From: Lui Kore <usurffx@...>
Date: 2010-01-18T13:23:14+09:00
Subject: Re: Strange Encoding Behavior

I know String#encode doesn't change the original string, but the result 
is encoded.

To understand the problem, you should try in a gbk/shift-jis environment 
with some Chinese or Japanese path.

The point is:
For some path p1 and p2,
when p1 == p2 and p1.encoding == p2.encoding,
p1.encode('utf-8') == p2.encode('utf-8') is not always true.

To describe it in a "encode!" version:
For some path p1 and p2,
when p1 == p2 and p1.encoding == p2.encoding,
p1.encode!('utf-8')
p2.encode!('utf-8')
p1 == p2 is still not always true

Robert Klemme wrote:
> On 01/17/2010 04:55 AM, Lui Kore wrote:
>>       #=> "1.9.1 i386-mingw32" is my ruby version
>>       # changed at last
> I believe the point you are missing is that String#encode does not
> change the String but it returns a new String with the desired encoding.
>   If you want inplace modification you need to use String#encode! which
> does just that.
> 
> irb(main):006:0> s="foo"
> => "foo"
> irb(main):007:0> s.encoding
> => #<Encoding:UTF-8>
> irb(main):008:0> x = s.encode "ASCII"
> => "foo"
> irb(main):009:0> s.encoding
> => #<Encoding:UTF-8>
> irb(main):010:0> x.encoding
> => #<Encoding:US-ASCII>
> irb(main):011:0>
> 
> 
> Kind regards
> 
>   robert

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