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• An interview question

  - by maddy

  Hi, The questions shown below is an interview question Q)You are given have a datatype, say X in C. The requirement is to get the size of the datatype, without declaring a variable or a pointer variable of that type, And, of course without using sizeof operator ! I am not sure if this question was asked before in SO. Thanks and regards Maddy

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• Creating a console in Java

  - by DeadMG

  When I try to use java.lang.System.console(), I get a null pointer. I can still write to out and read from in, but this only works when I run straight from my IDE. When I run the .jar file directly, nothing happens. How can I create a console like I'd see using std::cout for use in Java?

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• Pointers to threads

  - by viswanathan

  Suppose i have pointer to a thread like this CWinThread *m_pThread = AfxBeginThread(StartThread, this, THREAD_PRIORITY_NORMAL, 0, 0); Now in my StartThread function assume i did all operations and the function returned like this UINT CClassThread::StartThread(LPVOID pVoid) { return true; } Will my m_pThread be invalid when the return statement is executed?

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• Is there anything like a generic list in Cocoa / Objective-C?

  - by Holli

  What I really like in C# are generic lists. A list that can contain only one type of objects. Is there something like a generic list in Cocoa/Objective-C? As far I only know NSArray who will take a pointer to any object.

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• How to composite argb image data on top of xrgb image data

  - by Mr Bell

  I have a pointer to an 32bit argb image's pixel data and a 32bit xrgb image's pixel data. How can I composite the argb on top of xrgb image while making use of the alpha component? Visual Studio 2008 C++

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• NullPointerException when thying to add an object to a PriorityQueue

  - by meagan

  i keep getting a null pointer exception when trying to add an object to a priority queue i initialize the queue: private PriorityQueue<NodeObject> nodes; and here i try to add to it: NodeObject childNode = new NodeObject(child, 1); nodes.add(childNode); why doesn't this work? i know my NodeObject is not null because i create it right before i add it.

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• Cocoa equivalent of diskEvt/kEventClassVolume?

  - by tewha

  We have a drop-down menu of volumes in our UI, and I'd like to update it when a new disk is mounted. In the Classic days, this would involve watching for a diskEvt event. In Carbon, I think this was kEventClassVolume. What's the Cocoa equivalent? (A pointer into Apple's documentation on this would satisfy the question. I've been unable to find anything!)

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• return an address of a double

  - by bks

  i'm having an issue understanding why the following works: void doubleAddr(double* source, double** dest) { *dest = source; } i get a pointer to a double and want to change the double that dest points to: //usage: int main() { double* num; double* dest; doubleAddr(num, &dest); return 0; } thanks in advance

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• .NET: What is the object header used for?

  - by Jonathan Allen

  In .NET there are 8 bytes of overheard for each object. 4 bytes are a pointer to the object's type. What are the other 4 bytes, known as the object header, used for?

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• How to place an image by dragging and placing it in the drag proxy image position

  - by Jeeva

  I found examples in adobe site only to position the object where the mouse pointer is. But i have to place the image in the position of drag proxy image.

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• Should I use static_cast or reinterpret_cast when casting a void* to whatever

  - by Andy

  Both static_cast and reinterpret_cast seem to work fine for casting void* to another pointer type. Is there a good reason to favor one over the other?

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• Containers of auto pointers

  - by Gianluca

  I know containers of auto pointers should not be used and can cause problem. What is the actual reason for that? Is that any other kind of "smart" pointer which is safe to use in a container?

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• Setting clustered index in nhibernate

  - by SolBadguy

  Hi. I'm trying to define a property that is not the id as a clustered index in nhibernate, yet I've found no way of doing this. Could anyone give me a pointer of how this is done, or it is something not currently available in nhibernate? Thanks in advance

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• Does the openssl command line do key strengthening?

