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Countered dingbat univote. Sort of a cross between Lawrence of Arabia and Dilbert.[^] -Or- A Dead ringer for Kate Winslett[^]

Have you heard about Leslie Nielsen? He could run a bicycle , too.[^] :) "I love deadlines. I like the whooshing sound they make as they fly by." (DNA)

In C++ the compiler only needed a function's prototype or a class declaration, both usually found in headers. The compiler left it to the linker to locate the implementations and resolve those dependencies. When working with C++, this is a common error. The compiler compiles all sources without problems, but the linker stops with an error because you forgot to tell it where to locate a library which belongs to one of the headers you have included. So you may very well see the linker as a second pass after compiling. And from the clouds a mighty voice spoke: "Smile and be happy, for it could come worse!" And I smiled and was happy And it came worse.

leckey76 wrote: Hey Nish, sorry for the belated response, but this is the user ID i've had for ages. I recently realized I have to update my current company and such, but I think I've always been leckey76 (unless I was just leckey at some point...insert Inception sequence with a matrix with my narcolepsy...) So, did you abandon the old one? Old user profile[^] Most recent post with that was on Jan 28th 2011. Regards, Nish My technology blog: voidnish.wordpress.com You've gotta read this : Using lambdas - C++ vs. C# vs. C++/CX vs. C++/CLI

I'm all for a quad core tablet. Too bad it's *completely* wasted on a dinky OS that's intended for listening to some tunes, writing emails, browsing the internet and watching the occasional video. Please can I have a real OS with creative apps that actually allow me to create cool content! I understand that the number of users who actually want to create content vs the number that just want to passively sit back and veg is pretty large, but I do wish that they would add some features for the creative crowd. ¡El diablo está en mis pantalones! ¡Mire, mire! SELECT * FROM User WHERE Clue > 0 0 rows returned Save an Orange - Use the VCF! Personal 3D projects Just Say No to Web 2 Point Blow

goodpeapul wrote: My question is how many interfaces can be implemented on a single class? In my humble opinion asking "how many" is not quite the right focus on the broad issue of why and how to use Interfaces. Clearly Interfaces can have multiple uses: 1. to enforce an implementation contract on implementers of an Interface. That "contract" forcing you at compile-time to deal with failure to 'meet the terms of the contract.' 2. to encapsulate "shared behavior" used consistently across implementers of the Interface. 3. via casting instances of Interface implementers to the Interface: to expose a limited subset of functionality, or content, of the instance to other Objects. 4. via discriminate use of implicit and explicit Interfaces to obtain the advantages of all of the above while avoiding semantic confusion, or overlap. imho the idea of "single responsibility" is as applicable to a set of behaviors (methods, functions), as it is to classes. Interfaces are one tool to help achieve that. It may be of interest to you to read Erich Gamma's comments on interfaces here in this 2005 interview:[^]: scroll down to the section titled "Program to an interface, not an implementation." From a humble student of Interfaces and their strategic uses. best, Bill "I have always wished for my computer to be as easy to use as my telephone; my wish has come true because I can no longer figure out how to use my telephone." Bjarne Stroustrop circa 1990

Ahmed, Sorry about the delay replying. The first point can be decided in the derived class - the appropriate place to do so. Eiffel has solved this problem - before C++ even attempted it, you can simply rename one of the inherited A's, and it becomes obvious. Further, in a true message-based architecture, the question is redundant. All calls and data access are polymorphic, so D can simply define a method A to disambiguate - either by delegating to the original (in prototypical multiple inheritance) or explictly (otherwise). This gives true representation independence - you program to the interface of an object, not its implementation. Yes, it can be simulated by aggregation and interfaces, but that fails in the Comparable example I cited. In that example, defining one method in a class allows mixing in a lot of methods to provide a whole interface (<, <=, >=, >). This can save a lot of repetitive coding, fulfilling the basic principle of Don't Repeat Yourself (DRY). Self implements MI and has a radical inlining architecture. Often, a polymorphic message results in the actual code being inlined at the call site - with code injected to fall back to indirection when the type of the receiver is not amongst the most common cases. For many dispatches, this results in code that is nearly as optimal as hand-crafted C, and allows Self to adopt an approach where everything (including integers etc.) is an object in the real sense - the compiler (a JIT-based compiler) does all the work of making things efficient. It does very well - a fully dynamic compiler with execution times comparable to Java or C#, and frequently better. The lead developers of this were hired by Sun to work on the Java Hotspot compiler for this reason. I recommend looking at the Self documentation at least - looking at the class library there gives a good vision of how Multiple Inheritance is useful for solving real world problems, while avoiding the repetitive coding patterns that interfaces and aggregation based approximations lead to.