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  • How can I reverse ruby's include function.

    - by Glen
    I'll explain what i'm looking for in code as thats probably the most succinct: module Mixin def method puts "Foo" end end class Whatever include Mixin end w = Whatever.new w.method => "Foo" # some magic here w2 = Whatever.new w.method => NoMethodError I had tried just undefining the Mixin module using remove_const, but this doesn't seem to make any difference to Whatever. I had assumed that #include just added a reference to the module into the class's method resolution chain - but this behaviour doesn't agree with that. Can anyone tell me what include actually does behind the scenes, and how to reverse this?

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  • without including #include<ctype.h>

    - by venkat
    Hi,i am written below program .... without including #include also i am able to execute the program.... where these prototype are declare? 1) include int main() { if(isalnum(';')) printf("character ; is not alphanumeric"); if(isalnum('A')) printf("character A is alphanumeric "); return 0; } 2) include int main() { printf("Lower case of A is %c \n", tolower('A')); printf("Lower case of 9 is %c \n", tolower('9')); printf("Lower case of g is %c \n", tolower('g')); printf("ASCII value of B is %d \n", toascii('B')); printf("Upper case of g is %c \n", toupper('g')); return 0; }

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  • run the script only once?

    - by fusion
    being new to php and coming from asp.net, i would like to know if there is an equivalent of IsPostBack, which calls a function or a method only once, once the user is logged in. i have a facebook application, in which once the user authorizes the application it should enter his details in the database. this basic stuff should have been done using the post-authorize callback url which facebook pings when the user first authorizes the app, but somehow that is not working; hence i have to do it manually. the issue is that, since i'm checking whether the user exists or not in index.php, i would not like index.php to run this code repeatedly for the same user when the user goes to the homepage every time. any ideas?

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  • Include in enity framework 4

    - by molgan
    Hello I've been using enity framework that came with 3.5sp. And now I've redone things for enityframework 4 and asp.net mvc 2. I've come across something (which worked in my previous version and asp.net mvc 1.0). I have this: public IQueryable<Booking> GetBookings() { return from b in _entities.Bookings.Include("BookingObject") select b; } And in my controller I have: return View("Index", new BookingsViewModel { Bookings = _br.GetBookings().ByDay(DateTime.Today) }); And it doesnt seem to include the "BookingObject"-entity, so I can type like <%= Model.Bookings.BookingObject.BookingObjectName %> in my view. What might be missing here? Do I need to turn something on in the diagram for it to include entities or? /M

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  • How to install matplotlib on OS X?

    - by Paperflyer
    I want to install matplotlib on OS X. If possible, using homebrew. I installed Python 2.7.1 using brew install python, I modified my path to use it I installed pip using brew install pip I installed numpy 1.5.1 using pip install numpy I installed scipy 0.8.0 using pip install scipy This is where it gets hairy. pip install matplotlib will fetch the wrong version of matplotlib, which is incompatible with the recent version of numpy. The solution is to fetch the correct version of matplotlib manually: pip install -f http://sourceforge.net/projects/matplotlib/files/matplotlib/matplotlib-1.0.1/matplotlib-1.0.1.tar.gz matplotlib But, that version fails to compile since it can't find the freetype headers: In file included from src/ft2font.cpp:1: src/ft2font.h:14:22: error: ft2build.h: No such file or directory These headers are actually installed in /usr/X11/include as part of the X11 developer tools. So, how can I make matplotlib use these headers?

