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MathGroup Archive 2007

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Re: Re: Re: Re: Re: Re: Re: v6: still no multiple undo?

  • To: mathgroup at
  • Subject: [mg77547] Re: [mg77522] Re: [mg77501] Re: [mg77495] Re: [mg77476] Re: [mg77433] Re: [mg77407] Re: v6: still no multiple undo?
  • From: DrMajorBob <drmajorbob at>
  • Date: Wed, 13 Jun 2007 07:15:53 -0400 (EDT)
  • References: <> <17563180.1181628402654.JavaMail.root@m35>
  • Reply-to: drmajorbob at

Well... I'm not against it. I just wouldn't spend my own money on it.


On Tue, 12 Jun 2007 00:16:27 -0500, Chris Chiasson <chris at>  

> Warning: speculation ahead
> On 6/11/07, DrMajorBob <drmajorbob at> wrote:
>> In Excel, if you copy a cell into another cell, you've also changed it,
>> usually; I like layered undo in that situation. Excel is a much easier
>> environment in which to PROVIDE multiple undo, too.
> You are certainly right that it would be very difficult to provide an
> undo that operates on the entire environment. However, that is
> probably not necessary. Think about Eclipse and Java. Eclipse provides
> "continuous" compilation of Java source code, but its undo operates
> only on the text of the source code. In Mathematica, the underlying
> notebook box expressions (usually?) only change when the user is
> editing or evaluating. Why can't notebook diffs be made and stored
> after each edit and evaluation? I am sure there is a good technical
> reason or two, but I don't think the inability to roll back the state
> of the kernel is a deal-breaking problem.
>> Overall, though, I agree with Andrzej that good work habits are the best
>> protection against errors.
> I agree, but that doesn't mean I couldn't use some help.

DrMajorBob at

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