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MathGroup Archive 2007

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Re: v6: still no multiple undo?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg77542] Re: v6: still no multiple undo?
  • From: Szabolcs <szhorvat at gmail.com>
  • Date: Tue, 12 Jun 2007 01:27:05 -0400 (EDT)
  • Organization: University of Bergen
  • References: <200706080938.FAA03696@smc.vnet.net> <200706090943.FAA17991@smc.vnet.net> <acbec1a40706090337i64852d8cja3b1b942c7b29fec@mail.gmail.com> <06D466A7-0D44-40DB-ACB5-F488E9D2B08B@mimuw.edu.pl> <acbec1a40706090412u7c2da126nf291c7d4628d7c4a@mail.gmail.com> <14694989.1181527374589.JavaMail.root@m35> <f4j1ha$n3c$1@smc.vnet.net>

DrMajorBob wrote:
> If I have useful stuff in a cell, but I need to edit it, and I'm afraid I  
> might delete things I need, add things I don't need, change things that  
> are already perfect... well...
> 
> I just copy the cell and paste it above or below, and I edit the copy,  
> leaving the original alone!

And what if you are a bit tired, and press ctrl-v instead of ctrl-c by 
accident? V is right next to C on an English keyboard. Then you are 
exactly one keystroke away from loosing the contents of the cell.

Undo is not some kind of version control, it is there for undoing 
mistakes.  I don't understand why are some people arguing so strongly 
against it.  Saying that multiple undo (simple *editor undo*, not 
something interacting with the kernel) is a waste of resources is simply 
nonsense, especially if single-level undo is already implemented.

The Mathematica front end is probably the last editor in the 21st 
century that still does not support multiple undos.  If you have never 
made any stupid mistake that could have been easily undone in 2 or 3 
steps then I envy you, but it does not make things better for the rest 
of us.



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