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# { student name => grade }
my %grades = ( "Bob" => 3.2, "Alice" => 3.9 );
...
#    }
#
# or you could give a symbolic name to the { id => value } things.

  my %map = ( a => 1, b => 3, c => 2 );

...
  my %map2 = ( a => { name => "Bob", children_ids => { Alice => 132, M
+abel => 81 } });
  # Set $etty to "Mabel"
  match('{ ? => { children_ids => { $etty => 81 } } }', \%map2);