Question: How are Virtual Functions implemented in C++ ? What is a virtual table? Answer: Let me start by saying that the C++ language definition does not impose any implementation

Question: I am wondering how Visual C++ implements class templates. The code below is a simple stack class template that can take all the simple data types (char, int, float,

Question: I have an account with a Web space provider which includes a virtual FTP area.I’m trying to write a perl program that, when run, will copy all files from

Question: An old high school friend said he put a picture of himself on the Web, and to view it I should go to JPEG … WHAT DO I DO???

Question: Why are textures important to the high-end rendering and 3D development market? Answer: At the moment there is a “gold rush for textures” in this market. Companies such as

Question: I need to know how to detect the screen resolution of the client machine. Then I need to tell it to go to specific pages based on what it

Question: Is it possible to really touch something in VRML, not just have a texture map that looks like a touchable surface? Answer: This depends on whether you have the

Question: I’m working on a Web site in Microsoft Front Page, and when I browse the home page in either Netscape of Internet Explorer, all the hyperlinks on the page

Question: Someone told me I have to specify a MIME encoding somewhere on my server. Would you be kind enough to tell me where on a Windows NT server Internet

Question: Is there software out there that allows one to create interactive VRML worlds without knowing how to program? Answer: Yes: Fountain Pro from Caligari, Virtual Home Space Builder from

Question: I’m wondering if/how one can link two or more embedded VRML objects in a single Web page so that both objects would respond to the same key/mouse input. I’m

Question: How can I achieve photographic 3D environments on the Web? Answer: QTVR is a type of movie file format that enables users to navigate photo-quality scenes. There is a

Question: I’m beginning the design of an application where it would be advantageous to be able to programmatically move the position of a control on its form. Is it possible

Question: [Joe Celko’s Production Report Puzzle]We get a production report from work centers which has a date, center code and how many widgets were produced from each batch of raw

Question: [Joe Celko’s Outer (JOIN) Limits Puzzle]Gerard Manko at ARI had a problem in 1994 April. They had just switched over from Paradox to Watcom SQL. The conversion of the

Question: (Joe Celko’s Least Little Thing Puzzle)Gregg Reno asked for an answer to a “Simple SQL puzzle” on the SQL Roundtable section of the DBMS CompuServe forum in March.He wanted

Question: I see the term “AFX” everywhere in the MFC source code.For example, “AFX_MSG_MAP”. What does it mean? Answer: I once asked this of Jeff Harbers, one of the original

Question: What is the best Netscape plug-in for viewing VRML files? Answer: I assume that because Netscape has chosen Live3d, formerly the WebFX browser from Paper Software, to be the

Question: What are the disadvantages of ODBC versus SQL? Answer: ODBC is a generic implementation, whereas native SQL is always optimized for the database server being used. Thus, if you

Question: Can I determine which employees have received a salary for a month that is more than twice the average salary in that month? I need to show:month_number, average salary,

Question: Is it possible to set indexes between tables in SQL expression? Answer: You can establish indexes on SQL tables, but SQL indexes do not create an implied relationship between

Question: What are the key features of the Moving Worlds proposal? Answer: Moving Worlds is VRML 2.0 proposal from a consortium of companies, formed by SGI, who are interested in

Question: I have a table with three columns: the firstcontains the name of the currency, thesecond contains the currency rate and the third contains the actual date when thecurrency rate

Question: Which rendering engines are used in VRML browsers and how do they affect my choice of browser? Answer: The library of functions that is used to create all the

Question: Is there a VRML browser most users prefer? If so, why? Answer: Well, if you’re Microsoft, then you may think that World View browser from Intervista Software is the

Question: What are the key features of IBM’s VRML 2.0 proposal? Answer: Researchers at IBM Japan have proposed a reactive virtual environment. No Web references to the proposal were available

Question: How can I ignore case when trying to SELECT allrecords that are LIKE a certain string variable? I have an employee’s name field in which the charactersare a combination

Question: I am trying to select data from three columns of a table listing all tables of a database. The table_name column is repeated with each separate column_namecolumn, hence the

Question: What VRML 2.0 sites are there now? Answer: Yes, there are products available that have been developed with the same aspirations as VRML 2.0 (i.e., simulation of the real

Question: What are the key features of Sun’s HoloWeb? Answer: Sun Laboratory’s HoloWeb proposal uses Java as an integrated real-time 3D animation scripting language. HoloWeb is a binary file format,