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  • Xerces C++ SAX Parsing Problem: expected class-name before '{' token

    - by aduric
    I'm trying to run through an example given for the C++ Xerces XML library implementation. I've copied the code exactly, but I'm having trouble compiling it. error: expected class-name before '{' token I've looked around for a solution, and I know that this error can be caused by circular includes or not defining a class before it is used, but as you can see from the code, I only have 2 files: MySAXHandler.hpp and MySAXHandler.cpp. However, the MySAXHandler class is derived from HandlerBase, which is included. MyHandler.hpp #include <xercesc/sax/HandlerBase.hpp> class MySAXHandler : public HandlerBase { public: void startElement(const XMLCh* const, AttributeList&); void fatalError(const SAXParseException&); }; MySAXHandler.cpp #include "MySAXHandler.hpp" #include <iostream> using namespace std; MySAXHandler::MySAXHandler() { } void MySAXHandler::startElement(const XMLCh* const name, AttributeList& attributes) { char* message = XMLString::transcode(name); cout << "I saw element: "<< message << endl; XMLString::release(&message); } void MySAXHandler::fatalError(const SAXParseException& exception) { char* message = XMLString::transcode(exception.getMessage()); cout << "Fatal Error: " << message << " at line: " << exception.getLineNumber() << endl; XMLString::release(&message); } I'm compiling like so: g++ -L/usr/local/lib -lxerces-c -I/usr/local/include -c MySAXHandler.cpp I've looked through the HandlerBase and it is defined, so I don't know why I can't derive a class from it? Do I have to override all the virtual functions in HandlerBase? I'm kinda new to C++. Thanks in advance.

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  • PHP: how to access variables inside a function that have been declared outside of it?

    - by Chris
    Please, I am very new and have not been confronted with OOP and all this related stuff, which I guess may be related to this issue (public, private, ...). So, any help and suggestions are very appreciated! :) At the very beginning of each page I include a file that starts the SESSION etc, lets call it session.php. In this file session.php, I include a file that contains a function, let's call it function1.php, because I need the function to be available in session.php. However, later in the main page I also include function2.php which needs to access variables set in session.php, so I additionally tried to include session.php in function2.php. The problem is that an error occurs as function1 will be declared multiple times... Fatal error: Cannot redeclare function1() (previously declared in ... So, what would be a more elegant and clean(er) solution for this? How could you solve it? Basically, I'd need to access variables inside a function that have been included in the main page before... Thank you very much in advance!

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  • C++ socket protocol design issue (ring inclusion)

    - by Martin Lauridsen
    So I have these two classes, mpqs_client and client_protocol. The mpqs_client class handles a Boost socket connection to a server (sending and receiving messages with some specific format. Upon receiving a message, it calls a static method, parse_message(..), in the class client_protocol, and this method should analyse the message received and perform some corresponding action. Given some specific input, the parse_message method needs to send some data back to the server. As mentioned, this happens through the class mpqs_client. So I could, from mpqs_client, pass "this" to parse_message(..) in client_protocol. However, this leads to a two-way association relationship between the two classes. Something which I reckon is not desireable. Also, to implement this, I would need to include the other in each one, and this gives me a terrible pain. I am thinking this is more of a design issue. What is the best solution here? Code is posted below. Class mpqs_client: #include "mpqs_client.h" mpqs_client::mpqs_client(boost::asio::io_service& io_service, tcp::resolver::iterator endpoint_iterator) : io_service_(io_service), socket_(io_service) { ... } ... void mpqs_client::write(const network_message& msg) { io_service_.post(boost::bind(&mpqs_client::do_write, this, msg)); } Class client_protocol: #include "../network_message.hpp" #include "../protocol_consts.h" class client_protocol { public: static void parse_message(network_message& msg, mpqs_sieve **instance_, mpqs_client &client_) { ... switch (type) { case MPQS_DATA: ... break; case POLYNOMIAL_DATA: ... break; default: break; } }

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  • RIA Services query: Nested "from" and include children

    - by Stéphane Bebrone
    Hi guys, I have the following schema. What I'd like to do is to retrieve all customers (and children properties) from a selected StaffAssignment by StaffId. So I've written the following query: from c in ObjectContext.Customers.Include("Assignments.Activities") from a in c.Assignments from sa in a.StaffAssignments where sa.StaffId == staffId select c But children properties aren't loaded (I added the [Include] in service metadata file as well). What did I do wrong? Gtz, Stéphane.

