On a related note, what's a good editor for typing weird unicode characters that perl6 likes, such as double angle brackets « »?
Unless I missed it, nobody so far has provided link to the following documentation, which, I think, brings at least some partial answers to your question: https://docs.perl6.org/language/unicode_entry.

In reply to Re^3: Small Perl 6 discoveries IV, hash access by Laurent_R
in thread [Perl6] Perl 6 discoveries IV, hash access by holli

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