ruby - 字符串中的反斜杠返回两个反斜杠

Question

我输入了这个访问 token 值

864876322670016\u00257C4e1d481ecad9eb45b9386745.1-1026038548\u00257CshuA8v7lgo7-hRr2AjbUBd3shek

在表单上，​​但它返回时带有这样的双反斜杠

864876322670016\\u00257C4e1d481ecad9eb45b9386745.1-1026038548\\u00257CshuA8v7lgo7-hRr2AjbUBd3shek

我将这个值传递给 Facebook GraphAPI，这会返回一个错误。

我怎样才能用一个反斜杠替换双反斜杠？或者有没有办法让双反斜杠不出现？

Answer 1

您确定返回的是双反斜杠吗？在内部带有反斜杠的字符串看起来像是有双反斜杠，因为 Ruby 正在转义它们:

> a = 'aaa\bbb\ccc'
=> "aaa\\bbb\\ccc"           # Looks like doubles
> a
=> "aaa\\bbb\\ccc"
> a.inspect
=> "\"aaa\\\\bbb\\\\ccc\""   # Looks even worse
> puts a
aaa\bbb\ccc                  # ...but it isn't

但是如果它们是双反斜杠，你可以这样做:

> puts aa
aaa\\bbb\\ccc                # String with double backslash
> aa.gsub!("\\\\", "\\")
> puts aa
aaa\bbb\ccc