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Oct 23rd, 2017
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  1. $hr = {
  2. a=> {
  3. b=>{
  4. c=>3
  5. }
  6. }
  7. };
  8. $hr-> {map} = {
  9. c => \$hr->{a}->{b}->{c}
  10. };
  11. $hr->{a}->{b}->{c} = 20;
  12. ${$hr->{map}->{c}}
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