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Frequently Asked Questions

What's the difference between how virtual and non-virtual member functions are called?

Inheritance -- virtual functions Updated! , C++ FAQ Lite
Non-virtual member functions are resolved statically. That is, the member function is selected statically (at compile-time) based on the type of the pointer (or reference) to the object. In contrast, virtual member functions are resolved dynamically (at run-time). That is, the member function is selected dynamically (at run-time) based on the type of the object, not the type of the pointer/reference to that object. This is called "dynamic binding.
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What is the difference between virtual and non-virtual?

budgetweb.com - Frequently Asked Questions (FAQ)
If you want your web space URL to be http://www.yourcompany.com then you will either need your own web server, or to rent a virtual server. The latter is really just space on someone else's web server which has been configured to respond to requests for your domain. This service is generally slightly more expensive than non-virtual web space, where you simply have a subdirectory on someone else's web server, and your URL incorporates their domain name, such as http://www.someprovider.
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Why are paths sometimes manipulated by member functions and sometimes by non-member functions?

Boost Filesystem FAQ
The design rule is that purely lexical operations are supplied as class path member functions, while operations performed by the operating system are provided as free functions.
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What is the difference in a Virtual and Non-Virtual Domain?

About AlterCom
Location, location, location!!! A URL (Universal Resource Locator) is an address in cyberspace that allows you to access a site; it can be your very own or shared. Equate a Virtual Domain name site to your very own office building, and a Non-Virtual Domain to that of an office that you share with other tenants - such as in a strip mall. It gives your site the appearance of having its own server, and thus a more professional, larger presence on the Internet.
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What is the difference between a member and a non-member?

Charlotte Regional Realtor® Association : Benefits of Me...
Only a member is considered a Realtor?. A licensed individual who joins the Charlotte Regional Realtor? Association (CRRA) is also a member of the North Carolina Association of Realtors? (NCAR) and the National Association of Realtors? (NAR). This means that this individual has paid their initiation fee, attended the mandatory orientation program, and agreed to abide by the Realtor? Code of Ethics.
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How do I write assembler functions which can be called from C?

HI-TECH Software Frequently Asked Questions
How do I write assembler functions which can be called from C? A: The easiest way to learn how to do anything in assembler, is to write a simple version of it in C, then use the compiler to compile it to assembly. You can then use this output as a template to your routine. For example: Say you wanted to write an assembler routine which takes a "long" type as a parameter. Firstly, write the function in C: void MyAsmFunc(unsigned long parameter) { } Now compile it to assembly.
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What are virtual functions?

OOPS FAQ - Page 13
Latest Answer: Also increases memory consumption since a virtual function address table has to be maintained in RAM...
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C++ corner
Virtual functions cannot be explained before explaining polymorphism. When you publicly derive from a base class, you are allowed to use a base pointer to store a dynamically allocated derived object. For instance: public: void derivedF() { std::cout << "Derived::derivedF()" << std::endl; } }; If we can't even use the derived members, why bother using a pointer to the base class anyway ? Without virtual functions, this would make no sense at all, indeed.
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What is the difference between a GutterNet™ Member and non-member?

GutterNet.com - Find The Right Gutter Installation Professio...
GutterNet™ Members have elected to list their company with GutterNet™ so you can better understand their products, services, and specialty over non-member listings. You also have a better way to communicate your gutter project requirements to them and put your project to bid. GutterNet™ estimate requests will only be directed to GutterNet™ members.
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Why is it called Virtual?

Virtual Catalog FAQ
Computer systems that find and integrate information from other places, but have no real location themselves --they only really exist on the Web-- are often called virtual. The WWW Virtual Library may be the best known example. Some of the big "meta" search engines on the Internet, such as, Metacrawler, Dogpile, and Mamma, are also virtual.
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What is the difference between Virtual Hosting and Non-Virtual Hosting?

Dr. Cheap - Frequently Asked Questions
The main difference, and most noticeable, is the address of the site. To best show this, we will use an example of someone who picks the name of his company, Bob's Hardware. If Bob uses Non-Virtual Hosting, his web page address would be http://www.drcheap.com/bobshardware and his email address would be bobshardware@drcheap.com On the other hand, if Bob decides that he wants Virtual Hosting, then he would choose bobshardware.com as his domain name, his site address would be http://www.
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Why are the operations.hpp non-member functions so low-level?

Boost Filesystem FAQ
extended attempt to add convenience functions on top of, or as a replacement for, the low-level functionality failed because there is no widely acceptable set of simple semantics for most convenience functions considered. Attempts to provide alternate semantics, via either run-time options or compile-time polices, became overly complicated in relation to the value delivered, or became contentious.
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Why should I get an Individual (Non-Member) subscription?

Stroke -- FAQ Individual (Non-Member) Subscriptions
Individual (Non-Member) Subscribers have access to: Tables of contents, abstracts, full-text searching, full-text display, document delivery, PDFs, links to Medline and GenBank, and the advantage of having password access to Stroke Online from any computer connected to the Internet.
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Can a member go to a non-participating dentist?

FAQs about Dental Discounts
Yes, members can go out-of-network, but they will pay the dentist's usual charges, which is higher than if they see a DVN provider.
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Is Virtual Colonoscopy a non-invasive test?

Virtual Colonoscopy FAQ
A. This test requires the insertion of a small tube into the rectum and inflating the colon with air or carbon dioxide. This is much like having an enema. There are no needles or injections required and therefore it is noninvasive. BACK TO TOP
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Who is eligible for an Individual (Non-Member) and a Member Subscription?

