py-AddOn classes are like dynamic mixins, but with their own private attribute and method namespaces. A concern implemented using add-ons can be added at runtime to any object that either has a writable __dict__ attribute, or is weak-referenceable. AddOn classes are also like adapters, but rather than creating a new instance each time you ask for one, an existing instance is returned if possible. In this way, add-ons can keep track of ongoing state. For example, a Persistence add-on might keep track of whether its subject has been saved to disk.
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230 B
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5 lines
230 B
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$NetBSD: distinfo,v 1.1.1.1 2010/07/14 13:10:27 jihbed Exp $
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SHA1 (AddOns-0.7.zip) = a8d81565c31129320f53f7d356b79c945876f928
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RMD160 (AddOns-0.7.zip) = 381a3d196e357b91891a1b0b211f895dadb0169c
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Size (AddOns-0.7.zip) = 34220 bytes
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