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Re: delayed rule evaluation order

  • To: mathgroup at smc.vnet.net
  • Subject: [mg68001] Re: [mg67967] delayed rule evaluation order
  • From: "Christoph Lhotka" <lhotka at astro.univie.ac.at>
  • Date: Thu, 20 Jul 2006 06:04:43 -0400 (EDT)
  • Sender: owner-wri-mathgroup at wolfram.com

Hello, try this:

In[]:= Hold[{2, 3}] /. Hold[{x_, y_}] :>f[x^y] /. f -> Hold
Out[]:=Hold[8]

wkr, christoph


On Wed, 19 Jul 2006 05:21:08 -0400 (EDT)
 "Chris Chiasson" <chris at chiasson.name> wrote:
> Hold[{2, 3}] /. {{x_, y_} :> x^y}
> 
> the result is Hold[Power[2,3]]
> 
> I would like the result to be Hold[8]
> 
> The original context is post-processing of a large Trace output (via
> SetPrecision to get rid of digits and improve readability).
> 
> Any ideas?
> 
> -- 
> http://chris.chiasson.name/
> 

-- Mag. Christoph Lhotka --
University of Vienna / Institute for Astronomy
fon. +43 (1) 4277 51841
mail. lhotka at astro.univie.ac.at


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