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copied!<p><strong>Stay away from singleton if possible</strong></p> <p>Singleton has its uses, however I believe it's overused in a lot of cases.</p> <p>The biggest problem with a singleton is that you're using Global State, which is generally regarded as a bad thing as when complexity in your software grows it can cause you to have unintended side effects.</p> <p><strong>Object composition might be a better way</strong></p> <p>For games you might want to take a look at using Object Composition rather than traditional OOD Modelling.</p> <blockquote> <p>A software component is a software element that conforms to a component model and can be independently deployed and composed without modification according to a composition standard.</p> <p>A component model defines specific interaction and composition standards. A component model implementation is the dedicated set of executable software elements required to support the execution of components that conform to the model.</p> <p>A software component infrastructure is a set of interacting software components designed to ensure that a software system or subsystem constructed using those components and interfaces will satisfy clearly defined performance specifications.</p> </blockquote> <ul> <li><p><a href="https://stackoverflow.com/questions/1901251/component-based-game-engine-design">Component based game engine design</a></p></li> <li><p><a href="http://www.as3dp.com/2009/02/21/design-pattern-principles-for-actionscript-30-favor-object-composition-over-class-inheritance/" rel="nofollow noreferrer">http://www.as3dp.com/2009/02/21/design-pattern-principles-for-actionscript-30-favor-object-composition-over-class-inheritance/</a></p></li> </ul> <p>Reading over the material in the first link should give you some excellent ideas on how to model your inventory system and have it extendable in a nice way.</p>

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