On May 19, 2013, at 5:19 AM, mrfroasty <mrfroa...@gmail.com> wrote: > On 05/16/2013 11:28 PM, Tedd Sperling wrote: >> So, if you find a good reference, please let me know. > > In my point of view, Interfaces and Abstracts are completely different stuffs > not related at all.Interface is a kind of a way of defining how all objects > should behave or written by developers (one has used a word contract or > agreement). > > For instance we are writting this huge application where hundreds of > developers are going to work together.We make an agreement all objects in > this application should provide a function for someone debug to see all the > contents or data in that object and call this method $this->debug(); > > In order to guarantee that developers will have to obey this agreement, the > only way is to throw some bunch of exception when they do not.This can be > defined in an interface.Where everyone implimenting this interface (creating > objects) must have a function called debug().
I understand all of that -- but that's not the question I am asking. Certainly, I can create an interface and if anyone wants to implement the interface, then they are forced to flesh-out the methods it contains. I understand that -- it's a contract. But the other side of the argument is why would anyone want to do that other than to meet a design criteria? It is very easy to understand double inheritance -- it is simply where a child can inherit methods from both parents. But in languages that do not support double inheritance, an Interface is offered as a solution -- and therein is my question. So, in that regard how does an Interface provide methods to classes that implement the Interface? Just show me a *simple* example (either php or Java will do). Cheers, tedd PS: There have been people who have provided Interface examples, but none have demonstrated quasi-double inheritance. _____________________ tedd.sperl...@gmail.com http://sperling.com -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
