Tutorial problem with cache

[Cédrick Béler]

Hi

I was having a look at the last exercices of the tutorial and I'm having 
a problem with the last exercice with custom descriptions.

the custom description are doubled each time I access to them in the 
container...

decription is overriden in MAPersonModel

MAPersonModel>>description

    ^super description copy;
          addAll: self class customDescription;
          yourself.

copy sould prevent to change the description stored in the cache. Is it 
correct ?

This makes me ask you another question. When a description (class side) 
is changed, how the cache of the builder is refreshed ? I have no idea


Thank you

Cédrick