General guidelines on how to design classes with best known industry practices.

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Gathering IP address and workstation information; does it belong in a state class?

I'm writing an enterprisey utility that collects exception information and writes to the Windows Event Log, sends an email, etc. This utility class will be used by all applications in the corporation: ...
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System Communication: Avoiding Including a Large “HAS-A” Hierarchy Which Isn't Used

The situation: System A Huge, complicated system. Uses an important Message object with many other Message objects attached, many of which have further Message objects attached. In total, this is ...
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PHP class data implementation

I'm studying OOP PHP and have watched two tutorials that implement user login\registration system as an example. But implementation varies. Which way will be more correct one to work with data such as ...
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Provide an OnChange event for an internal property which is controlled externally?

For fun and by request I am updating this ImageGrid component, a kind of listbox for images that has a FileNames property of type TStrings. For ease of writing, I have been misusing its ...
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JavaScript Class Module: How to avoid an antipattern

I've seen a number of different methodologies when it comes to applying class-based inheritance to JS/ECMA-based projects. Over the past several months, I've been applying IIFE Namespaces to my class ...
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Why use link classes in oql instead of classes that contain links

itop abstracts its very complex database design with an object query language (oql). For this there are classes definded, like 'Ticket' and 'Server'. Now a Ticket usually is linked to a Server. In my ...