You can initialize std::string with a pointer to char. However, it does not check the pointer. When the pointer happens to be NULL the results are undefined: #includeusing std::string;const char

Unlike ordinary functions, overloaded operators cannot declare a parameter with a default value (overloaded operator() is the only exception): class Date{ private: int day, month, year; public: Date & operator

You can easily create simple database projects in design mode by assigning a set of database properties to the Data control. Once you assign a database and record source, you

If you have header or footer material which appears on every page in your site, such as navigation or copyright information, it makes sense to store it centrally and use

By default, Internet Information Server (IIS) does not log very much information about who has been visiting your site. It does, however, have options to track a plethora of information,

The default behavior of the JComboBox is sufficient enough in most cases. If you select an item from the pull down list, an action event is generated and sent to

The Standard Template Library defines a specialized form of the queue container called priority_queue. A priority_queue is a queue whose elements are internally sorted according to their priority. Thus, an

The capacity of a vector can be resized by calling either reserve() or resize(). These member functions differ in two respects. Unlike resize(), which allocates memory and initializes it with

Take a few minutes to customize your Internet Information Server (IIS) site by specifying a page (other than the default) to handle erroneous page requests. The standard response page looks

The EventObject class is the base class for transferring events in Java (see Tip “Understanding the Listener Pattern”). It provides these methods: public EventObject (Object source) // Constructor. The “source”

A bit of randomness can help keep your Web site from getting stale. You can use the JavaScript rand() function to display random text or a random image. function goRand()

There are two types of const data storage: true const and contractual const. const int cn = 5; // true const A contractual const variable is a non-const one, which

Chances are you’ll need the routines that you write in Visual InterDev 6 in other pages. Once you debug a subroutine, you can add it to the Visual InterDev 6

If you use JavaScript rollover images on your Web pages, it’s a good idea to preload them in order to reduce lag time while the image downloads. Non-preloaded images won’t

The major browsers speed up the loading of Web pages by storing a local copy of visited pages in what is called the cache. This works well for surfing the

To improve performance in your Active Server Pages, try to minimize the amount of server script present. From a design point of view, putting extensive code and business rules in

Often times you may have include files on your Web site that store textual information whose content varies, but that are shown in a layout that remains constant (for example,

It is implementation-dependent whether the destructors of local objects are invoked when an uncaught exception occurs. To ensure that destructors of local objects are invoked in this case, you can

An anonymous union declared in a named namespace or in the global namespace has to be explicitly declared static: static union { int num; char *pc; }; //anonymous union in

The Listener pattern is commonly used in the AWT since JDK 1.1. In fact, the Listener has been the base for the event handling mechanism for UI events in Java.

Servlets provide a more effective mechanism of achieving the functionality offered by CGI (Common Gateway Interface) scripts. CGI was one of the first techniques for creating dynamic Web pages by

If you are utilizing Internet Information Server (IIS) 4 and Microsoft Index Server, be careful which directories you set up to be traversed by Index Server. You likely do not

All Java programmers probably know what Java applets are and how they differ from Java applications. After all applets were Java’s gateway into the Internet. Servlets are Java’s entry into

There are many ways to call a JavaScript function in an HTML document. One way is inside an anchor tag. Any function that is listed in the portion of the

Don’t like that plain search results page that comes up when using index server, when the rest of your site looks so nice? The results page is a file with

As far as design is concerned, dynamic_cast should be preferred to typeid because the former enables more flexibility and extensibility. Notwithstanding that, the runtime overhead of typeid can be less

You can start a thread in Java by either implementing the java.lang.Runnable interface or by extending the java.lang.Thread class (see Tip “Weaving Threads”). How do you decide which mechanism to

Question: Imagine an MDI application where the MDIFrame has many MDIChild forms?each one derived from TBlueForm class. The TBlueForm class has a public method named ChangeColor which only makes the

Question: What is the best way to do a database report?in other words print a database? I have been having serious trouble with QuickRep. I specify the dataset but still