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Re: How to manipulate globals in a function?

• To: mathgroup at smc.vnet.net
• Subject: [mg73772] Re: How to manipulate globals in a function?
• From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
• Date: Wed, 28 Feb 2007 04:29:40 -0500 (EST)
• Organization: Uni Leipzig
• References: <erop34$94v$1@smc.vnet.net>
• Reply-to: kuska at informatik.uni-leipzig.de

Hi,

and simsalibim & abrakadabra

SetAttributes[Moo, HoldFirst]

Moo[A_, i_Integer] :=(A[[i]] = 7)

will work.

Regards
   Jens

davisjf at gmail.com wrote:
> I am trying to write code to manipulate a global array in a function.
> How do something like this:
> 
> Moo [A_List, i_Integer] :=
> 
>       A[[i]] = 7;
> 
> Moo[A, 1]
> 
> This fails.  But, if I do this without a funciton it works.
> 
> i=1
> A[[i]] = 7
> 
> JD
> 
>