pub fn isalnum<D: Dimension>(a: &StringArray<D>) -> FerrayResult<Array<bool, D>>Expand description
Return true where every character is alphanumeric and the string is
non-empty. Matches numpy.strings.isalnum / CPython str.isalnum():
every character is alphabetic (isalpha) OR a decimal/digit/numeric
character (isdecimal/isdigit/isnumeric). Composes the corrected
predicates: ½ (numeric) and ② (digit) are alphanumeric.