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Oxygene by Example – Singleton
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– This is the first item in my series “Oxygene by Example”, this time about singletons. Singleton classes are used when there’s only ever one instance of a class needed. They differ from Static Classes in that they have an actual instance, can implement an interface and you can use them as parameters to a method. There are different ways of writing singletons, but the easiest way is by using a readonly class variable: type IObjectCache = interface method GetOrCreate(aName: string; aNeedNewValue: Func): T; end; GlobalObjectCache = class(IObjectCache) ...
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jamiei
