From: "Peña, Botp" <botp@...>
Date: 2008-04-24T19:01:13+09:00
Subject: Re: puts "\\".gsub("\\", "\\\\")

From: martinus [mailto:martin.ankerl@gmail.com] 
# Hello, I have a mini-ruby quiz. Guess what this line of code writes to
# the console, then try it for yourself:
# puts "\\".gsub("\\", "\\\\")

puts "\\".gsub("\\", "\\\\")
\
#=> nil

# Why is that so?

faq. escaping the escape in sub/gsub. search the archives.

maybe you want something like, 

puts "\\".gsub("\\"){"\\\\"}
\\
#=> nil

ie, use block wc is a lot more handy.

kind regards -botp