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• jcaptcha integration with struts

  - by xain

  Hi, I'm trying to interate a struts 1.3.8 app with jcaptcha-1.0; I added the jcaptcha jar to the app lib and added <%@ taglib uri="jcaptcha" prefix="jcaptcha"%> to my form The app couldn't find the file, so I added the following to the web.xml file <taglib-uri>jcaptcha</taglib-uri> <taglib-location>/WEB-INF/lib/jcaptcha-1.0-all.jar</taglib-location> </taglib> And now I get the null pointer exception: org.apache.jasper.JasperException: Unable to read TLD "META-INF/taglib.tld" from JAR file Any clues ? Thanks

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• how to close a popup screen in blackberry bold

  - by SWATI

  hey i have displayed a pop-up screen when i click on a menu item now i want to close that pop-up screen when user presses escape key.but it does not work and remain stuck,till i click on a button on the pop=up screen. how can i achieve that???? filter is my pop-up screen my code is ::: protected boolean keyChar(char c, int status, int time) { boolean retVal = false; if (c == Characters.ESCAPE) { close(); UiApplication.getUiApplication().invokeLater(new Runnable() { public void run() { //UiApplication.getUiApplication().popScreen(filter); UiApplication.getUiApplication(). popScreen(UiApplication.getUiApplication().getActiveScreen());//(filter); } }); retVal = super.keyChar(c,status,time); } return retVal; }

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• Storing a SHA512 Password Hash in Database

  - by Chris

  In my ASP.NET web app I'm hashing my user passwords with SHA512. Despite much SO'ing and Googling I'm unclear how I should be storing them in the database (SQL2005) - the code below shows the basics of how I'm creating the hash as a string and I'm currently inserting it into the database into a Char(88) column as that seems to be the length created consistently Is holding it as a String the best way to do it, if so will it always be 88 chars on a SHA512 (as I have seen some bizarre stuff on Google)? Dim byteInput As Byte() = Encoding.UTF8.GetBytes(sSalt & sInput) Dim hash As HashAlgorithm = New SHA512Managed() Dim sInsertToDatabase As String = Convert.ToBase64String(hash.ComputeHash(byteInput))

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• [IOS SDK] Sending Data to Other Players - Game Center

  - by mohacs

  Hi guys, I am developing a simple game center multiplayer game. i did manage almost everything except sending messeage to players. what i mean, i can invite player to play game, game is starts etc. regarding apple documentation i am using following method to send data but it' doesn't work at all. const char *bytes = "123"; NSData *packet = [NSData dataWithBytes:&bytes length:3]; [myMatch sendDataToAllPlayers: packet withDataMode: GKMatchSendDataUnreliable error:nil]; if possible a working sample would be great. many thanks.

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• Initialize data using memset

  - by gkid123

  memset to initilize data member- What is the benefit of initializing this way? Does it work in this example? Does it work in general ? Is it a good idea in general? class A { public: A(); private: int a; float f; char str[35]; long *lp; }; A::A() { memset(this, 0, sizeof(*this)); }

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• strchr in objective C?

  - by Brian Postow

  I'm trying to write the equivalent of strchr, but with NSStrings... I've currently got this: Boolean nsstrchr(NSString* s, char c) { NSString *tmps = [NSString stringWithFormat: @"%c", c]; NSCharacterSet *cSet = [NSCharacterSet characterSetWithCharactersInString: tmps]; NSRange rg = [s rangeOfCharacterFromSet: cSet]; return rg.location != NSNotFound; } This seems needlessly complex... Is there a way to do this (preferably, one that doesn't involve turning the NSString into a cstring which doubles the run time, or writing it myself using characterAtIndex:... Am I missing some obvious method in the NSString description?