Stroke -- FAQ Individual (Non-Member) Subscriptions
Individual (Non-Member) subscriptions are available to all individuals, and include a print subscription with FREE online access to Stroke Online. Online-only subscriptions are also available at an individual (non-member) rate. Current members of an AHA Scientific Council are eligible for Member subscriptions, both print and online, at the member rate. To join an AHA Council, contact our Customer Service Department or order online.
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What do you mean by pure virtual functions?

OOPS FAQ - Page 16
Latest Answer: A pure virtual function is a function declaration with the keyword 'virtual' prefixed to it and defi...
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Can you have virtual functions in Java?

AKAAS :: JAVA Interview Questions and Answers | JAVA Frequen...
Yes, all functions in Java are virtual by default. This is actually a pseudo trick question because the word "virtual" is not part of the naming convention in Java (as it is in C++, C-sharp and VB.NET), so this would be a foreign concept for someone who has only coded in Java. Virtual functions or virtual methods are functions or methods that will be redefined in derived classes.
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What's the difference between the "i" version and the "non-i"?

Technical Support
Original TTM 52 and TTM 54 models were built with metal toggle switches (ST 1) and a painted steel Decor plate (the one the faders stick through). When we revamped the design, we spread the controls apart slightly and added a Lexan covered Decor plate, as well as changed to larger plastic "bat handle" toggle switches (ST 2). Neither the Decor plate nor switches can be swapped between versions. Functionally and electronically the two versions are identical.
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What's the difference between exclusive and non-exclusive?

Frequently Asked Questions - Associated Content
Exclusive: Original content you created that you guarantee has not been previously published online or in print and will not be published elsewhere in the future. Upfront payment offers are typically higher for exclusive submissions. Once you accept an offer for an exclusive submission, you assign full copyright ownership to Associated Content.
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What is the difference between virtual colonoscopy and optical colonoscopy?

Virtual Colonoscopy Center at Brooke Army Medical Center
Virtual colonoscopy is an abdominal CT scan where "pictures" of the abdomen are taken and then the images are reconstructed into a 3D replica of the colon. The images are then read by a trained radiologist to look for pre-cancerous polyps or abnormalities inside and outside your colon.
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Are there any Masonic functions that I can attend as a non-Mason?

USENET FAQ
Yes. Many Lodges open their installation of officers to the public. Once a year, a new Worshipful Master takes office. The ceremony performed during his inauguration is public. It is not the same ceremony as would be performed in a regular Masonic ritual or degree, but it does have the flavoring of Masonic symbolism and allows the public to "get a feel for Masonry" without being Masons. NOTE: Not all jurisdictions have public installations. Call or write your local lodge for details.
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How do I call non-Lisp functions from Lisp?

Kantrowitz & Margolin comp.lang.lisp FAQ
Most Lisp implementations for systems where Lisp is not the most common language provide a "foreign function" interface. As of now there has been no significant standardization effort in this area. They tend to be similar, but there are enough differences that it would be inappropriate to try to describe them all here.
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What's the difference between a free and full member?

The Date Outdoors - You'll love our fresh approach! - FAQs
Free membership enables you to upload your profile, and search our full database to find likeminded people and events. You'll also be able to add people to your favourites and see who has added you too! Full membership will enable you to view all emails received, contact other members and receive discounts on events. Full members will also be able to take advantage of offers from our friends from time to time.
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Why do the pop member functions return void?

SGI STL: Frequently Asked Questions
All of the STL's pop member functions (pop_back in vector, list, and deque; pop_front in list, slist, and deque; pop in stack, queue, and priority_queue) return void, rather than returning the element that was removed. This is for the sake of efficiency. If the pop member functions were to return the element that was removed then they would have to return it by value rather than by reference. (The element is being removed, so there wouldn't be anything for a reference to point to.
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Why should I log-out from Member Functions?

FAQ
When you finish your job in Member Functions, you should log-out immediately to protect your own interest. Otherwise, others can continue to use your account to perform transactions such as house manifest submission without your authorization.
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What are Hactl's member services functions?

FAQs - Hactl Member Services
Hactl's member services functions are the newly enhanced version of the hactl.com, which has already been put into the Internet for Hactl customers since 1995. Hactl's member services functions will provide more features to enhance operational efficiency and security. Please click here for further details.
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How Virtual functions call up is maintained?

Ans: Through Look up tables added by the compile to every class image. This also leads to performance penalty.
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What is the difference between COMMAND and CMD DOS Virtual Machine in Windows XP?

Windows XP FAQ Frequently Asked Questions - Bootstrike.Com
Posted in Bootstrike Forums by wmccain] Windows XP includes TWO command-line processors, CMD.EXE and COMMAND.COM. The second one, COMMAND.COM, is a stripped-down version of the command processor from DOS. The Windows XP version of COMMAND.COM is severely restricted in its capabilities (lacks long filename support and many other features familiar from Windows 98SE), so it is all-but-unusable. Furthermore, it turns out that there are TWO ways to run CMD.
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I hear there is a non-invasive "virtual" colonoscopy available. Why shouldn't I just wait for that?

The Colon Cancer Prevention Network
Virtual colonoscopy is slowly becoming available, but it is still in the very early stages, so availability is very limited. In fact, AmSurg (The Colon Cancer Prevention Network's management partner) is very involved in testing this technology in some of its centers, in partnership with the renowned Cleveland Clinic and General Electric Corp.
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