From: Li Chen <chen_li3@...>
Date: 2009-02-11T23:48:58+09:00
Subject: Re: how to do the recursion

Pascal J. Bourguignon wrote:

> That's possible because we specified a default value of some of these 
> parameters.
> William specified an empty array as the default for result:  result = []
> I specified an empty string:                                 result=""
> That renders the corresponding argument optional.
> 
> (Of course, all the parameters with defaults must be last in the
> paramater list, and the optional arguments are assigned in order).

Hi Pascal,

Thanks for the explanation. But I wonder which page in the PickAxe 
mentions about this kind of usage?

Li

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