Differences between revisions 2 and 12 (spanning 10 versions)

Pattern Programming

-  ⇤ ← Revision 2 as of 2003-11-17 22:09:57 → 
  Size: 755
  Editor: yermat
  Comment:
+   ← Revision 12 as of 2003-11-22 18:26:12 → ⇥
  Size: 309
  Editor: yermat
  Comment:
-Deletions are marked like this.
+Additions are marked like this.
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-= Singleton =
+= Pattern Programming =
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-Voyez aussi http://c2.com/cgi/wiki?PythonSingleton
+See also http://dales.rmplc.co.uk/Duncan/accu/pythonpatterns.html/
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-=== classmethod ===
----
''' pro '''
+and http://www.thinkware.se/cgi-bin/thinki.cgi/PythonPatterns
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-You can use both as simple class or as a singleton.
You do not need to write code for each class you want to act as singleton.
+=== GoF ===
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+Line 11:
-----
''' cons '''
+ * SingletonProgramming
 * ProxyProgramming
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-{{{
#!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 ===
 
 * ["DEM"] Delegation Event Model

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