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  1. or download this
    #!/usr/bin/perl
    use warnings;
    ...
    store $hashref, $HASHFILE;
    
    # END OF PROGRAM
    
  2. or download this
    me@ubuntu01$ rm file
    me@ubuntu01$
    ...
    Hash has key2!  (Value is: 'data2')
    me@ubuntu01$
    me@ubuntu01$
    
  3. or download this
    Use of uninitialized value in printf at ./SerHash2.perl line 33.
    Hash has key2!  (Value is: '')