Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
What is wrong with this one?
echo commons-logging.jar | perl -pe 's/(.*?)([^s]+\.jar)/$1 $2/'
commons -logging.jar
I would expect $2 to capture the whole commons-logging.jar?
Especially as
echo commons-logging.jar | perl -pe 's/([^s]+\.jar)/$1/'
commons-logging.jar
The first one says “capture everything non-greedily up until the first character thats not an “s” and put it into $1 (hence $1 = common) and than put everything after that match that ends in “.jar” into $2 (hence $2 = “-logging.jar”).
The second form says “capture everything staring with at least one or more characters that are not an “s” (there4fore the capture begins at “c”) followed by the something that ends in “.jar” (hence you get the whole “commons-logging.jar” in $1)