gem "unicode-numeric_value"

require "unicode/numeric_value"
Unicode::NumericValue.of("1") # => 1
Unicode::NumericValue.of("Ⅷ") # => 8
Unicode::NumericValue.of("⓳") # => 19
Unicode::NumericValue.of("¾") # => (3/4)
Unicode::NumericValue.of("༳") # => (-1/2)
Unicode::NumericValue.of("𑿀") # => (1/320)
Unicode::NumericValue.of("𖭡") # => 1000000000000
Unicode::NumericValue.of("五") # => 5
Unicode::NumericValue.of("𜳷") # => 7
Unicode::NumericValue.of("A") # => nil

require "unicode/numeric_value"
require "unicode/name" # https://github.com/janlelis/unicode-name
puts "Codepoint | Character | Numeric Value | Name\n" \
     "----------|-----------|---------------|-----\n" +
    Unicode::NumericValue.chars.map{ |char|
      [
        format("U+%.4X", char.unpack("U")[0]).rjust(9),
        char.rjust(9),
        Unicode::NumericValue.of(char).inspect.rjust(13),
        Unicode::Name.of(char)
      ].join(" | ")
    }.join("\n")