MathGroup Archive 2004

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Length of actual parameters in a function call.


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.

E. martin-Serrano



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