Escaping \ in regular expressions in Ruby

I was parsing a file and some lines of the file ended with "\". I wanted to use gsub to find and replace it. I tried '\' and /\/ and neither one correctly matched "\".

I ended up getting around it by using a combination of chop and strip but it left me thinking how would I do this if I ever need to ag开发者_运维百科ain?

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You need to escape the escape sign as well. So this should work:

/\\/

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Passing a string to gsub that will then be compiled to a regex:

"abc\def".gsub("\\", "")
=> "abcdef"

Or just providing the regex directly:

"abc\def".gsub(/\\/, "")
=> "abcdef"