Windows 7 上的 Ruby 错误 Errno::ENOENT：

Question

我需要在 ruby​​ 提示符下发出命令

irb(main):007:0> f = File.new("C:\Users\ABHIJI~1.SHE\AppData\Local\Temp\myoutp>
Errno::ENOENT: No such file or directory - ls -alF C:UsersABHIJI\~1.SHEAppDataLo
calTemp\myoutput.txt
        from C:/Ruby/Ruby193/lib/ruby/gems/1.9.1/gems/awesome_print-1.1.0/lib/aw
esome_print/formatter.rb:191:in ``'
        from C:/Ruby/Ruby193/lib/ruby/gems/1.9.1/gems/awesome_print-1.1.0/lib/aw
esome_print/formatter.rb:191:in `awesome_file'
        from C:/Ruby/Ruby193/lib/ruby/gems/1.9.1/gems/awesome_print-1.1.0/lib/aw
esome_print/formatter.rb:26:in `format'
        from C:/Ruby/Ruby193/lib/ruby/gems/1.9.1/gems/awesome_print-1.1.0/lib/aw
esome_print/inspector.rb:137:in `unnested'
        from C:/Ruby/Ruby193/lib/ruby/gems/1.9.1/gems/awesome_print-1.1.0/lib/aw
esome_print/inspector.rb:104:in `awesome'
        from C:/Ruby/Ruby193/lib/ruby/gems/1.9.1/gems/awesome_print-1.1.0/lib/aw
esome_print/core_ext/kernel.rb:10:in `ai'
        from C:/Ruby/Ruby193/lib/ruby/gems/1.9.1/gems/awesome_print-1.1.0/lib/aw
esome_print/core_ext/kernel.rb:15:in `ap'
        from C:/Ruby/Ruby193/lib/ruby/gems/1.9.1/gems/awesome_print-1.1.0/lib/aw
esome_print/inspector.rb:31:in `output_value'
        from C:/Ruby/Ruby193/bin/irb:12:in `<main>'

我已经给出了临时文件夹的路径。 我使用的是 Windows 7，Ruby 路径是 C:\Ruby\Ruby193\bin

Answer 1

反斜杠字符用作“转义字符”，用于在字符串中插入特殊字符。例如，要插入制表位，您可以使用“\t”。如果你想拥有一个文字 \，你必须用另一个 \ 转义它。所以你的字符串应该是"C:\\Users\\ABHIJI~1.SHE\\AppData\\Local\\Temp\\myoutput.txt"。

例子：

# right
>> puts "C:\\Users\\ABHIJI~1.SHE\\AppData\\Local\\Temp\\myoutput.txt"
C:\Users\ABHIJI~1.SHE\AppData\Local\Temp\myoutput.txt
=> nil

# wrong
>> puts "C:\Users\ABHIJI~1.SHE\AppData\Local\Temp\myoutput.txt"
C:UsersABHIJI~1.SHEAppDataLocalTempmyoutput.txt
=> nil

但是，您也可以在路径中使用正斜杠，即使在 Windows 上也是如此。更多详情，请看这个答案https://stackoverflow.com/a/14875567/1067124。