How to replace multiple newlines in a row with one newline using Ruby

Question

I have a script written in ruby. I need to remove any duplicate newlines (e.g.)

\\n
\\n
\\n

to

\\n

My current

Answer 1

Ruby needs the backslashes escaped differently than you have provided.

str.sub!("\\\\n+\\\\n","\\\\n")

http://www.ruby-forum.com/topic/176239