[vox-tech] ksh question

[Jay Strauss]

I going to (have) avoided the mess, but altering the script I didn't want to
alter


----- Original Message -----
From: "Jeff Newmiller" <jdnewmil@dcn.davis.ca.us>
To: <vox-tech@lists.lugod.org>
Sent: Monday, January 28, 2002 1:44 PM
Subject: Re: [vox-tech] ksh question


> On Mon, 28 Jan 2002, Jay Strauss wrote:
>
> > Sorry Jeff, You weren't talking to yourself, I wasn't around this
weekend
> >
> > To continue your example:
> >
> > $ var=value
> > $ ref=var
> > $ echo ${!ref}
> > value
> > $ var=newvalue
> > echo ${!ref}
> > ??????
>
>   $ echo ${!ref}
>   newvalue
>
> >
> > I don't have bash at work so I can't determine what the output is of the
> > above.  I'm running ksh on an HP, and the ${!ref} doesn't work
>
> Well, you still have the messy alternative I mentioned in my first
> message.
>
> >
> > Thanks
> > Jay
> >
> >
> > ----- Original Message -----
> > From: "Jeff Newmiller" <jdnewmil@dcn.davis.ca.us>
> > To: "vox-tech" <vox-tech@lists.lugod.org>
> > Sent: Saturday, January 26, 2002 10:49 PM
> > Subject: Re: [vox-tech] ksh question
> >
> >
> > > Sorry to carry on a conversation with myself, but I said...
> > >
> > > On Sat, 26 Jan 2002, Jeff Newmiller wrote:
> > >
> > > [...]
> > >
> > > > In bash, you can do:
> > > >
> > > >   $ var=value
> > > >   $ ref=var
> > > >   $ echo ${!ref}
> > > >   value
> > > >
> > > > but unfortunately, you cannot do
> > > >
> > > >   $ ${!ref}=anothervalue
> > >
> > > and after experimenting further, I find that the effect can be
obtained
> > > with:
> > >
> > >   $ eval $ref=other
> > >   $ echo $var
> > >   other
> > >
> > > This is still more like a pointer in C than a reference in C++.
> > >
> >
> --------------------------------------------------------------------------
> > -
> > > Jeff Newmiller                        The     .....       .....  Go
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> > rocks...2k
> >
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> --------------------------------------------------------------------------
-
> Jeff Newmiller                        The     .....       .....  Go
Live...
> DCN:<jdnewmil@dcn.davis.ca.us>        Basics: ##.#.       ##.#.  Live
Go...
>                                       Live:   OO#.. Dead: OO#..  Playing
> Research Engineer (Solar/Batteries            O.O#.       #.O#.  with
> /Software/Embedded Controllers)               .OO#.       .OO#.
rocks...2k
> --------------------------------------------------------------------------
-
>
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