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Re: Default values / optional parameters

• To: mathgroup at smc.vnet.net
• Subject: [mg22074] Re: Default values / optional parameters
• From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
• Date: Sat, 12 Feb 2000 04:04:32 -0500 (EST)
• Organization: Universitaet Leipzig
• References: <880g4a$4so@smc.vnet.net>
• Sender: owner-wri-mathgroup at wolfram.com

Hi,

why not to use the FullForm[

Optional[somepattern,somevalue]

?

Regards
  Jens

Hermann Klocker wrote:
> 
> [Contact the author to obtain the notebook mentioned - moderator]
> 
> The sample notebook shows how two functions defined in a very similar
> manner behave differently when using optional parameters. Question: How
> can I define a function whose optional parameter is a pattern requiring
> a specific head and has a given default value? Help says this is x_h:v
> but my example says that this does not work in some cases.
> 
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