCond %{REQUEST_URI} old_dir/.+.(jpg|png|gif)$     RewriteRule old_dir/(.+[^/]+..+)$ $1 [L,PT] But since they have permanently moved, I want to do a proper redirect, so I added the [R] flag, like this:      %{REQUEST_URI} old_dir/.+.(jpg|png|gif)$     RewriteRule old_dir/(.+[^/]+..+)$ $1 [L,PT,R] But the server gets confused, and returns a 400, so I looked at the log file, and this is what happens:     strip per-dir prefix: C:/wamp/www/natrazyle/old_dir/images/banner.jpg - old_dir/images/banner.jpg     applying pattern 'old_dir/(.+[^/]+..+)$' to uri 'old_dir/images/banner.jpg'     rewrite 'old_dir/images/banner.jpg' - 'images/banner.jpg'     add per-dir prefix: images/banner.jpg - C:/wamp/www/natrazyle/images/banner.jpg     explicitly forcing redirect with http://localhost/C:/wamp/www/natrazyle/images/banner.jpg As you can see, the full local path gets added after localhost I know I'm doing something wrong, I just can't figure it out myself. Any help would be greatly appreciated...

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  • Change div order in CSS or javascript

    - by Sam Holder
    say I have layout like so: <div id="main"> <div id="NormalContent"> {some content which is a fixed length list} </div> <div id="FeaturedContent"> {some content which may contain a long list} </div> </div> and I want to place FeaturedContent above NormalContent. Can I do this with CSS? I assume I can with Javascript?

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  • Writing an OS for Motorola 68K processor. Can I emulate it? And can I test-drive OS development?

    - by ulver
    Next term, I'll need to write a basic operating system for Motorola 68K processor as part of a course lab material. Is there a Linux emulator of a basic hardware setup with that processor? So my partners and I can debug quicker on our computers instead of physically restarting the board and stuff. Is it possible to apply test-driven development technique to OS development? Code will be mostly assembly and C. What will be the main difficulties with trying to test-drive this? Any advice on how to do it?

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  • Lightweight open source CMS - current situation

    - by patrikas
    Hello, It happened that I need to pick up PHP based open source CMS. I did a small research and found many candidates. CMS made simple seems to be right choice, but I am not sure what's the current state, I know it was widely used time ago. I need it to be fully compliant with web standarts, lightweight (especially interface). It needs to be as simple as possible - basically just style and page content editing (news, maybe some image gallery) is enough. Sure content and style have to be separated from each other since content will be edited by non-programmer. One of the main goals is SEO so I'd like it to have friendly URLs. I think CMSes like Joomla, Drupal and Wordpress are too big for this project. Are there any recommendations ?

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  • java-maven2: How to include the a jar as depedency in pom so that I will be able to access test clas

    - by flavour-of-bru
    Hi, I have a set of functional jars(more than 3) that tests my source code. These jars just contains test classes and assisting asserter classes. I am creating a new performance jar that would import all the functional tests from these jars so that all can be run simultaneously. But when I include them as test dependencies in pom of current jar, what all I get to see is the classes in src/main/java. How can I include these functional jars as dependent jars so that I can also reference classes in src/test/java. In other words, how do I reference the test classes in other jars. In what way should I include the dependency as. Thanks for your support.

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  • WPF data binding issue .

    - by Praveen
    Hi All, I have a wpf app and there i simply have a dock panel and inside dock panel i have a textblock. I want to bind the text property of textblock to my custom objects property but that' not working. I think i am missing something here but don't know what. Here is the code snippet. <TextBlock Text="{Binding Source=myDataSource, Path=ColorName}"/> </DockPanel> My custom class. class MyData { public string ColorName { get; set; } } and main window constructor.. public partial class MainWindow : Window { MyData myDataSource; public MainWindow() { InitializeComponent(); myDataSource = new MyData { ColorName = "Red" }; } }

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