在 Ruby 中的字符串中转义双反斜杠和单反斜杠
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Escape double and single backslashes in a string in Ruby
提问by konung
I'm trying to access a network path in my ruby script on a windows platform in a format like this.
我正在尝试以这样的格式在 Windows 平台上访问我的 ruby 脚本中的网络路径。
\servername\some windows share\folder 1\folder2\
Now If I try to use this as a path, it won't work. Single backslashes are not properly escaped for this script.
现在，如果我尝试将其用作路径，它将不起作用。此脚本未正确转义单个反斜杠。
path = "\servername\some windows share\folder 1\folder2\"
d = Dir.new(path)
I tried everything I could think of to properly escape slashes in the path. However I can't escape that single backslash - because of it's special meaning. I tried single quotes, double quotes, escaping backslash itself, using alternate quotes such as %Q{} or %q{}, using ascii to char conversion. Nothing works in a sense that I'm not doing it right. :-) Right now the temp solution is to Map a network drive N:\ pointing to that path and access it that way, but that not a solution.
我尝试了所有我能想到的方法来正确地避开路径中的斜线。但是我无法逃避那个反斜杠 - 因为它的特殊含义。我尝试了单引号、双引号、转义反斜杠本身、使用替代引号（例如 %Q{} 或 %q{}），以及使用 ascii 到 char 的转换。从某种意义上说，我没有做对，没有任何作用。:-) 现在临时解决方案是映射网络驱动器 N:\ 指向该路径并以这种方式访问它，但这不是解决方案。
Does anyone have any idea how to properly escape single backslashes?
有谁知道如何正确转义单个反斜杠？
Thank you
谢谢
回答by John Douthat
Just double-up every backslash, like so:
只需将每个反斜杠加倍，如下所示：
"\\servername\some windows share\folder 1\folder2\"
回答by ma?ek
Try this
尝试这个
puts '\\servername\some windows share\folder 1\folder2\'
#=> \servername\some windows share\folder 1\folder2\
So long as you're using single quotes to define your string(e.g., 'foo'), a single \does not need to be escaped. except in the following two cases
只要您使用单引号来定义字符串（例如，'foo'），\就不需要对单引号进行转义。除了以下两种情况
\\works itself out to a single\. So,\\\\will give you the starting\\you need.- The trailing
\at the end of your path will tries to escape the closing quote so you need a\\there as well.
\\自行解决一个单一的\. 所以，\\\\会给你\\你需要的开始。\路径末尾的尾随将尝试逃避结束引号，因此您也需要\\那里。
Alternatively,
或者，
You could define an elegant helper for yourself. Instead of using the clunky \path separators, you could use /in conjunction with a method like this:
您可以为自己定义一个优雅的助手。\您可以/与这样的方法结合使用，而不是使用笨重的路径分隔符：
def windows_path(foo)
foo.gsub('/', '\')
end
puts windows_path '//servername/some windows share/folder 1/folder2/'
#=> \servername\some windows share\folder 1\folder2\
Sweet!
甜的！