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  • php includes that include another php file

    - by Emma
    I'm getting really muddled up now and my brain hurts! :( lol Root: index.php Includes: cat.php dog.php index includes dog: include("includes/dog.php"); dog includes cat: include("cat.php"); When I run index, for cat it says: A link to the server could not be established Access denied for user ... However, if I run dog, I get no problems... I'm guessing its the path, but i've tried ./includes/cat.php to no joy...

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  • gstreamer libary unresolved include

    - by user300990
    Hi I wrote a simple C code with gstreamer libs( gstreamer example code manual ref ) The gstreamer headers are into /usr/include/gstreamer-0.10/gst into my C code I wrote: include "gstreamer-0.10/gst/gst.h" I have this error: there are unresolved includes inside How to solve the problem? I thank you...

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  • XCode newb -- #include can't find my file

    - by morgancodes
    I'm trying to get a third party audio library (STK) working inside XCode. Along with the standard .h files, many of the implimentation files include a file called SKINI.msg. SKINI.msg is in the same directory as all of the header files. The header files are getting included fine, but the compiler complains that it can't find SKINI.msg. What do I need to do to get XCode to happily include SKINI.msg?

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  • Prevent UIGestureRecognizer from firing selector more than once

    - by JK
    I utilize a UILongPressGestureRecognizer in my app. This is a continuous gesture recognizer which means it continuously fires the selector for the target it was initialized with. I would like the selector to be fired only once. I have tried to prevent further selectors being fired by setting the gesture recognizer's enabled property to Note the first time the selector is fired, but this only takes effect after the selector is fired again. How can I ensure the selector is fired only once?

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  • Entity framework not loading relationship even when using include

    - by dilbert789
    I have this code: Category selectedCategory = (from c in DB.Category.Include("SubCategory") join a in DB.Accessory on c.AccCatUID equals a.Category.AccCatUID where a.AccUID == currentAccessory.AccUID select c).FirstOrDefault(); It works fine, selectedCategory gets populated as expected. BUT selectedCategory has a child table 'SubCategory' which does not get loaded even though there is the include there. It is not loaded until I do this: selectedCategory.SubCategory.Load(); Why do I have to call load explicitly in order to load the child table?

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  • Makefile: finding include/lib for libraries installed through macports

    - by Henk
    Libraries/include files installed by macports go in /opt/local/lib and /opt/local/include, neither of which are scanned by gcc/ld by default. As a result, a project I'm working on won't compile in that environment. Should this be fixed by manually adding -L/opt/local/lib to my Makefile's LDFLAGS (and -I... as well), or is there some configuration that should be done to fix this globally on the computer?

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  • C/C++ include file order/best practices

    - by aaa
    Hello. Is there recommended order in which include files should be specified? For example, the system files, STL, Boost, go before of after local include files? is there a particular reason to choose one or another? Thanks

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  • Are .dll files loaded once for every program or once for all programs?

    - by Nilbert
    I have a simple small question which someone who knows will be able to answer easily, I searched google but couldn't find the answer. There are many programs running at once on a computer, and my question is: when a program loads a DLL, does it actually load the DLL file or does it find the memory in which the DLL is already loaded? For example, is ws2_32.dll (winsock 2) loaded for every program that uses winsock, or is it loaded once and all programs that use it use the same memory addresses to call the functions?

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  • distutils setup does not include data_files

    - by StackUnderflow
    I am new to distutils.. I am trying to include few data files along with the package.. here is my code.. from distutils.core import setup setup(name='Scrapper', version='1.0', description='Scrapper', packages=['app', 'db', 'model', 'util'], data_files=[('app', ['app/scrapper.db'])] ) The zip file created after executing python setup.py sdist does not include the scrapper.db file. I have scrapper.db file in the app directory.. thanks for the help.

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  • Playing Multiple Sounds at Once in Qt

    - by Ben
    I'm trying to play background music along with sound effects using Qt. However, I can't get more than one sound to play at once. For example: QSound::play("Music.wav"); QSound::play("Effect.wav"); When this code is run (on Windows), you can hear Music.wav just start to play, but then it stops and Effect.wav plays. Is there any way to get the two sounds to play at once?

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