> -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] > > Q1. Querying info sed reveals the expression matcher to be "greedy", > matching the longest possible string. Is there a way to make > it match the > shortest possible, so that echo aaabbbccc | sed 's/^.*b//' > (altered but > similar) grabs aaab not aaabbb?
echo aaabbbccc | sed 's/^[^b]*b//' but that actually replaces 'aaab' with '', leaving 'bbccc' echo aaabbbccc | sed 's/b.*$/b/' will leave you with 'aaab'. > Q2. Is there a way using the supplied sed without major > enhancements to > change "abc x def" to "def x abc": that is, to grab two > distinct portions > and swap them (using $1,$2 or \1,\2 or whatever). echo abc x def | sed 's/\(.*\) x \(.*\)/\2 x \1/' will do the job. Replace the '.*'s with REs that match the side expressions, and ' x ' with an expression matching your delimiter. Enjoy Dave. -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/
