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MathGroup Archive 2001

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Re: Extracting the name of a variable

  • To: mathgroup at smc.vnet.net
  • Subject: [mg26943] Re: Extracting the name of a variable
  • From: Mike Yukish <may106 at psu.edu>
  • Date: Sat, 27 Jan 2001 20:00:10 -0500 (EST)
  • Organization: Penn State University, Center for Academic Computing
  • References: <94tl4s$lck@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

"Ersek, Ted R" wrote:

> Mike Yukish asked how one can take a variable which has a value assigned and
> convert it to a string without letting it evaluate.
>
> I provide the solution in the section for (ToString) on my web site.  The
> URL is
> http://www.verbeia.com/mathematica/tips/Tricks.html

Many thanks to all who replied. I posed my problem as a subpart of a more
complex problem, which still defeats me. I had hoped to Map[ ] the function
extractName over a list, and extract the names of all the variables in the list.
Ted has identified its difficulties, which I offer up here.

Problem: Create a function that takes a list of variables, and extracts the
symbol name of each. This is an added level over the initial problem.

q=4
z=5

list1={q,z,w}

extractNamesFromList[list1]

out[]:=

{"q","z","w"}

Ted Ersek and Bob Hanlon have both shown me how to create a function that will
work with

extractNamesFromList[{q,z,w}]

out[]:=
{"q","z","w"}


but  extractNamesFromList[list1]
out[]:=
"list1"

So passing a predeclared list is a different story, and Ted pointed that out. I
think I can live with the restriction, though.





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