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Specifically, examine the singleton's usage pattern, and make sure it's not just a convenient excuse for a mud-ball of globals.

http://sites.google.com/site/steveyegge2/singleton-considere...

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On a followup interview to the GoF, they were in favor of dropping Singleton:

http://www.informit.com/articles/printerfriendly.aspx?p=1404...

"When discussing which patterns to drop, we found that we still love them all. (Not really- I'm in favor of dropping Singleton. Its use is almost always a design smell.)"

Yep. The only justifiable use I've run across is internal bookkeeping in a class library across an API that doesn't provide space for context and you need lazy initialization.

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