> Repeat-By: > shopt -u extglob > isnum () ( shopt -s extglob; case "$1" in [1-9]*([0-9])) return 0 ;; > *) return 1 ;; esac; )
Remember that bash parses and interprets the script line-by-line. If you want to change the parser's operation (for example, have it recognize the extglob patterns), you have to do it in a different line than where you're using the special syntax. If you have: shopt -s extglob; ls @(foo|bar) in the same line, it first processes the complete line, and fails at the extglob, before getting to execute the shopt command. This is not a bug btw, it's just a consequence of how bash works. -- Eduardo Bustamante https://dualbus.me/
