Detect upper case characters (UTF-8 category Lu)

Detect lower case characters (UTF-8 category Ll)

Detect letters (UTF-8 categories Lu, Ll, Lt, Lm, Lo)

Detect letters or digits (UTF-8 categories Lu, Ll, Lt, Lm, Lo, Nd, Nl, No)

Detect digits (UTF-8 categories Nd, Nl, No)

A category as defined by the Unicode standard.

Get the UTF category. Warning: this function is very big. You should usually use one of the isXXX ones instead.

Parses a category name (Lu, Ll, Lt, ...).

Convert a category to its short category name (Lu, Ll, Lt, ...)

Converts a category to its English description. Mostly useful for debugging purposes.