From: Hans Mackowiak <hanmac@...>
Date: 2011-07-14T21:50:28+09:00
Subject: Re: [Ruby/C] Very little piece of code driving me crazy

little point, you can use NIL_P(v) to check if its nil, its an macro 
wich makes a little bit shorter
and i does not use the using namespace, its okay if you only have one, 
but it can crash if you need more of them

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