Always use an enum instead of defines and always close the list with an additional count. This makes life simpler and helps the compiler.Instead of defines: #define TypeA 0#define TypeB

All you need is a simple class that asks your object for each known interface. Here’s the class QI: #include #include #include class QI : public std::stringstream, protected CRegKey{protected: virtual

Suppose you need to make multiple inserts (or updates or deletes) to a SQL Server database?for instance, inserting items in a shopping cart. In the past, you needed to loop

Instead of writing a string class that contains a (char *), why not write a string class with a fixed char array? Of course, it would be repetitive if you

Consider this code: class CA{//…};class CB{//…};CA * CB2CA(CB *pb){ return dynamic_cast(pb);} The CA and CB are totally unrelated classes and the CB2CA function seems to be completely useless. However, what

A sparse array saves memory by not allocating memory for elements that are not initialized or to which you don’t need access. They’re quite easy using the STL map.This example

Use the following code: #include void main(){ char name[15]; double salary; ofstream outFile(“FileName.txt”, ios::in); while (outFile){ outFile >> name >> salary; }}

How to print out a Currency in Java is an often overlooked topic. How should Currency be printed out in an international, standardized way?The java.text.NumberFormat class is used for outputting

This wrapper class “FileCopier” copies data from one file to another. This class uses another class: “StreamCopier”. /** * Class: FileCopier * Author: Vivek Bagade * Date: 8/31/2001 * Description:

While it may seem logical to store a result in a variable just to use it as an argument to some function, sometimes it may be better to pass the

This is useful in a Web-based Photo Gallery kind of application, where you need to automatically generate multiple sizes of the same image. class ThumbnailGenerator { public void generateThumbnail (String

If you have a method into which you pass a String parameter that you compare with another string then: void foo( String str ){ String CONST_STR = “bar”; // DON’T

To create a file that your IE browser will recognize as XML, simply place these two lines at the top of your ASP page. IE will view it as an

A field gains focus when the user clicks inside the text box, and the focus is lost when the user clicks outside the box, anywhere on the page. You can

At one time or another, all ASP progrmmers have used RESPONSE.WRITE to write out a variable on the screen, ensuring that the variable is passing correctly or has the correct

This tip is useful for large, server-side scripts containing lots of functions/procedures that generate HTML forms. Say you’ve hardcoded the script name (for the same script) in the ACTION tag

Servlet 2.3 provides an API that finds the algorithm used a Web app’s SSL requests. The attribute “javax.servlet.request.cipher_suite” is provided to get the information.Here’s the code: String cipherAttribute = “javax.servlet.request.cipher_suite”;String

/** * Function that will remove the leading and trailing spaces. */function trim(str){ return( rtrim(ltrim(str)));}/** * Function that will remove the trailing spaces. */function rtrim(str){ re = /(s+)$/; return str.replace(re,

The DataReader is the ADO.NET counterpart of the forward-only, read-only recordset in classic ADO. For this reason you never know how many rows the DataReader is about to return. In

‘ create and return a DataAdapter over an open SqlConnection’ and initialize its delete, insert, and update commands” CN is the SqlConnection object’ SQL is the SQL Select statement to

‘ create and return a DataAdapter over an open OleDbConnection’ and initialize its delete, insert, and update commands” CN is the OleDbConnection object’ SQL is the SQL Select statement to

‘ return a DataReader over a SqlConnection” CONNSTRING is the connection string’ SQL is the SQL Select statement to be executed” the connection will be automatically closed when the DataReader

‘ update a data source through a DataAdapter’ ‘ DA is the OleDbDataAdapter or SqlDataAdapter object’ DT is the DataTable to be updated’ if USETRANSACTIONS is True, all rows are

‘ return a DataReader over a generic Connection” CN is the OleDbConnect or SqlConnection object’ SQL is the SQL Select statement to be executed” if closed, the connection will be

‘ return a DataReader over an OleDbConnection” CONNSTRING is the connection string’ SQL is the SQL Select statement to be executed” the connection will be automatically closed when the DataReader

If you’re building a project with multiple similar forms, it’s nice to be able to cut-and-paste controls from one form to another. However, in VB6, you can’t do this for

‘ get the text enclosed between two Delimiters” it advances Index after the close delimiter’ Returns “” and Index = -1 if not found’ search is case sensitive’ ‘ For