Using any or none on the hash keys and values in Raku

Question

I'm trying to use the any or none on the keys or values of a hash like that:

my %w=(a => 1, b => 2);
say %w.keys; # works
say so 'a' == %w.keys.any; # doesn't work

I've checked the Raku documentation's hash and map section but couldn't fix this issue. How to fix it? Thanks.

Answer 1

The code dies like this:

Cannot convert string to number: base-10 number must begin with
valid digits or '.' in '⏏a' (indicated by ⏏)

This happens because == is the numeric comparison operator, so it first tries to coerce the arguments into a number before doing the comparison.

Hash keys - at least by default - are strings, thus the eq operator for string comparison is needed here:

my %w=(a => 1, b => 2);
say so 'a' eq %w.keys.any; # True

Answer 2

use cmp operator when compares with string:

say so 'a' cmp %w.keys.any;