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Re: Re-virginating Manipulates?

• To: mathgroup at smc.vnet.net
• Subject: [mg114394] Re: Re-virginating Manipulates?
• From: AES <siegman at stanford.edu>
• Date: Fri, 3 Dec 2010 05:19:57 -0500 (EST)
• References: <id2elh$d6s$1@smc.vnet.net>

> In the Cell menu, "Delete All Output" will get rid of all of the 
> output, print, and message cells, which goes a long way toward what 
> you want.  Of course, there may be latent kernel state which you'll 
> need to flush.  And the only absolutely sure way of doing that is to 
> quit the kernel.  Evaluation->Quit Kernel->Local will do it, or you 
> can just evaluate
> 
> Quit
> 
> in a new cell.
> 
> Sincerely,
> 
> John Fultz

Thanks much.  

As I'm sure you know, some apps have a Revert command (often in the same 
menu as their Save and Open commands), which generally means "Revert to 
last Saved version" and which can be handy -- but of course this applies 
only to documents, not the app itself; and it can be dangerous in the 
case of apps that periodically do auto-Saves on docs without visible 
indication to the user.

It's always surprised me, frankly, that Mathematica doesn't have a 
built-in "Clean Slate" facility for its kernel that would be equivalent 
to executing a "Quit Kernel, then Restart Kernel" command (although 
there was a third party (?) command or utility with this name in some 
earlier version, was there not?).  Must be somehow hard to do this?