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  • forward declare typedef'd struct

    - by Steve
    I can't figure out how to forward declare a windows struct. The definition is typedef struct _CONTEXT { .... } CONTEXT, *PCONTEXT I really don't want to pull into this header, as it gets included everywhere. I've tried struct CONTEXT and struct _CONTEXT with no luck (redefinition of basic types with the actuall struct in winnt.h.

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  • Catching an exception class within a template

    - by Todd Bauer
    I'm having a problem using the exception class Overflow() for a Stack template I'm creating. If I define the class regularly there is no problem. If I define the class as a template, I cannot make my call to catch() work properly. I have a feeling it's simply syntax, but I can't figure it out for the life of me. #include<iostream> #include<exception> using namespace std; template <class T> class Stack { private: T *stackArray; int size; int top; public: Stack(int size) { this->size = size; stackArray = new T[size]; top = 0; } ~Stack() { delete[] stackArray; } void push(T value) { if (isFull()) throw Overflow(); stackArray[top] = value; top++; } bool isFull() { if (top == size) return true; else return false; } class Overflow {}; }; int main() { try { Stack<double> Stack(5); Stack.push( 5.0); Stack.push(10.1); Stack.push(15.2); Stack.push(20.3); Stack.push(25.4); Stack.push(30.5); } catch (Stack::Overflow) { cout << "ERROR! The stack is full.\n"; } return 0; } The problem is in the catch (Stack::Overflow) statement. As I said, if the class is not a template, this works just fine. However, once I define it as a template, this ceases to work. I've tried all sorts of syntaxes, but I always get one of two sets of error messages from the compiler. If I use catch(Stack::Overflow): ch18pr01.cpp(89) : error C2955: 'Stack' : use of class template requires template argument list ch18pr01.cpp(13) : see declaration of 'Stack' ch18pr01.cpp(89) : error C2955: 'Stack' : use of class template requires template argument list ch18pr01.cpp(13) : see declaration of 'Stack' ch18pr01.cpp(89) : error C2316: 'Stack::Overflow' : cannot be caught as the destructor and/or copy constructor are inaccessible EDIT: I meant If I use catch(Stack<double>::Overflow) or any variety thereof: ch18pr01.cpp(89) : error C2061: syntax error : identifier 'Stack' ch18pr01.cpp(89) : error C2310: catch handlers must specify one type ch18pr01.cpp(95) : error C2317: 'try' block starting on line '75' has no catch handlers I simply can not figure this out. Does anyone have any idea?

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  • Soon to be PhD in Computer Science - Which Path to Follow?

    - by mttr
    I am going to submit my PhD thesis within the next six months. My PhD is on managing the availabiity of large-scale distributed systems, so I have some experience actually building non-trivial systems (+ I have four years experience working as a programmer). I am now trying to figure out what I should do following the PhD. I enjoy research (a quick definition: identify problem, come up with solution, ask interesting questions, find ways to answer them, build system, experiment, contribute some new knowledge and publish). I also like teaching and supervising students. It would seem that a career in academia is the ideal thing to do (can work on non-trivial problems and contribute something of use to some or more people). However, a career in academia has two significant drawbacks. First, it can be difficult to gain access to real systems with real users which then display real problems. This creates the danger that you do work that seems important (to you and maybe to some of your colleagues), but is not really relevant to anything or anyone. Second, the pay is pretty sad. Apparently, you have to sacrifice this for the privilege of doing research. I enjoy programming, but don't just want to hack some web-based system for the rest of my life. That is, working in IT for a bank is not a future I see myself enjoying. I want to work on interesting problms (that's difficult to define clearly): things where you don't know how to start, that take some time to figure out and attack, that require a rigorous approach to demonstrate that the problem has been solved, and problems that need a solution in the real world. Give the experience of people on stackoverflow, what do you think suitable options are and why (or alternatively, what gaps in my thinking does the above reveal)? Is industrial research (aka IBM Research, Microsoft Research) the only alternative avenue to a career in academia? What other areas, companies, occupations, etc. could provide me with stimulating, inspiring work? Which regions, countries am I most likely to find such work? Please share your experience.

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  • How do you access/configure summaries/snippets in Django Haystack

    - by mlissner
    I'm working on getting django-haystack set up on my site, and am trying to have snippets in my search results roughly like so: Title of result one about Wikis ...this special thing about wiki values is that...I always use a wiki when I walk...snippet value three talks about wikis too...and here's another snippet value about wikis. I know there's a template tag for highlighting, but how do you generate the snippets themselves? I know Solr generates these, but I can't figure out how to get them from Haystack.

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  • JQuery overriding the themeroller style

    - by Paul Connolly
    Hi, In my accordian control I want to override the header style to show a red background instead of the default theme colour if ever the user control (e.g user's name and address input) in that particular pane returns a validation boolean of false. I'm ok with how to use .Toggle to change the class but can't figure out how to grab the themeroller class in the first place. How would I do this? Thanks Paul

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  • Sound File editing in Objective C

    - by Biranchi
    Hi All, I am able to record and create audio files using AudioFileCreateWithURL in the AudioToolbox Framework. I want to figure out if there is any way to edit the .caf sound files. I want to insert another recoreded audio inside the main audio file. Any thoughts or suggestions how to proceed ?? Thanks.

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  • Fetch excerpt from Wikipedia article?

    - by Felix
    I've been up and down the Wikipedia API, but I can't figure out if there's a nice way to fetch the excerpt of an article (usually the first paragraph). It would be nice to get the HTML formatting of that paragraph, too. The only way I currently see of getting something that resembles a snippet is by performing a fulltext search (example), but that's not really what I want (too short). Is there any other way to fetch the first paragraph of a Wikipedia article than barbarically parsing HTML/WikiText?

