Unicode-savvy `letter_or_digit?` function?

Questions & Help Questions
3

I think you’re mistaken. Strings and charlists are not the same thing. Just to confirm:

iex(1)> x = '1234'  # note: single-quote to make it a charlist, not a binary / string
'1234'
iex(2)> Regex.match?(~r/23/, x)
** (FunctionClauseError) no function clause matching in Regex.match?/2    
    
    The following arguments were given to Regex.match?/2:
    
        # 1
        ~r/23/
    
        # 2
        '1234'
    
    Attempted function clauses (showing 1 out of 1):
    
        def match?(%Regex{re_pattern: compiled}, string) when is_binary(string)
    
    (elixir) lib/regex.ex:231: Regex.match?/2