Documentation for method univals assembled from the following pages:

Class: Str §

From Str

(Str) method univals §

multi method univals(Str:D: --> List)

Returns a list of numeric values represented by each codepoint in the invocant string, and NaN for non-numeric characters.

say "4a¾".univals;  # OUTPUT: «(4 NaN 0.75)␤»