smalltalk singleton pattern: how do I initialize the instance variables?

Question

I\'m having trouble in getting the singleton pattern to initialize a instance variable in smalltalk. (here is a link to another implementation for clarification)

thi

Answer 1

Try simpler:

YourClass class>>singleton

       UniqueInstance ifNil: [UniqueInstance := self basicNew initialize].
       ^UniqueInstance

then on instance side of your class implement an appropriate #initialize method, for example:

YourClass>>initialize

          someInstvar := someInitalValue.
         ^self

Update:: Name of the class method accessing the singleton varies, it can be #default, #current, or #singleton. I mostly use later.