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• Static Member Variables of the Same Class in C++

  - by helixed

  I'm trying to create a class which contains a static pointer to an instance of itself. Here's an example: A.h: #include <iostream> #ifndef _A_H #define _A_H class A { static A * a; }; A * a = NULL; #endif However, when I include A.h in another file, such as: #include "A.h" class B { }; I get the following error: ld: duplicate symbol _a in /Users/helixed/Desktop/Example/build/Example.build/Debug/Example.build/Objects-normal/x86_64/B.o and /Users/helixed/Desktop/Example/build/Example.build/Debug/Examplebuild/Objects-normal/x86_64/A.o I'm using the Xcode default compiler on Mac OS X Snow Leopard. Thanks, helixed

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• Convert French to ASCII (French speakers are wanted)

  - by Andrey

  i need to convert French text to most correct analog in ASCII. Let me explain. In German you should convert ä to ae, this is not simple removing of diacritics, it is finding most correct analogue. Please help me with French. I found that there is no programmatic way to do it, i create Dictionary<char, string>. To convert (+ capitals): é, à, è, ù, â, ê, î, ô, û, ë, ï, ü, ÿ, ç. and any other you suggest! Please write suggested substitution in ascii. Thanks, Andrey.

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• Setting glutBitmapCharacter color?

  - by colordot

  Just wondering if someone can help me track down my issue with the following code where the text color is not being set correctly (its just rendering whatever color is in the background) void RenderText(int x, int y, const char *string) { int i, len; glUseProgram(0); glLoadIdentity(); glColor3f(1.0f, 1.0f, 1.0f); glTranslatef(0.0f, 0.0f, -5.0f); glRasterPos2i(x, y); glDisable(GL_TEXTURE_2D); for (i = 0, len = strlen(string); i < len; i++) { glutBitmapCharacter(GLUT_BITMAP_8_BY_13, (int)string[i]); } glEnable(GL_TEXTURE_2D); } I've checked all the usual things (I think), disabling texturing, setting color before rasterPos'ing, etc Ive disabled shaders but Im still having issues

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• defining < operator for map of list iterators

  - by Adrian

  I'd like to use iterators from an STL list as keys in a map. For example: using namespace std; list<int> l; map<list<int>::const_iterator, int> t; int main(int argv, char * argc) { l.push_back(1); t[l.begin()] = 5; } However, list iterators do not have a comparison operator defined (in contrast to random access iterators), so compiling the above code results in an error: /usr/include/c++/4.2.1/bits/stl_function.h:227: error: no match for ‘operator<’ in ‘__x < __y’ If the list is changed to a vector, a map of vector const_iterators compiles fine. What is the appropriate way to define the operator < for list::const_iterator?

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• f# naming conventions.. WTF??!!

  - by Peter Goras

  let w t f = have I missed something? do all value names in F# have to be a single char? preferably x? and do all method names have to abbreviated to a cryptic four chars?? we've had it rammed down our throats for years about descriptive variable/method names in other languages but now this doesnt apply to F#? or it is some coding 'style' bollox? Learning from code examples is hard enough with type inference. why make it harder?

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• How to properly rewrite ASSERT code to pass /analyze in msvc?

  - by Sorin Sbarnea

  Visual Studio added code analysis (/analyze) for C/C++ in order to help identify bad code. This is quite a nice feature but when you deal with and old project you may be overwhelmed by the number of warnings. Most of the problems are generating because the old code is doing some ASSERT at the beginning of the method or function. I think this is the ASSERT definition used in the code (from afx.h) #define ASSERT(f) DEBUG_ONLY((void) ((f) || !::AfxAssertFailedLine(THIS_FILE, __LINE__) || (AfxDebugBreak(), 0))) Example code: ASSERT(pBytes != NULL); *pBytes = 0; // <- warning C6011: Dereferencing NULL pointer 'pBytes' I'm looking for an easy and safe solution to solve these warnings that does not imply disabling these warnings. Did I mention that there are lots of occurrences in current codebase?

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• What can be done to speed up synchronous WCF calls?

  - by Dimitri C.

