Wie viele Treffer hat man mit dem Regulären Ausdruck
[^a-zA-ZüöÄÖÜ]
in folgender Zeichenkette?
^=Match a single character not present in the list below [^a-zA-ZüöÄÖÜ]
a-z matches a single character in the range between a (index 97) and z (index 122) (case sensitive)
A-Z matches a single character in the range between A (index 65) and Z (index 90) (case sensitive)
üöÄÖÜ matches a single character in the list üöÄÖÜ (case sensitive)
s matches any whitespace character