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Search found 243 results on 10 pages for 'yan cheng cheok'.

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• SQL Server DMVs in Action - Sample Chapter

  Read the first chapter of this new book on DMVs. Free trial of SQL Backup™“SQL Backup was able to cut down my backup time significantly AND achieved a 90% compression at the same time!” Joe Cheng. Download a free trial now.

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• Row Oriented Security Using Triggers

  Handling security in an application can be a bit cumbersome. New author R Glen Cooper brings us a database design technique from the real world that can help you. Free trial of SQL Backup™“SQL Backup was able to cut down my backup time significantly AND achieved a 90% compression at the same time!” Joe Cheng. Download a free trial now.

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• ShowPlan Operator of the Week - Merge Join

  Did you ever wonder how and why your indexes affect the performances of joins? Once you've read Fabiano Amorim's unforgettable explanation, you'll learn to love the MERGE operator, and plan your indexes so as to allow the Query Optimiser to use it. Free trial of SQL Backup™“SQL Backup was able to cut down my backup time significantly AND achieved a 90% compression at the same time!” Joe Cheng. Download a free trial now.

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• Troubleshoot Database Concurrency in SQL Server with sp_locks

  sp_locks is a useful tool which can help a DBA in detecting and troubleshooting blocking and concurrency scenarios. This article demonstrates a worked example of using sp_locks to troubleshoot a database concurrency issue. Free trial of SQL Backup™“SQL Backup was able to cut down my backup time significantly AND achieved a 90% compression at the same time!” Joe Cheng. Download a free trial now.

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• Working with SQL Server Profiler Trace Files

  In a previous tip we looked at the steps to Create a Trace Template in Profiler. In this tip we will look at a few more tips such as creating a trace template from an existing trace file and saving a trace file to a SQL Server table. Free trial of SQL Backup™“SQL Backup was able to cut down my backup time significantly AND achieved a 90% compression at the same time!” Joe Cheng. Download a free trial now.

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• Fun with SQL Server Profiler trace files and PowerShell

  Running Profiler traces against multiple servers becomes a painful process when it’s time to collate and filter all that data. It would be time-consuming, frustrating and messy if Laerte hadn’t written this handy PowerShell script (complete with examples) to help you out. Free trial of SQL Backup™“SQL Backup was able to cut down my backup time significantly AND achieved a 90% compression at the same time!” Joe Cheng. Download a free trial now.

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• Stairway to SQL Server Agent: Step 1: Setup and Overview

  SQL Server Agent is a Microsoft Windows service that allows a DBA to automate administrative tasks. SQL Server Agent can run jobs, monitor SQL Server, and process alerts. The SQL Server Agent service must be running before any jobs scheduled to execute automatically can be run Free trial of SQL Backup™“SQL Backup was able to cut down my backup time significantly AND achieved a 90% compression at the same time!” Joe Cheng. Download a free trial now.

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• DevWeek & SQL Server DevCon 2011

  The 14th annual DevWeek conference takes place from 14-18 March 2011, at the Barbican Centre in central London, and once again incorporates two dedicated tracks on SQL Server, alongside seven concurrent tracks aimed at software developers. Free trial of SQL Backup™“SQL Backup was able to cut down my backup time significantly AND achieved a 90% compression at the same time!” Joe Cheng. Download a free trial now.

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• SEQUENCE in SQL Server 2011

  SEQUENCE is a core new feature of SQL Server 2011 (Denali). It is a more performant, flexible alternative to the INDENTITY attribute. This article introduces sequence and demonstrates how to use it and its performance advantage. Free trial of SQL Backup™“SQL Backup was able to cut down my backup time significantly AND achieved a 90% compression at the same time!” Joe Cheng. Download a free trial now.

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• Avoid Resource Conflict

  - by Yan Cheng CHEOK

  I have a MFC exe, trying to dynamic load a MFC dll. // This is code in MFC exe HINSTANCE h = AfxLoadLibrary(_T("DLL.dll")); typedef void(*FUN)(); FUN fun = (FUN)GetProcAddress(h, "loveme"); FreeLibrary(h); Both MFC exe and MFC dll, are having their own resource file. However, I realize that, if MFC exe and MFC dll are having a same resource ID, conflict may occur. // This is code in MFC dll. Both exe and dll, are having resources with // ID 101. CString s; s.LoadString(101); // Resource 101 in exe is being shown :( AfxMessageBox(s); May I know how I can avoid resource ID conflict problem? Can we have two resource in both MFC and DLL, although their ID is different, but they are independent from each other? This means, DLL will only load DLL's resource. EXE will only load EXE's resource.