  My performance measurements of synchronous WCF calls from within a Silverlight application showed I can make 7 calls/s on a localhost connection, which is very slow. Can this be speeded up, or is this normal? This is my test code: const UInt32 nrCalls = 100; ICalculator calculator = new CalculatorClient(); // took over from the MSDN calculator example for (double i = 0; i < nrCalls; ++i) { var call = calculator.BeginSubtract(i + 1, 1, null, null); call.AsyncWaitHandle.WaitOne(); double result = calculator.EndSubtract(call); } Remarks: CPU load is almost 0%. Apparently, the WCF module is waiting for something. I tested this both on Firefox 3.6 and Internet Explorer 7. I'm using Silverlight v3.0

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• MPMediaItem - NSCoding problem with MPMediaItemArtwork

  - by z s

  Hi, So MPMediaItem conforms to NSCoding, but it contains a pointer to MPMediaItemArtwork, which doesn't conform to NSCoding. So if I try to archive a MPMediaItem, if that item has some artwork in it, it will not be able to unarchive. I tried to make a category of MPMediaItemArtwork and make it conform to NSCoding, but I can't seem to do that because we don't have access to the actual UIImage that it stores. Does anyone know of any other creative ways to get around this problem? I want to be able to archive an MPMediaItem, even if it means somehow stripping off the artwork object. Is there a way to make a category of a class to strip away certain functionality (instead of just adding more, like we do with categories)? Or any other clever way to achieve this? Thanks.

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• Create a mirrored linked list in Java

  - by glacier89

  Linked-List: Mirror Consider the following private class for a node of a singly-linked list of integers: private class Node{ public int value; public Node next; } A wrapper-class, called, ListImpl, contains a pointer, called start to the first node of a linked list of Node. Write an instance-method for ListImpl with the signature: public void mirror(); That makes a reversed copy of the linked-list pointed to by start and appends that copy to the end of the list. So, for example the list: start 1 2 3 after a call to mirror, becomes: start 1 2 3 3 2 1 Note: in your answer you do not need to dene the rest of the class for ListImpl just the mirror method.

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• Need tips for better usability for tabular data with pagination

  - by Anil Namde

  Hi all, Just another day i found myself writing code to show data on the UI. I am again using DataGrid/GridView (ASP.NET), User Id as link button (clickable) to redirect user to another page. User having hard time to find where to click(Though the link has underline and hand pointer as usual on hover) just another common table like structure Following are the columns for example, User ID (Link button), User Name, First Name, Last Name, Date Of Birth Now i would like to make it better form the usability point of view. Can someone suggest a good link, example or suggestions to make it better. Thanks all,

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• Efficiently check string for one of several hundred possible suffixes

  - by Ghostrider

  I need to write a C/C++ function that would quickly check if string ends with one of ~1000 predefined suffixes. Specifically the string is a hostname and I need to check if it belongs to one of several hundred predefined second-level domains. This function will be called a lot so it needs to be written as efficiently as possible. Bitwise hacks etc anything goes as long as it turns out fast. Set of suffixes is predetermined at compile-time and doesn't change. I am thinking of either implementing a variation of Rabin-Karp or write a tool that would generate a function with nested ifs and switches that would be custom tailored to specific set of suffixes. Since the application in question is 64-bit to speed up comparisons I could store suffixes of up to 8 bytes in length as const sorted array and do binary search within it. Are there any other reasonable options?

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• What is a good way to animate UIViews inside UITableViewCell after a callback?

  - by erotsppa

  We couldn't find a way to animate UIViews inside a UITableCell as an action from a callback. Suppose in a scenario where you click on a button on the UITableViewCell and it fires off an asynchronous action to download a picture. Suppose further that when the picture is downloaded we want a UIView in the cell to animate the picture to give user a visual feedback that something new is about to be presented. We couldn't find a way to track down the UIVIew to invoke beginAnimation on because the original cell that the user clicked on might now be used for another row due to the nature of cells being reused when you scroll up and down in the table. In other words we can't keep a pointer to that UITableViewCell. We need to find another way to target the cell and animate it if that row is visible and don't animate if the row is scrolled out of range.

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• Some question of object property name in Actionscript3.

  - by unsouled

  A.as package { public class A { public static var someObject:Object = { (B.SOME_CONST): { value: 10 } }; } } B.as package { public class B { public static const SOME_CONST:String = "someStringConst"; } } And this is test code. var obj:Object = A.someObject; trace(obj.hasOwnProperty(B.SOME_CONST)); trace(obj.hasOwnProperty("someStringConst")); trace(obj.hasOwnProperty("SOME_CONST")); I expected that result will be true, true, false but real result is false, false, true. Why?

