=:= is the operator to check if the operands refer to the same object. A Boolean value is returned. The operator is called the container identity operator.
my $x = 42; my $y := $x; say $x =:= $y; # True say $y =:= $x; # True
📘 Universal comparison operator =:= in Raku
N. B. Perl 6 has been renamed to Raku. Click to read more.