I have been looking around a bit for a way to extract parts of a
string using a specific patter. More in details I am writing a
program to insert id3 tags based on the file name.
Let's say I have the file named: song - someartist - 5 - album.mp3.
The user shall then be able to type in a pattern like %s - %a - %t - %
b (%s represents songname, %a - artist, %t, tracknumber, and %b -
album).
Right now I am trying to solve this with NSScanner but thought it
might be easier using NSPredicate or Regex.