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  • 404 Pages in ASP.NET MVC

    - by Maxim Z.
    I'm building my first ASP.NET MVC website, and I'm trying to figure out how to implement a 404 page. Should I create a controller called "404Controller?" If so, how do I then register this Controller with IIS so that it redirects 404s to that page? Also, in a situation where something is not found (in the database, for example) by some other Controller code, how would I redirect the request to my 404 page?

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  • Compilation errors for a c api

    - by sam
    What would be the reason for the following errors though the syntax was right and I have included the coreservices framework in which some data type and constants are declared. " c.c:22: error: syntax error before ‘CFFileDescriptorRef’ c.c:22: warning: no semicolon at end of struct or union c.c:24: error: syntax error before ‘}’ token c.c:24: warning: data definition has no type or storage class lipo: can't figure out the architecture type of: /var/folders/fF/fFgga6+-E48RL+iXKLFmAE+++TI/-Tmp-//ccFzQIAj.out "

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  • Accessing the project system from a Visual Studio MEF Editor extension

    - by Daniel Plaisted
    I'm writing a Visual Studio editor extension using the VS 2010 SDK RC. I'd like to be able to figure out what the references of the current project are. How do I get access to the project corresponding to the current editor? The documentation on editor extensions doesn't seem to include information on how to access non-editor parts of Visual Studio. I did some searching and it looks like in VS2008 you could write add-ins that would access the project system, but I'm trying to get at this functionality from a MEF editor extension.

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  • "Correct" way to playback user movement with xlib?

    - by Dasuraga
    I'm trying to figure out a way to make demos for a program I've written with xlib, and I came across this, but, according to the author page: This extension is not intended to support general journaling and playback of user actions. Does anyone know of any functions in xlib that are intended to support playback of user actions? Does it even exist? Or could I just use this without any real problems?

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  • Drawing A Piano

    - by Jonathan M.
    Hello Everyone, I have started working on a software synthesizer (or keyboard). I have decided to use Java because of the available Jfugue API. I am trying to figure out how to go about creating the actual keys (notes) of the keyboard user interface, but I am stuck. I have tried to create an interface by dragging/dropping black and white rectangular buttons onto the panel, but that doesn't seem to work. Could someone point me into the right direction?

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  • Lisp Executable

    - by Alexander Stolz
    I've just started learning Lisp and I can't figure out how to compile and link lisp code to an executable. Im using clisp and "clisp -c" produces two files .fas and .lib, what do I do next to get an exeutable?

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  • Shoulda: How would I use an instance variable outside of a setup or should block?

    - by TheDeeno
    I'm trying to do something like the following: @special_attributes = Model.new.methods.select # a special subset @special_attributes.each do |attribute| context "A model with #{attribute}" setup do @model = Model.new end should "have some special characteristic" assert @model.method(attribute).call end end end However, @special_attributes is out of scope when running the unit tests, leaving me with a nil object on line 2. I can't figure out where to define it to bring it in scope. Any thoughts?

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  • jQuery: How can I check if a block in my document is inside the viewport or outside of it?

    - by Jannis
    I am basically trying to trigger a function if the footer is inside the viewport. How can I check whether the footer is currently visible in the viewport? I assume I will have to put it into the $(window).scroll() event so that the listener becomes true once the footer becomes visible but what the function should be I just can't figure out. Any help would be much appreciated. Thanks for reading, Jannis

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  • clear view of box model

    - by Abhimanyu
    As far as i know every element in HTML associated with padding(left, right, top, bottom) , margin(left, right, top, bottom) which will create the box model for that so that we can figure it out its actual position with respect to document. any idea over it?

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  • How to bulk insert from CSV when some fields have new line character?

    - by z-boss
    I have a CSV dump from another DB that looks like this (id, name, notes): 1001,John Smith,15 Main Street 1002,Jane Smith,"2010 Rockliffe Dr. Pleasantville, IL USA" 1003,Bill Karr,2820 West Ave. The last field may contain carriage returns and commas, in which case it is surrounded by double quotes. I use this code to import CSV into my table: BULK INSERT CSVTest FROM 'c:\csvfile.csv' WITH ( FIELDTERMINATOR = ',', ROWTERMINATOR = '\n' ) SQL Server 2005 bulk insert cannot figure out that carriage returns inside quotes are not row terminators. How to overcome?

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  • Python learner needs help spotting an error

    - by Protean
    This piece of code gives a syntax error at the colon of "elif process.loop(i, len(list_i) != 'repeat':" and I can't seem to figure out why. class process: def loop(v1, v2): if v1 < v2 - 1: return 'repeat' def isel(chr_i, list_i): for i in range(len(list_i)): if chr_i == list_i[i]: return list_i[i] elif process.loop(i, len(list_i) != 'repeat': return 'error'()

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  • Optional parameters in Visual Studio 2008 Crystal Reports

    - by Andrew
    I am developing a Crystal Report in Visual Studio 2008. I am trying to implement optional parameters so that a user does not have to specify a value or range for a particular field. Essentially, this means there is no filtering done on that field if the user wishes. However, I can't seem to figure out how to do this. Does anyone have any ideas? Let me know if more information is required.

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  • Enterprise ASP.NET MVC application architecture

    - by Ben
    I am still trying to figure out the right architecture for a complex ASP.NET MVC web application. I looked in a lot of example code and everywhere it's done differently. I would really appreciate your thoughts on this. Another Question: Would you use Linq to SQL or the Entity Framework? Thanks, -Ben

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