Re: delayed rule evaluation order
- To: mathgroup at smc.vnet.net
- Subject: [mg67992] Re: [mg67967] delayed rule evaluation order
- From: Andrzej Kozlowski <akoz at mimuw.edu.pl>
- Date: Thu, 20 Jul 2006 06:04:35 -0400 (EDT)
- References: <200607190921.FAA21363@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
On 19 Jul 2006, at 11:21, Chris Chiasson 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/
>
There are a number of ways to do this for this particular case
(including some very obvious ones which I will ignore) but some of
them may not work in the situation you seem to have in mind. It would
be helpful to see a little more of your Trace output, but anyway, it
seems to me that the following should work:
Hold[{2, 3}] /. {Hold[{x_, y_}] :> Hold@@{x^y}}
Hold[8]
Andrzej Kozlowski
- References:
- delayed rule evaluation order
- From: "Chris Chiasson" <chris@chiasson.name>
- delayed rule evaluation order