Sorts strings, prefer letters to numbers

sortStringsBeforeLetters.xq

(:~
 : Sorts strings, prefer letters to numbers.
 : @param  $items strings to be sorted
 : @return sorted sequence
 : Christian Grün on SlackXML 2020
 :)
declare function local:sort(
  $items  as xs:string*
) as xs:string* {
  sort($items, (), function($item) {
    $item
    => lower-case()
    => normalize-space()
    => replace('(\p{L})', 'A$1') (: letters :)
    => replace('(\p{N})', 'B$1') (: numbers :)
    => replace('([^\p{L}\p{N}])', 'C$1') (: everything else :)
  })
};
local:sort(('jack', ' John', '184', 'Sean'))