why lua need a dummy node?

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Subject: why lua need a dummy node?
From: Xavier Wang <weasley.wx@...>
Date: Tue, 11 Sep 2012 00:16:02 +0800

hi list,

i'm studying lua's implement now, i'm wondering why lua's table need a dummy node, why not just set node to NULL if table's hash part is empty? could someone tell me the reason?

regards,
Xavier Wang

Follow-Ups:
- Re: why lua need a dummy node?, Roberto Ierusalimschy
- Re: why lua need a dummy node?, 云风

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