Trying to learn, I don't found a Singleton class in Squeak ( maybe exist whit another name ? )
So following http://www.eli.sdsu.edu/courses/spring01/cs635/notes/singleton/singleton.htm l We could have:
Object subclass: #Singleton instanceVariableNames: '' classVariableNames: 'UniqueInstance ' poolDictionaries: '' category: 'Kernel-Classes'
current UniqueInstance ifNil: [UniqueInstance := Singleton basicNew]. ^UniqueInstance
new self error: 'Use current to get an instance of Class ' , self name
Wish to know:
1) If exist this with another name 2) In case not, why not 3) How could hurt me (us) if we have this
Thanks in advance.
Edgar
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