From: Roger Pack <rogerpack2005@...>
Date: 2010-08-20T00:51:22+09:00
Subject: Re: Is this a bug of String#count?

>>> s = "a\u4e00"

>>> s.count("^a")
> => 0
> 
> Why the above result is 0 not 1? After all there are 2 characters
> in the string s. Is this a bug of String#count?

count returns the sum of occurrences of characters.  I don't see any ^a 
in the original string...
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