From: "Brian Schröder" <ruby.brian@...>
Date: 2005-08-15T16:49:41+09:00
Subject: Re: utf8 string with reverse question

On 15/08/05, Mitch Tishmack <idylls@gmail.com> wrote:
> Hi everyone, long time lurker here. Even longer Ruby user.
> 
> I have a minor problem with a utf8 string.
> 
> In short I see this behavior:
> 
> "Stuhlu".sub(/u/,'�')
> => "St�hlu"
> "Stuhlu".reverse.sub(/u/,'�').reverse
> => "Stuhl\274\303"

It seems like reverse is acting on the string as a byte-array. That
means you are reversing the two byte character � = '\303\274' into the
non-character '\274\303' when reversing the string '�hlutS'

Are you trying to build a german -> pig-t�rkisch translator ;)

regards,

Brian

> "Stuhlu".reverse.sub(/u/,'�').split(//).reverse.join
> => "Stuhl�"
> 
> The general goal is to sub the final "u" in that word with an
> umlauted version and not the first. I started irb with -Ku so that I
> get utf8 support in all things ruby. But the behavior of reverse on
> the substituted string is really baffling me.
> 
> Does anyone know the reason for the weirdness of reverse after the
> sub? The last version was a hack to get things to just work. Am I
> mising a Regexp option that would make the final match work? I don't
> normally look for a final match to substitute on. And reverse seemed
> the most logical choice for a solution.
> 
> Any help would be appreciated!
> 
> Thanks,
> Mitch
> 


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