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.
source is 1234567890, the regular expression ((?<=\d)\d{3})*\b can match: 234567890, so i think sed should replace 234567890 with TEST, but the result is: 1234567890, why?
look-behind is not supported by sed.
you could try ssed (super sed), it supports perl mode, (-R) then you could pass perl style regex to it. e.g. look ahead/behind.
see the feature list:
https://launchpad.net/ssed