If you want values in @to_be_ordered that are not in %order to be put at the end of the list, you might try something like this: 
my @sorted =
   ((sort {$order{$a} <=> $order{$b}}
   grep {exists $order{$_}} @to_be_ordered),
   grep {not exists $order{$_}} @to_be_ordered);

[download]
Of course, this runs through @to_be_ordered twice, which is inefficient. So you might use two temporary arrays: 
my (@exists, @not_exists);
push @{exists $order{$_} ? \@exists : \@not_exists }, $_ for @to_be_or
+dered;
my @sorted = ((sort {$order{$a} <=> $order{$b}} @exists), @not_exists)
+;

[download]

-- Mike

--
just,my${.02}

In reply to Re: (FoxUni) Re: Sorting an array based on hash values by thelenm
in thread Sorting an array based on hash values by kevsurf

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