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: How do I save my new database at run time to a new file? I’m using a paradox database?DBGrid, and a table and data source control. Answer: Use TTable’s
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
Question: Can you recommend resources to learn how to tackle 16-bit and 32-bit programming in Delphi? Answer: A number of good books that I’ve read include: All of Charlie Calvert’s
Question: I have set up a paradox table for multiple user access using the Netdir method, but when I post a record other users cannot see the changes until the
When you type inside the element in Netscape Navigator 4.5, the text scrolls horizontally. You need to press Enter to create a new line. Internet Explorer 4 doesn’t require a
Active Server Pages that utilize databases like SQL Server are no different than conventional programs in that they will experience a performance boost when you use stored procedures instead of