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Testing the Head of List Elements

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

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?

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Marshall Bartlett
Department of Geology and Geophysics
University of Utah
mgb_news at hotmail.com
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• Follow-Ups:
  • Re: Testing the Head of List Elements
    • From: Ken Levasseur <Kenneth_Levasseur@uml.edu>