Differences between revisions 1 and 17 (spanning 16 versions)

Pattern Programming

-  ⇤ ← Revision 1 as of 2003-11-17 22:06:36 → 
  Size: 627
  Editor: yermat
  Comment:
+   ← Revision 17 as of 2004-04-03 10:19:56 → ⇥
  Size: 354
  Editor: proxy-a0
  Comment:
-Deletions are marked like this.
+Additions are marked like this.
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-= Singleton =
+= Pattern Programming =
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-=== classmethod ===
----
''' pro '''
+See also :
 * [http://dales.rmplc.co.uk/Duncan/accu/pythonpatterns.html/ Patterns in Python by Duncan Booth]
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-You can use both as simple class or as a singleton...
+ * Wiki:DesignPatternsBook
 * Thinki:PythonPatterns
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-----
''' cons '''
+=== GoF ===
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+ * SingletonProgramming
 * ProxyProgramming
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+Line 16:
-{{{
#!python
# Code is Public Domain.
class Singleton:
    _singleton = None
    
    def getSingleton(cls):
        if not Singleton._singleton:
            Singleton._singleton = cls()
        return Singleton._singleton

    getSingleton = classmethod(getSingleton)


class Test(Singleton):
    def test(self):
        print self.__class__,id(self)


t1 = Test.getSingleton()
t2 = Test.getSingleton()

t1.test()
t2.test()
}}}
+=== Other ===
 
 * DelegationEventModel
 * StateProgramming

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