FW: Re: Length of actual parameters in a function call. (Plus how to organize mathematica stuff)
- To: mathgroup at smc.vnet.net
- Subject: [mg47582] FW: [mg47498] Re: Length of actual parameters in a function call. (Plus how to organize mathematica stuff)
- From: "E. Martin-Serrano" <eMartinSerrano at houston.rr.com>
- Date: Fri, 16 Apr 2004 05:21:38 -0400 (EDT)
- Sender: owner-wri-mathgroup at wolfram.com
Yes Torben! You are right; it is exactly what I was looking for. Besides, to all those who responded to my posted, many thanks; in fact, I had begun to use the proposed solutions. By the way, I have plenty of badly-organized Mathematica stuff from different sources, and I am struggling to put some order on it. I would like to use some arrangement of (Windows) folders accessible through shortcuts which content could be illustrated by icons. Does anyone know about a collection of Mathematica-shaped icons that could be used to help in this purpose? Emilio. -----Original Message----- From: Torben Winther Graversen [mailto:immtwg at bohr.gbar.dtu.dk] To: mathgroup at smc.vnet.net Subject: [mg47582] [mg47498] Re: Length of actual parameters in a function call. E. Martin-Serrano <eMartinSerrano at houston.rr.com> wrote: : Hi, : A few weeks ago, reviewing some tutorials on pattern matching and error : handling, I came across an undocumented function to monitor the number of : parameters submitted to a function in a call; but somehow I lost its track : later. I guess that it must be something well-known by our specialists. Any : help about where to locate it? : The undocumented feature helps in tracking situations as when we define : "MyFunction[a_,b_,c_]:= something" and then it is called as "myFunction[a]" : leaving the function unevaluated. Hi, Perhaps the one you are looking for is ArgumentCountQ ? I stumbled on it a few days ago on Ted Ersek's Tricks page: http://www.verbeia.com/mathematica/tips/HTMLLinks/Tricks_210.html The documentation on Wolfram's site is at: http://support.wolfram.com/mathematica/kernel/Symbols/System/ArgumentCountQ. html ArgumentCountQ[head,len,min,max] tests whether the number len of arguments of a function head is between min and max. Regards, Torben