my @numbers = (2);  =>  my @numbers = 2;
my @other = (2);    =>  my @other = 2;
@numbers ~~ (2)     =>  @numbers ~~ 2
my @empty = ();     =>  my @empty;

##</code><code>##

>perl -E"@a = qw(a b); say @a ~~ 2 ? 'match' : 'no match'"
no match

>perl -E"@a = qw(a b); say @a ~~ (0+\@a) ? 'match' : 'no match'"
match

##</code><code>##

>perl -E"@a = qw(a b); say \@a ~~ \@a ? 'match' : 'no match'"
match

##</code><code>##

>perl -E"@a = qw(a b); @b = qw(a b); say \@a ~~ \@b ? 'match' : 'no match'"
match