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• Help to Install STLPort in VC6

  - by Yan Cheng CHEOK

  I try to follow the following steps to install STLPort in VC6 1) I change C:\Program Files\Microsoft Visual Studio\VC98\Bin\VCVARS32.BAT content set INCLUDE=%MSVCDir%\ATL\INCLUDE;%MSVCDir%\INCLUDE;%MSVCDir%\MFC\INCLUDE;%INCLUDE% set LIB=%MSVCDir%\LIB;%MSVCDir%\MFC\LIB;%LIB% to (The directory C:\STLport-5.2.1\lib is not exsits?) set INCLUDE=C:\STLport-5.2.1\stlport;%MSVCDir%\ATL\INCLUDE;%MSVCDir%\INCLUDE;%MSVCDir%\MFC\INCLUDE;%INCLUDE% set LIB=C:\STLport-5.2.1\lib;%MSVCDir%\LIB;%MSVCDir%\MFC\LIB;%LIB% 2) I C:\>cd C:\STLport-5.2.1\build\lib C:\STLport-5.2.1\build\lib>"c:\Program Files\Microsoft Visual Studio\VC98\bin\VCVARS32.BAT" Setting environment for using Microsoft Visual C++ tools. C:\STLport-5.2.1\build\lib>c:\STLport-5.2.1\configure.bat msvc6 STLport Configuration Tool for Windows The system cannot find the path specified. The system cannot find the path specified. The system cannot find the path specified. The system cannot find the path specified. The system cannot find the path specified. Setting compiler: Microsoft Visual C++ 6.0 The system cannot find the path specified. The system cannot find the path specified. The system cannot find the path specified. The system cannot find the path specified. The system cannot find the path specified. Setting platform: Windows XP The system cannot find the path specified. Done configuring STLport. Go to build/lib folder and type "nmake clean install" to build and install STLport to the "lib" and "bin" folders. Go to build/test/unit folder and type nmake clean install to build unit tests and install them in bin folder. 3) The code within configure.bat, which give me The system cannot find the path specified is REM initially create/overwrite config.mak echo # STLport Configuration Tool for Windows > build\Makefiles\nmake\config.mak echo # >> build\Makefiles\nmake\config.mak echo # config.mak generated with command line: >> build\Makefiles\nmake\config.mak echo # configure %1 %2 %3 %4 %5 %6 %7 %8 %9 >> build\Makefiles\nmake\config.mak echo # >> build\Makefiles\nmake\config.mak What I shall change them to? How can I continue the build? Thanks.

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• Is it fair for us to conclude XOR string encryption is less secure than well known encryption (Say Blowfish)

  - by Yan Cheng CHEOK

  I was wondering, is it fair to conclude, XOR string encryption is less secure than other encryption method, say Blowfish This is because for both methods, their input are Unencrypted string A secret key string XOR(string value,string key) { string retval(value); short unsigned int klen=key.length(); short unsigned int vlen=value.length(); short unsigned int k=0; short unsigned int v=0; for(v;v<vlen;v++) { retval[v]=value[v]^key[k]; k=(++k<klen?k:0); } return retval; } Is there any proof that XOR encryption method is more easy to be "broken" than Blowfish if the same key is being chosen?

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• Java 2D Drawing Framework

  - by Yan Cheng CHEOK

  Currently, I am using JHotDraw https://sourceforge.net/projects/jhotdraw/ as Figures Drawing Framework in my application. JHotDraw is a two-dimensional graphics framework for structured drawing editors that is written in Java. It is based on Erich Gamma's JHotDraw, which is copyright 1996, 1997 by IFA Informatik and Erich Gamma. I was wondering, besides JHotDraw, do you try out any Java 2D Drawing Framework, which is worth a try?

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• Is Updating double operation atomic

  - by Yan Cheng CHEOK

  In Java, updating double and long variable may not be atomic, as double/long are being treated as two separate 32 bits variables. http://java.sun.com/docs/books/jls/second_edition/html/memory.doc.html#28733 In C++, if I am using 32 bit Intel Processor + Microsoft Visual C++ compiler, is updating double (8 byte) operation atomic? I cannot find much specification mention on this behavior. When I say "atomic variable", here is what I mean : Thread A trying to write 1 to variable x. Thread B trying to write 2 to variable x. We shall get value 1 or 2 out from variable x, but not an undefined value.

