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Re^3: What's the weaken here for?

by Anonymous Monk
on Jan 20, 2012 at 03:38 UTC ( #948877=note: print w/replies, xml ) Need Help??

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  1. or download this
    {
       my $foo = {}; # ref count 1
    ...
    # it refers to it self, its self-referential,  a circular reference
    # for memory held by $foo to be released after $foo goes out of scope
    # $foo->{foo} has to be weakened, the reference count decreased
    
  2. or download this
    sub once {
      my ($self, $name, $cb) = @_;
    ...
    
      return $wrapper;
    } 
    

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