Hi,

At Mon, 7 Sep 2009 15:12:16 +0900,
Vit Ondruch wrote in [ruby-core:25452]:
> In following example, just characters from US-ASCII are used
> and in this case the addition works well.
> 
> s = 'abc'
> a = s.encode 'cp1250'
> b = s.encode 'utf-8'
> c = a + b

Because no conversion is needed.

-- 
Nobu Nakada