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• Having template function defination in cpp file - Not work for VC6

  - by Yan Cheng CHEOK

  I have the following source code : // main.cpp #include "a.h" int main() { A::push(100); } // a.cpp #include "a.h" template <class T> void A::push(T t) { } template void A::push(int t); // a.h #ifndef A_H class A { public: template <class T> static void push(T t); }; #endif The code compiled charming and no problem under VC2008. But when come to my beloved VC6, it give me error : main.obj : error LNK2001: unresolved external symbol "public: static void __cdecl A::push(int)" (?push@A@@SAXH@Z) Any workaround? I just want to ensure my function definition is re-inside cpp file.

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• Replace LinkedList element value through LinkedList.Enumerator

  - by Yan Cheng CHEOK

  I realize there are no way for me to replace value through LinkedList.Enumerator. For instead, I try to port the below Java code to C# // Java ListIterator<Double> itr1 = linkedList1.listIterator(); ListIterator<Double> itr2 = linkedList2.listIterator(); while(itr1.hasNext() && itr2.hasNext()){ Double d = itr1.next() + itr2.next(); itr1.set(d); } // C# LinkedList<Double>.Enumerator itr1 = linkedList1.GetEnumerator(); LinkedList<Double>.Enumerator itr2 = linkedList2.GetEnumerator(); while(itr1.MoveNext() && itr2.MoveNext()){ Double d = itr1.Current + itr2.Current; // Opps. Compilation error! itr1.Current = d; } Any other technique I can use?

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• Use auto_ptr in VC6 dll cause crash

  - by Yan Cheng CHEOK

  // dll #include <memory> __declspec(dllexport) std::auto_ptr<int> get(); __declspec(dllexport) std::auto_ptr<int> get() { return std::auto_ptr<int>(new int()); } // exe #include <iostream> #include <memory> __declspec(dllimport) std::auto_ptr<int> get(); int main() { { std::auto_ptr<int> x = get(); } std::cout << "done\n"; getchar(); } The following code run perfectly OK under VC9. However, under VC6, I will experience an immediate crash with the following message. Debug Assertion Failed! Program: C:\Projects\use_dynamic_link\Debug\use_dynamic_link.exe File: dbgheap.c Line: 1044 Expression: _CrtIsValidHeapPointer(pUserData) Is it exporting auto_ptr under VC6 is not allowed? It is a known problem that exporting STL collection classes through DLL. http://stackoverflow.com/questions/2451714/access-violation-when-accessing-an-stl-object-through-a-pointer-or-reference-in-a However, I Google around and do not see anything mention for std::auto_ptr. Any workaround?

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• Multiple Tables or Multiple Schema

  - by Yan Cheng CHEOK

  http://stackoverflow.com/questions/1152405/postgresql-is-better-using-multiple-databases-with-1-schema-each-or-1-database I am new in schema concept for PostgreSQL. For the above mentioned scenario, I was wondering Why don't we use a single database (with default schema named public) Why don't we have a single table, to store multiple users row? Other tables which hold users related information, with foreign key point to the user table. Can anyone provide me a real case scenario, which single database, multiple schema will be extremely useful, and can't solve by conventional single database, single schema.

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• Help to Install Eclipse for A Netbeans Users

  - by Yan Cheng CHEOK

  I had been using Netbeans all the while to develop Swing application. So far, I am a Happy Netbeans User Currently, I had a project (GWT, J2EE and Swing), which I need to use Eclipse (Please do not ask Why) Here is the step I had been taken. Download Eclipse IDE for Java EE Developers (190 MB) from http://www.eclipse.org/downloads/ I thought this should be the correct choice, as I see most features are found in that edition http://www.eclipse.org/downloads/packages/compare-packages After struggling a while to get use to the user interface of Eclipse, I still cannot find a Visual GUI Editor! After doing some Googling, I realize I need to install something called Plugins However, tones of plugins which had similar features has confused me, as I found http://www.cloudgarden.com/jigloo/index.html http://www.eclipse.org/vep/WebContent/main.php http://code.google.com/p/visualswing4eclipse/ This makes me even more confuse? Which plugin I should use to develop a Swing based application? Most of them seems not up-to-dated. Or, is there any complete bundle I can download, where 1 click, will install all the necessary Swing development tools for me? I just miss my Netbeans :( I really appreciate their team, who make the installation work so easy. One click button install, all the necessary tools just come to me

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• Google liked drop down menu

  - by Yan Cheng CHEOK

  Hello, whenever we go to Google Page and click on the "more", a menu will be dropped down. I would like to have the following effect on my web site too. May I know which JavaScript library can help me to achieve the similar effect?