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• Unable to encode to iso-8859-1 encoding for some chars using Perl Encode module

  - by ppant

  I have a HTML string in ISO-8859-1 encoding. I need to pass this string to HTML:Entities::decode_entities() for converting some of the HTML ASCII codes to respective chars. To so i am using a module HTML::Parser::Entities 3.65 but after decode_entities() operation my whole string changes to utf-8 string. This behavior seems fine as the documentation of the HTML::Parse. As i need this string back in ISO-8859-1 format for further processing so i have used Encode::encode("iso-8859-1",$str) to change the string back to ISO-8859-1 encoding. My results are fine excepts for some chars, a question mark is coming instead. One example is single quote ' ASCII code (’) Can anybody help me if there any limitation of Encode module? Any other pointer will also be helpful to solve the problem. Thanks

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• How do I compile boost using __cdecl calling convention?

  - by Sorin Sbarnea

  I have a project compiled using __cdecl calling convention (msvc2010) and I compiled boost using the same compiler using the default settings. The project linked with boost but I at runtime I got an assert message like this: File: ...\boost\boost\program_options\detail\parsers.hpp Line: 79 Run-Time Check Failure #0 - The value of ESP was not properly saved across a function call. This is usually a result of calling a function declared with one calling convention with a function pointer declared with a different calling convention. There are the following questions: what calling convention does boost build with by default on Windows (msvc2010) how to I compile boost with __cdecl calling convention why boost wasn't able to prevent linking with code with different calling conventions? I understood that boost has really smart library auto-inclusion code.

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• Memory allocation included in API

  - by gurugio

  If there is the 'struct foo' and an APIs which handle foo, which is more flexible and convenient API? 1) API only initialize foo. User should declare foo or allocate memory for foo. The this style is like pthread_mutex_init/pthread_mutex_destroy. example 1) struct foo a; init_foo(&a);' example 2) struct foo *a; a = malloc(sizeof(struct foo)); init_foo(a); 2) API allocates memory and user get the pointer. This is like getaddrinfo/freeaddrinfo. example) struct foo *a; get_foo(&a); put_foo(a);

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• struct assignment operator on arrays

  - by Django fan

  Suppose I defined a structure like this: struct person { char name [10]; int age; }; and declared two person variables: person Bob; person John; where Bob.name = "Bob", Bob.age = 30 and John.name = "John",John.age = 25. and I called Bob = John; struct person would do a Memberwise assignment and assign Johns's member values to Bob's. But arrays can't assign to arrays, so how does the assignment of the "name" array work?

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• Clone a node using Javascript DOM

  - by Abhimanyu

  I want to create a clone for below code using javascript DOM var summaryDiv = __createElement("div","sDiv","sDiv"+j); summaryDiv.onmouseover = function() {this.setAttribute("style","text-decoration:underline;cursor:pointer;");} summaryDiv.onmouseout = function() {this.setAttribute("style","text-decoration:none;");} if(browser.isIE) { summaryDiv.onclick = new Function("__fc.show_tooltip("+j+",'view_month')"); } else { summaryDiv.setAttribute("onclick", "__fc.show_tooltip("+j+",'view_month',event)"); } someobj.appendChild(summaryDiv); I m using obj = summaryDiv.cloneNode(true) which is creating node. but onclick event is not getting fire in case of Internet Explorer.can any body help me over it?

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• How can I get this code involving unique_ptr and emplace_back to compile?

  - by Neil G

  #include <vector> #include <memory> using namespace std; class A { public: A(): i(new int) {} A(A const& a) = delete; A(A &&a): i(move(a.i)) {} unique_ptr<int> i; }; class AGroup { public: void AddA(A &&a) { a_.emplace_back(move(a)); } vector<A> a_; }; int main() { AGroup ag; ag.AddA(A()); return 0; } does not compile... (says that unique_ptr's copy constructor is deleted) I tried replacing move with forward. Not sure if I did it right, but it didn't work for me.

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