Question

I have so many println(“”) in my codes .. I know it is messy … I want to put comment for each of the println(“”);

how to do that in VIM ? I mean I want to do that on multiple files.

Also if possible, can it detect whether the lines has // already or not … if the lines has been commented .. I don’t want to add new //

Answer 1

To append a //comment to all uncommented println(...) calls on their own lines:

:%s/^\(\s*println(.*);\)\s*$/\1\/\/comment/gc

To comment out all the uncommented println(...) calls on their own lines

:%s/^\(\s*println(.*);\)\s*$/\/\/\1/gc