如何使用Ruby 1.9检测字符串是否仅包含拉丁符号? [英] How to detect if string contains only latin symbols using Ruby 1.9?

问题描述

我需要检测某个字符串是否包含非拉丁字母的符号.数字和特殊符号(例如-，_，+)很好.我需要知道是否有任何非拉丁符号.例如:

I need to detect if some string contains symbols from a non latin alphabet. Numbers and special symbols like -, _, + are good. I need to know whether there is any non latin symbols. For example:

"123sdjjsf-4KSD".just_latin?

应返回true.

"12333ыц4--sdf".just_latin?

应返回false.

推荐答案

我认为这应该对您有用:

I think that this should work for you:

 # encoding: UTF-8

 class String
   def just_latin?
     !!self.match(/^[a-zA-Z0-9_\-+ ]*$/)
   end
 end

 puts "123sdjjsf-4KSD".just_latin?
 puts "12333ыц4--sdf".just_latin?

请注意，*#ascii_only?*也非常接近您想要的.

Note that *#ascii_only?* is very close to what you want as well.

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