First, I'll paraphrase you:

my $key_ordering = [8, 1, 5, 3, 9];
my $data = [
    {key => 1, name => 'label4'},
    {key => 3, name => 'label2'},
    {key => 5, name => 'label5'},
    {key => 8, name => 'label1'},
    {key => 9, name => 'label3'}
];

[download]
Secondly, note that to work every 'key' of each tuple in @$data must be present in @$key_ordering.

  my %lookup = 
    map { $_->{key} => $_->{name} }
      @$data;
  my @ordered = 
    map { {key => $_, name => $lookup{$_}} } 
      @$key_ordering;

[download]

Which just suggests to me that $data was the wrong type of data-structure to begin with. If you really need it like that, you might consider maintaining (in parallel) a lookup table mapping 'key' to indexes into @$data.

-David

In reply to Re: Sort AoH by another array by erroneousBollock
in thread Sort AoH by another array by saberworks

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