On Fri, Apr 08, 2016 at 09:26:47AM -0000, Charles T. Smith wrote: > Does anybody know how to use ?(pattern)? Or @(pattern)? Or any of them > except !(pattern)? If you do an internet search, the man page is always > blithely quoted, but only !(pattern) is ever demostrated... > I wonder if the others even work? > > ?(pattern-list) > Matches zero or one occurrence of the given patterns
imadev:~$ cd tmp imadev:~/tmp$ ls imadev:~/tmp$ shopt -s extglob imadev:~/tmp$ touch a.foo b.bar c.gif d.jpg imadev:~/tmp$ echo a.foo?(zebra) a.foo > *(pattern-list) > Matches zero or more occurrences of the given patterns imadev:~/tmp$ echo a.f*(o) a.foo > +(pattern-list) > Matches one or more occurrences of the given patterns imadev:~/tmp$ echo *.+(gif) c.gif > @(pattern-list) > Matches one of the given patterns imadev:~/tmp$ echo *.@(foo|bar) a.foo b.bar > !(pattern-list) > Matches anything except one of the given patterns imadev:~/tmp$ echo !(*.jpg) a.foo b.bar c.gif
