Explain in plain English the following two regex:
Posted: Fri Jun 10, 2022 11:55 am
Explain in plain English the following two regex:
instructor@instructor-VirtualBox:~$ cat example_2.txt apple banana pear apple kiwi apple apple pear banana kiwi apple kiwi apple banana kiwi app apple apple app kiwi kiwi pear pear apple kiwi apple kiwi instructor@instructor-VirtualBox:~$ egrep '(\b\w+\b) (\b\w+\b) \ 1 \2' example_2.txt apple kiwi apple kiwi instructor@instructor-VirtualBox:~$
instructor@instructor-VirtualBox:~$ instructor@instructor-VirtualBox:~$ cat example_2.txt apple banana pear apple kiwi apple apple pear banana kiwi apple kiwi apple banana kiwi app apple apple app kiwi kiwi pear pear apple kiwi apple kiwi instructor@instructor-VirtualBox:~$ egrep '(\b\w+\b) \1' example_2.txt apple apple pear banana kiwi app apple apple app kiwi kiwi pear pear instructor@instructor-VirtualBox:~$
instructor@instructor-VirtualBox:~$ cat example_2.txt apple banana pear apple kiwi apple apple pear banana kiwi apple kiwi apple banana kiwi app apple apple app kiwi kiwi pear pear apple kiwi apple kiwi instructor@instructor-VirtualBox:~$ egrep '(\b\w+\b) (\b\w+\b) \ 1 \2' example_2.txt apple kiwi apple kiwi instructor@instructor-VirtualBox:~$
instructor@instructor-VirtualBox:~$ instructor@instructor-VirtualBox:~$ cat example_2.txt apple banana pear apple kiwi apple apple pear banana kiwi apple kiwi apple banana kiwi app apple apple app kiwi kiwi pear pear apple kiwi apple kiwi instructor@instructor-VirtualBox:~$ egrep '(\b\w+\b) \1' example_2.txt apple apple pear banana kiwi app apple apple app kiwi kiwi pear pear instructor@instructor-VirtualBox:~$