我不明白这里发生了什么。我应该如何使用gsub来获取字符串“Yaho o”？
>> "Yaho o".gsub("Y", "\Y")
=> "\Yaho o"
>> "Yaho o".gsub(" ", "\ ")
=> "Yahooo"
means $ which is everything after the match. Escape the again and it works
"Yaho o".gsub(" ", "\\ ")
"Yaho o".gsub(" ", "\\ ")
因为您正在转义转义字符以及转义单引号。
这个也可以，而且会更易读一些：
def escape_single_quotes(str)
str.gsub(/ /) { |x| "\#{x}" }
end
如果你想同时避免单引号和反斜杠，以便将该字符串嵌入双引号Ruby字符串中，则可以使用以下内容：
def escape_single_quotes_and_backslash(str)
str.gsub(/\| /) { |x| "\#{x}" }
end
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