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• Handling Google clientLogin Captcha Example

  - by Yan Cheng CHEOK

  I have a desktop application. I try to perform authentication using http://code.google.com/apis/accounts/docs/AuthForInstalledApps.html However, whenever I get a Captcha challenge, I use a HTTP GET request (I test using web browser) to get the image to present to user. https://www.google.com/accounts/Captcha?ctoken=Y-DrsDJRiWNOP3gR7fq0PAq4Yxvi3UXewu7P7jgAKjk0eZKQ358nbh27-JZ3-nlzXvfKOD3JvZNXwmlRunyz8jPKzqmkOLw2LYb3ZWjg-tE%3A0gMUFttsSH7QwganSJd1aw However, I always get the images : Sorry, we are unable to handle your request at this time. Please try again later. Any idea what I had did wrong? Thanks!

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• Best Pratice to Implement Secure Remember Me

  - by Yan Cheng CHEOK

  Sometimes, I came across certain web development framework which doesn't provide authentication feature as in Authenication ASP.NET I was wondering what is the security measure needs to be considered, when implementing "Remember Me" login feature, by hand coding? Here are the things I usually did. 1) Store the user name in cookie. The user name are not encrypted. 2) Store a secret key in cookie. The secret key is generated using one way function based on user name. The server will verify secret key against user name, to ensure this user name is not being changed. 3) Use HttpOnly in cookie. http://www.codinghorror.com/blog/2008/08/protecting-your-cookies-httponly.html Any things else I could miss out, which could possible lead a security hole.

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• Case Insensitive Ternary Search Tree

  - by Yan Cheng CHEOK

  I had been using Ternary Search Tree for a while, as the data structure to implement a auto complete drop down combo box. Which means, when user type "fo", the drop down combo box will display foo food football The problem is, my current used of Ternary Search Tree is case sensitive. My implementation is as follow. It had been used by real world for around 1++ yeas. Hence, I consider it as quite reliable. My Ternary Search Tree code However, I am looking for a case insensitive Ternary Search Tree, which means, when I type "fo", the drop down combo box will show me foO Food fooTBall Here are some key interface for TST, where I hope the new case insentive TST may have similar interface too. /** * Stores value in the TernarySearchTree. The value may be retrieved using key. * @param key A string that indexes the object to be stored. * @param value The object to be stored in the tree. */ public void put(String key, E value) { getOrCreateNode(key).data = value; } /** * Retrieve the object indexed by key. * @param key A String index. * @return Object The object retrieved from the TernarySearchTree. */ public E get(String key) { TSTNode<E> node = getNode(key); if(node==null) return null; return node.data; } An example of usage is as follow. TSTSearchEngine is using TernarySearchTree as the core backbone. Example usage of Ternary Search Tree // There is stock named microsoft and MICROChip inside stocks ArrayList. TSTSearchEngine<Stock> engine = TSTSearchEngine<Stock>(stocks); // I wish it would return microsoft and MICROCHIP. Currently, it just return microsoft. List<Stock> results = engine.searchAll("micro");

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• Make Map Key Sorted According To Insert Sequence

  - by Yan Cheng CHEOK

  Without help from additional container (like vector), is it possible that I can make map's key sorted same sequence as insertion sequence? #include <map> #include <iostream> using namespace std; int main() { map<const char*, int> m; m["c"] = 2; m["b"] = 2; m["a"] = 2; m["d"] = 2; for (map<const char*, int>::iterator begin = m.begin(); begin != m.end(); begin++) { // How can I get the loop sequence same as my insert sequence. // c, b, a, d std::cout << begin->first << std::endl; } getchar(); }

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• Prevent Cross-site request forgery - Never Rely on The SessionID Sent to Your Server in The Cookie H

  - by Yan Cheng CHEOK

  I am reading the tutorial at http://code.google.com/p/google-web-toolkit-incubator/wiki/LoginSecurityFAQ It states Remember - you must never rely on the sessionID sent to your server in the cookie header ; look only at the sessionID that your GWT app sends explicitly in the payload of messages to your server. Is it use to prevent http://en.wikipedia.org/wiki/Cross-site_request_forgery#Example_and_characteristics With this mythology, is it sufficient enough to prevent to above attack?

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