The next extension for the grep challenge is now live: Printing Matches.
By the end of this extension, your grep implementation will support printing multiple matched lines.
$ echo -ne "line1\nline_two\nline3" | grep -E "\d"
line1
line3
Here’s the stage breakdown:
Please give this a try and let us know how it can be improved! @UdeshyaDhungana (author of this extension) and I will be available here to help out with any tester or instruction-related issues.