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Testing the Head of List Elements

  • To: mathgroup at
  • Subject: [mg25200] Testing the Head of List Elements
  • From: "Marshall Bartlett" <mgb_news at>
  • Date: Fri, 15 Sep 2000 02:21:40 -0400 (EDT)
  • Organization: University of Utah
  • Sender: owner-wri-mathgroup at

I'm something of a newbie with Mathematica; please excuse my ignorance.

I am looking for a clever way to select elements from a list based on their
type (Head).  Specifically, I want to extract all the elements of type
dtring from a list of elements of different types (string, number,
character, etc.).

Any suggestions?

Marshall Bartlett
Department of Geology and Geophysics
University of Utah
mgb_news at

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