$ cat foo $foo ->[2]; print $_->{bar}; $sum += $_->[0] for @array; $ fgrep -e '->' foo | perl -nwe '/(\S{3,80}->\S{5,80})/;print $1,"\n"' Use of uninitialized value $1 in print at -e line 1, <> line 1. Use of uninitialized value $1 in print at -e line 1, <> line 2. Use of uninitialized value $1 in print at -e line 1, <> line 3. $