  - by chotchki

  If I run the openssl command line in hmac mode (as below), is the key used for the hmac used directly or is it hashed before using it as the key? echo "foo" | openssl dgst -sha256 -binary -hmac "test" | openssl base64 Similarly, when encrypting a file with openssl (as below)is the pass phrase hashed with the salt? (If so how is it done? A pointer to the right source file would be even better.) openssl enc -salt

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• C question on functions

  - by benjamin button

  some times i see that functions are defined as below: read_dir(dir) char *dir; { DIR * dirp; struct dirent *d; /* open directory */ dirp = opendir(dir); ......... so on here what is the importance of the statement char *dir; what is the intension behind declaring the pointer soon after the function name and then starting the function body.

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• how to use ldap_sasl_bind_s() with SSL, DN, password (no client cert)

  - by Steve

  I have ldap_sasl_bind_s() working fine with SSL and client cert (without DN and password) from 'C' windows program. When I call ldap_sasl_bind_s() using SSL, DN and password (no client cert) it throws null pointer exception. Should this work or should I be using another api call?

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• When you call remove(object o) on an arraylist, how does it compare objects?

  - by Thomas.Winsnes

  When you call remove(object o) on an arraylist in java, how does it compare the objects to find the correct one to remove? does it use the pointer? or does it compare the objects using the interface Comparable?

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• how to create media player on iphone?

  - by Jim

  I want to create my own media player. There is so much restriction with default media player control on iphone. I have written lots of applications using default media player. Now i want to write my own media player.If any one can give pointer from where to start to create custom media player. Thanks in advance. Jim.

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• Ocamlrun.lib Not Found For Linking

  - by Onorio Catenacci

  Hi all, Trying to build the OCaml Win32 API binaries for OCaml 3.11.0 on Win 7 and I consistently get a message when I try nmake dynamic: 'cannot open input file "ocamlrun.lib"'. My google skills seem to be failing me--is there something I need to do to get this .lib file? It doesn't seem to be part of the libraries which are included in the OCaml binary distribution for Windows. Can anyone give me a pointer in the right direction?

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• div refresh without click of the button

  - by fusion

  how do i make the div refresh, say after 10 secs and execute the run_query() function without clicking on the button? <script src="scripts/ajax.js" type="text/javascript"></script> <div id="quote"><strong>Quote of the Day</strong></div> <div><a style="cursor:pointer" onclick="run_query()">Next quote …</a></div>

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• How to add the ToPoint and FromPoint of a line on one layer to another layer / feature class

  - by Jacques Bosch

  I have a roads layer. I need to ad a point to another, point layer where ever roads intersect. How can I add such points to the existing points layer. In hand I have the line layer, the line feature / To and From Points, and the points layer. I just need a pointer as to how to create points in the points layer. I am using C# Thank you.

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• Getting following warning while compiling

  - by thetna

  warning: passing argument 1 of 'bsearch' makes pointer from integer without a cast and the corresponding code is Parent =bsearch((const size_t)ParentNum, ClauseVector, Size, sizeof(CLAUSE),pcheck_CompareNumberAndClause); the compilar is gcc. here CLAUSE is defined as *CLAUSE.

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• How to skip the first line when fscanning a .txt file ?

  - by ZaZu

  Hello there, I am using C and my knowledge is very basic. I want to scan a file and get the contents after the first or second line only ... I tried : fscanf(pointer,"\n",&(*struct).test[i][j]); But this syntax simply starts from the first line =\ How is this possible ? Thanks.

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• oprofile unable to produce call graph

  - by aaa

  hello I am trying to use oprofile to generate call graph. Compiler is g++, platform is linux x86-64, linker is gfortran C++ code is compiled with -fno- omit-frame-pointer. oprofile is started with --callgraph=25. report I run with --callgraph. the call graph is produced but it's only includes self time, which is not much use what am I missing?

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• Lisp: Determine if a list contains a predicate

  - by justkt

  As part of a homework assignment in Lisp, I am to use apply or funcall on any predicates I find. My question (uncovered in the coursework) is: how do I know when I've found a predicate in my list of arguments? I've done some basic google searching and come up with nothing so far. We're allowed to use Lisp references for the assignment - even a pointer to a good online resource (and perhaps a specific page within one) would be great!

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