How to sort a list with a given order?

my @orderby = qw( car boat chicken cat dog mouse );
my @list    = qw( boat car mouse chicken );

my %orderby = map { $orderby[$_] => $_ } 0..$#orderby;

my @sorted = sort { $orderby{$a} <=> $orderby{$b} } @list;

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Or if you want to mess with people's minds,

my @orderby = qw( car boat chicken cat dog mouse );
my @list    = qw( boat car mouse chicken );

my %counts; ++$counts{$_} for @list;
my @sorted = map { ($_) x ($counts{$_}||0) } @orderby;