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The smartmatch implicitly dereferences any non-blessed hash or array r
+eference, so the HASH and ARRAY entries apply in those cases.

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; }