问题
I just faced this question in interview. Is it possible to escape character within single quotes in ruby?
The confusion is in following code
puts '\\' # Output: \
puts '\n' # Output: \n
It seems that backword slash is escaped but the newline character isn't.
I am aware of this question but I am not asking about difference between single and double quote. I am asking about whether it's possible to escape characters in single quotes or not? And why only backslash is allowed to escape?
回答1:
The only characters that needs to be escaped in a single quoted string are '\\' (for backslash \) and '\'' (for single quote ' itself).
来源：https://stackoverflow.com/questions/25499046/is-it-possible-to-escape-character-within-single-quotes-in-ruby