The Latest

DevX - Software Development Resource

Exporting data

Question: I wasn’t able to find out what all the command line switches for dbexport do. The only ones I found were -o and -c.Is there a way to export

DevX - Software Development Resource

What happens to dangling pointers in java?

Question: What happens to dangling pointers in Java? Supposedly there is garbage collection, but when is it performed? From what Ihave read, it seems really easy to have persistent danglingpointers

DevX - Software Development Resource

Initializing a deck of cards using a for-loop

Question: I have two enumerated types: enum suit_type{club,diamond,heart,spade} and enum rank_type{ace,two,…,queen,king}. In structure CARD, I have the variables suit_type suit and rank_type rank. In class PILE, I have a private

DevX - Software Development Resource

Virtual function tables

Question: I would like to know what virtual function tables are. When one refers to vtables, is it a virtual function table that is implied? Answer: In short, vtables are

DevX - Software Development Resource

Destructor-explicit invocation

Question: If the destructor is called from a new’ed object (a->A::~A()), is the object’s instance deleted? Answer: No. A destructor is a special member function of a class that is

DevX - Software Development Resource

Virtual function is abstract

Question: We are getting an error message that says a function fromwithin a class C cannot allocate instanceof type C because one of the virtual functions(the one we wrote) is

DevX - Software Development Resource

Memory re-allocation

Question: Is there a standard method/operator in C++ analogous to standard C’s realloc() function that enables resizing of dynamic memory allocated by new operator? Answer: There is no standard call

DevX - Software Development Resource

C++ Program Performance Monitor

Question: Do you know of a good tool for getting performance data on a pure C++ program?I need a tool that indicates sections of code thatuse the most CPU/memory, etc.

DevX - Software Development Resource

Inherited operator = not being seen

Question: I have a templated class A that defines two operator =, and a templated class B : public class A which should inherit the two virtual a::operator = I

DevX - Software Development Resource

Constructor with static members in library

Question: Background: Digital UNIX 3.2g, Alpha platform, latest GNU.From the FAQ, I know that you are supposed to declare static member variables externally from the declaration and inonly one place.

DevX - Software Development Resource

How to move from beginner to intermediate C/C++

Question: I am a C/C++ programmer who is moving from the beginner to intermediate level. My question is, how does one move successfully from the beginner to intermediate level? Answer:

DevX - Software Development Resource

C++ Classes

Question: I have written a program with two classes. Each uses the other within it and contains pointers to the other. However, this means that the first class encountered by

DevX - Software Development Resource

Array of structures

Question: I have a typedef structure that holds info for employees, and an array of these structures. I need to access a part of the structure for one employee. How

DevX - Software Development Resource

Class constructor

Question: I’ve read that there are two ways to define a class constructor. For example:class List…1. List():num(0) { }2. List() { num=0; }Why is the first one more efficient at

DevX - Software Development Resource

A problem with a class Screen

Question: I found on the Web a simple class Screen as follows: /*———————————————— * s c r e e n . h * * A class to manage an ANSI

DevX - Software Development Resource

IMG tag and relative/evaluated location

Question: We have a structure already defined that is now being modified, containing more than 400 pages that include IMG tags. The entire “mess” is being moved to another server/structure

DevX - Software Development Resource

Call waiting

Question: My connection to my server is disrupted when I get a call on call waiting. No one seems to know how to dis-enable my call waiting. Service is provided

DevX - Software Development Resource

Data transfer monitor

Question: I have Internet Explorer 2.1. While downloading, it popped up a box to show my rate of transfer (bps). I have since installed a new hard drive. Once I

DevX - Software Development Resource

&lt,BODY BACKGROUND…>

Question: Is there a way to stop a background from tiling? Answer: Yes and no. You cannot stop a background graphic from tilling but you canmake it “seem” like it

DevX - Software Development Resource

Browser size determination and tables

Question: Is it possible to determine the size (width and height) of the current user’s browser window? If so, is it then possible to use that pixel dimension and paste

DevX - Software Development Resource

Naming the home page

Question: How can I link my home page to my domain name? My domain name will be “shhspgh.org”. How can I name or link my home page document so that

DevX - Software Development Resource

Accessing Music CD Information

Question: I am writing a Music CD program. I know that each Music CD has a unique number that identifies it. How can I access the number on the CD?

DevX - Software Development Resource

Data Control vs. DAO

Question: When, in general, is it best to use DAOs as opposed to data controls? We are building VB clients for Access and MS SQL Server. Answer: If you plan

DevX - Software Development Resource

How to get VB to change hex code

Question: I need to change one offset value in a binary file. How can I read the file with Visual Basic? Answer: I would recommend loading the file into an