Unlike the solution using state the my in an enclosing block allows you to include controlled access to the cache. 

{
 my $_cache;
 sub withLongComputation {
  $_cache //= ...;
  ...
 }
 sub clearCache {
  undef $_cache;
 }
}

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Jenda
Enoch was right!
Enjoy the last years of Rome.

In reply to Re^5: 'state' variables and unit testing (intentional) by Jenda
in thread 'state' variables and unit testing by vsespb

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