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my %opt;
my @vals = qw(title artist album);
my @opts = map { "$_=s" => \$opt{$_} } @vals;

Not enough arguments for map at test.pl line 3, near "} @vals"
syntax error at test.pl line 3, near "} @vals"
Execution of test.pl aborted due to compilation errors.

Not enough arguments for map at test.pl line 1, near "} qw(1 2 3)"
syntax error at test.pl line 1, near "} qw(1 2 3)"
Execution of test.pl aborted due to compilation errors.