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array of hash - perl

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# 1  
Old 04-26-2012
array of hash - perl
How do I get the unique hashes from an array of hashes?

Code:
@ar1 = ( {a=>1,b=>2}, {c=>3,d=>4},{a=>1,b=>2});

I need :
Code:
@ar2 = ( {a=>1,b=>2}, {c=>3,d=>4});

Thanks.
# 2  
Old 04-26-2012
Code:
perl -MData::Dumper -le'
  @ar1 = ( 
    {
      a => 1,
      b => 2
      }, 
    {
      c => 3,
      d => 4
      },
    { 
      a => 1,
      b => 2 
      }
      );

  for (@ar1) {
    push @ar2, $_ unless 
      $c{ join "\0", sort %$_ }++  
    }
  
  print Dumper \@ar2;
    '

This User Gave Thanks to radoulov For This Post:
shellwell
# 3  
Old 04-27-2012
Thanks. It worked.
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