Currently, we have information about our products in a variety of places. ERP, Various Databases, etc. Generally we're using SQL Server to store most of the database. We want to create a centralized place where we can store all the information related to our products and start replacing these disjoint databases (with the exception of t...
interface I1 { ... } interface I2 { ... } struct List(T) { ... } How do I specialize my List to operate only on classes that implement both I1 and I2? One interface is easy: struct List(T : I1) Other languages. In C# it's: struct List<T> where T : I1, I2 And in Java I'd say: class List<T extends I1 & I2> One catch: I don't wan...
I'm trying to get in the habit of designing the interfaces to my websites at the very beginning before I do any actual coding. I've read "Getting Real" by 37 signals and they recommend doing the interface first, before any actual code is produced. What exactly is meant by that? Does that mean use pure HTML and CSS to design the site and...
Hi all, I'm creating an interface for "PickupPoints", Each pickup point needs to be able to return all pickup points found and the pickup point details and maybe in the future more information. That's okay with the code below: <?php interface iPickupPoint { public function getPickupPoints($countryCode, $postalCode, $city); pub...
Hello everyone! I would like to use the same code for copying files to an FTP server, and through USB. I've already written some code, which as of now uses functions from the System.IO namespace. To minimize code duplication, I've listed the functions which I need from the system.IO namespace, and I was thinking of designing an interfa...
Hi, In Java, Is there a way to prevent extending an interface. Since final cannot be added to an interface , i was curious to know whether there was a way if any, to prevent extending an Interface. ...
Possible Duplicate: When to use an interface instead of an abstract class and vice versa? Hi, I am teaching OOP concepts to non-programmers. I wanted to know how can you explain the difference between an interface and an abstract class. What I am actually looking for, is a real world example that can help highlight the differe...
Possible Duplicates: Abstract classes vs Interfaces Interface vs Base class Hi, In C# when should we use interfaces and when should we use abstract classes? Please explain with example ...
The more I see ref used in production code, the more misuse I encounter and the more pain it causes me. I have come to hate this keyword, because from a framework-building standpoint, it seems silly. When would it be a good idea to communicate to users of your code the notion of maybe changing an object reference/value out from beneath t...
I see this syntax a lot and don't understand the reasoning behind it. I thought you generally want to work with classes rather than interfaces to make it easier to carry out the full panoply of operations you might want to perform. Why do this: List<Foo> foo = new ArrayList<Foo>(something.getFoo()); instead of this: ArrayList<Foo> f...
Hi, I have recently been implementing a templating system for my home-grown web-site generator platform. What I'm currently trying to implement is the use of an interface throughout the template class heirarchy like so (this is just an example): interface IStyleSheet { public function StyleSheetFragment(); } abstract class Templa...
Ive been working with some guys on a highly customized UI for a Cocoa app as well as a few for iPhones. Am I the only one who is starting to see interface builder as a cludge? Its good for standard components and simple apps.. but the moment you get more deep and complex and customized it becomes painful fast. Is it better to for in...
Before I start using CORBA I want to know something. It would seem intuitive to me that you could use an IDL type as an attribute of another, which would then expose that attribute's methods to the client application (using ".") as well. But is this possible? For example (excuse my bad IDL): interface Car{ attribute BrakePeda...
OOP interfaces. ...
What are the ways to pull info from an Access DB to powershell? ...
Hi, I'm trying to write a code that allows a user to load an assembly (DLL file), choose an interface in said assembly, than generates a class inheriting that interface, with stubs for all required methods. The class would be generated either into a file or into an active VS session (the code is intended for use inside an IWizard initi...
Just a clarification from an earlier question about OO PHP. I've checked on the php.net website but still not completely sure. Should be a quick answer, I expect. When 'defining' methods in an interface, must the class that implements it use all the listed methods from the interface? Example: interface foo { public function blah()...
First off let me say I am maintaining someone else's poorly designed code so I am limited in how much I can change it. Now what is happening is that they have created a series of methods that are invoked by reflection. One of those methods takes a Map as one of its arguments. At runtime this Map is implemented with a Hashtable. Here'...
I have the folowing interface; public static interface Attributes { public final static String InterestDeterminationDate = "InterestDeterminationDate"; public final static String CreditType = "CreditType"; public final static String NumberInternal = "NumberInternal"; public final static String InterestRat...
This is a rather elementary C# question; my apologies, but I haven't been able to find this elsewhere. What is the best way to convert from Object<class> to Object<interface>? I.e. //fake interface interface ignu {} //fake class which implements fake interface class bee : ignu {} //function which accepts a generic with the interface...