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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