Re: Rules
- To: mathgroup at smc.vnet.net
- Subject: [mg66407] Re: [mg66359] Rules
- From: Adriano Pascoletti <pascolet at dimi.uniud.it>
- Date: Thu, 11 May 2006 02:16:49 -0400 (EDT)
- References: <200605101034.GAA21926@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
On 10 mag 2006, at 12:34, Marcin Rak wrote:
> Hey everyone,
>
> I had two simple questions, and was wondering wether anyone could
> through
> something my way:
>
> 1) When we have a list, call it AList, and we type the following
> AList /. {rule1}
> AList /. rule1
> what is the difference between the two?
From the help for ReplaceAll:
expr /. rules applies a rule or list of rules in an attempt to
transform EACH SUBPART of an expression expr.
so AList /. {rule1} and AList /. {rule1} are equivalent if rule1 is a
Rule expression.
> And, how would I go about
> defining a rule for the variable AList, and a rule for the contents
> of the
> list - obviously these are two different concepts, yet how would you
> differentiate b/w the two?
>
From the help for Replace:
Replace[expr, rules] applies a rule or list of rules in an attempt to
transform the ENTIRE expression expr
Adriano Pascoletti
- References:
- Rules
- From: Marcin Rak <umrakmm@cc.umanitoba.ca>
- Rules