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  1. or download this
    use Devel::Peek;

...
  CUR = 12
  LEN = 14
  COW_REFCNT = 1
  2. or download this
    my $dd = "hello world\n";
printf("the dd string address is %x \n", cc($dd));
...
# just print the dd string address is 8d8b8e90, the upper 4bytes of th
+e address was truncated.