如何使用ruby 1.9转换字​​符编码

问题描述

该服务返回一个包含unicode字符的字符串： Learn Objective\xE2\x80 \x93C在Mac（学习系列）

与ruby 1.9.1字符串甚至不能被处理：

  REXML :: ParseException：＃< Encoding :: CompatibilityError：不兼容的编码regexp匹配（UTF-8正则表达式与ASCII-8BIT字符串）> 
 
 ... 
 
异常解析
 
行：1 
 
位置：1636 
 
最后80个未消耗的字符：
 
在Mac上学习Objective-C（学习系列）
  

解决方案

作为异常点，您的字符串是ASCII-8BIT编码的。您应该更改编码。有一个，但如果您对快速解决方案感兴趣，只需 force_encoding 在您执行任何处理之前：

  s =学习目标Mac上的\\ xE2\x80\x93C
＃=> 在Mac上学习Objective\xE2\x80\x93C
 s.encoding 
＃=> ＃<编码：ASCII-8BIT> 
 s.force_encoding'utf-8'
＃=> 在Mac上学习Objective-C
  

i am currently having trouble with results from the amazon api.

the service returns a string with unicode characters: Learn Objective\xE2\x80\x93C on the Mac (Learn Series)

with ruby 1.9.1 the string could not even been processed:

REXML::ParseException: #<Encoding::CompatibilityError: incompatible encoding regexp match (UTF-8 regexp with ASCII-8BIT string)>

...

Exception parsing

Line: 1

Position: 1636

Last 80 unconsumed characters:

Learn Objective–C on the Mac (Learn Series)

解决方案

As the exception points, your string is ASCII-8BIT encoded. You should change the encoding. There is a long story about that, but if you are interested in quick solution, just force_encoding on the string before you do any processing:

s = "Learn Objective\xE2\x80\x93C on the Mac"
# => "Learn Objective\xE2\x80\x93C on the Mac"
s.encoding
# => #<Encoding:ASCII-8BIT>
s.force_encoding 'utf-8'
# => "Learn Objective–C on the Mac"

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