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  1. or download this
    #! /usr/bin/perl

...
};
map { print "$_->[0] -> $_->[1]\n" }
  $f->( $f, %{ { x => 5, y => 8, z => 42 } } );
  2. or download this
    z -> 42
x -> 5
y -> 8
  3. or download this
    #! /usr/bin/perl

...
  },
  %{ { x => 5, y => 8, z => 42 } }
  );