MathGroup Archive 1997

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Any uses for SequenceHold ?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg7501] Any uses for SequenceHold ?
  • From: Ersek_Ted%PAX1A at mr.nawcad.navy.mil
  • Date: Sat, 7 Jun 1997 03:48:24 -0400 (EDT)
  • Sender: owner-wri-mathgroup at wolfram.com

Mma 3.0 has a new Attribute called SequenceHold.
As far as I can tell this Attribute has no useful application.

However there are exactly nine built in functions
that have this Attribute.    They are:
    Rule
    RuleDelayed
    Set
    SetDelayed
    TagSet
    TagSetDelayed
    Timing
    UpSet
    UpSetDelayed

I used a method in Dave Wagner's book to get the above information.
In what way would things fail to work if these function didn't have this 
Attribute?

How did ealier versions get by without SequenceHold?


               Ted Ersek
               ersek_ted%pax1a at mr.nawcad.navy.mil



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