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Re: how to get an assignment from a rule ?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg29337] Re: how to get an assignment from a rule ?
  • From: "Allan Hayes" <hay at haystack.demon.co.uk>
  • Date: Thu, 14 Jun 2001 02:27:17 -0400 (EDT)
  • References: <9g7411$cf3$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

Guido:

Set@@@{a->b,c->d};

or in fuller form,

Apply[Set,{a->b,c->d},{1}];

each give us

{a,c}

        {b,d}

Apply replaces heads:

A@@@{B[x,y], C[x,y]}

        {A[x,y],A[x,y]}

--
Allan
---------------------
Allan Hayes
Mathematica Training and Consulting
Leicester UK
www.haystack.demon.co.uk
hay at haystack.demon.co.uk
Voice: +44 (0)116 271 4198
Fax: +44 (0)870 164 0565

"Guido Carlet" <carlet at sissa.it> wrote in message
news:9g7411$cf3$1 at smc.vnet.net...
> Anybody knows how to do this in Mathematica ?
>
> I have a list of rules:
>
> {a->b,  c->d}
>
> and  I want to get the corresponding  assignments:
>
> a = b
>
> c = d
>
> Is there a command in Mathematica to do this ?
>
> Thank you !
>
>
>
>




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