Question

How can I use a regEx with grep so that I can check whether what I’m looking for is the first thing on the line ? What I want to do is find single line comments in a file, but I don’t want to grep stuff line http://path, so there can’t be anything behind // on the line.

Answer 1

$ echo $'http://www.example.com\n   // single line comment' | grep "^ *//.*"
   // single line comment