##
Right operand is an ARRAY:
...
Any ARRAY smartmatch each ARRAY element
like: grep { Any ~~ $_ } ARRAY
##
##
Num nummy numeric equality
like: Num == nummy
##
##
Either an actual number, or a string that looks like one.
##
##
grep { $selection ~~ $_ } (5103)
##
##
$selection == 5103
##
##
use constant FOO => 42;
##
##
sub FOO() { return 42; }