Re: Problem with matching.
- To: mathgroup at smc.vnet.net
- Subject: [mg53918] Re: [mg53907] Problem with matching.
- From: DrBob <drbob at bigfoot.com>
- Date: Fri, 4 Feb 2005 04:11:13 -0500 (EST)
- References: <200502022310.SAA11969@smc.vnet.net>
- Reply-to: drbob at bigfoot.com
- Sender: owner-wri-mathgroup at wolfram.com
I think it's because the two a_ patterns aren't treated as representing the same a.
But this works:
F[{x, 2, c}]*F[{x, 1, f}] /. F[{___, a_, ___}]*F[{___, b_, ___}] /; a == b :> yes
yes
Bobby
On Wed, 2 Feb 2005 18:10:51 -0500 (EST), Josef Karthauser <joe at tao.org.uk> wrote:
> Can someone tell me why this doesn't match?
>
> F[{x, 2, c}]F[{x, 1, f}] /. F[{___, a_, ___}]F[{___, a_, ___}] :> yes
>
> I'm expecting 'yes' to be returned if any of the list arguments to F[]
> contain the same value. It doesn't match however; what am I doing
> wrong?
>
> Thanks,
> Joe
> --
> Josef Karthauser (joe at tao.org.uk) http://www.josef-k.net/
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- References:
- Problem with matching.
- From: Josef Karthauser <joe@tao.org.uk>
- Problem with matching.