Re: Re: How to use Rules on Sequences?
- To: mathgroup at smc.vnet.net
- Subject: [mg29549] Re: [mg29510] Re: How to use Rules on Sequences?
- From: BobHanlon at aol.com
- Date: Sun, 24 Jun 2001 02:01:02 -0400 (EDT)
- Sender: owner-wri-mathgroup at wolfram.com
In a message dated 2001/6/23 2:39:19 AM, dmueller at mathematik.uni-kassel.de
writes:
>This works fine for Emil :)
>I hat an Idea to have a rule not using any
>Context-Function.
>But I see, this simply cannot happen in
>Mathematica.
>So my Problem that x_, y_?Positive, x_ :> SUBST
>isn't syntactically correct, has no Importance,
>{x__[y___, a_, z___] ->x[y,SUBST,z]} suffices,
>because "everything is a Function".
>
For a rule in which Emil is not explicit:
Emil[1,2,3,2,0,a,b,c] //.
f_[s___, x_, y_?Positive, x_, e___] :> f[s, x, 0, x, e]
Emil[1, 2, 0, 0, 0, a, b, c]
Bob Hanlon
Chantilly, VA USA