OptionQ (was Re: Re: Creating Raster Image Animation)
- To: mathgroup at smc.vnet.net
- Subject: [mg21946] OptionQ (was Re: [mg21905] Re: Creating Raster Image Animation)
- From: Preston Nichols <pnichols at wittenberg.edu>
- Date: Sat, 5 Feb 2000 00:49:20 -0500 (EST)
- References: <87au4p$nlt@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Dear Alan and other Mathematica sages, OptionQ is obviously very useful and valuable. My kernel knows all about OptionQ: In[1] := $Version Out[1] = 4.0 for Microsoft Windows (July 26, 1999) In[2] := ?OptionQ Out[2] = OptionQ[e] returns True if e can be considered an option or list of options, and False otherwise. but my Help Browser (including the Master Index and the Mathematica Book) has no knowledge of it at all. Should I draw any conclusion from this about OptionQ, or is this just one of those oversights that happen sometimes, because we're all merely human? Preston Nichols Mathematics and Computer Science Wittenberg University At 02:54 AM 02/04/2000 -0500, Allan Hayes wrote: >Mike, > >In ShowLife[list_, opts__Rule]:= > >try changing opts__Rule to opts___Rule >and for good measure change further to to opts___?OptionQ >The last form allows :> aas well as -> and also nested lists of options. > >Allan >--------------------- >Allan Hayes >Mathematica Training and Consulting >Leicester UK >www.haystack.demon.co.uk >hay at haystack.demon.co.uk >Voice: +44 (0)116 271 4198 >Fax: +44 (0)870 164 0565 > >