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MathGroup Archive 2006

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Re: Re: How to determine whether a message has been switched

  • To: mathgroup at smc.vnet.net
  • Subject: [mg71506] Re: [mg71502] Re: How to determine whether a message has been switched
  • From: "Chris Chiasson" <chris at chiasson.name>
  • Date: Tue, 21 Nov 2006 07:05:04 -0500 (EST)
  • References: <200611190610.BAA23575@smc.vnet.net> <ejrn2r$98u$1@smc.vnet.net>

I have noticed that sometimes messages are equal to $Off[].

You can see it in the output of Messages[General] from a fresh kernel.
The only thing is, there aren't nearly as many messages in that list
as there are messages defined for General (it seems like some kind of
delayed definition scheme messes up the operation of the Messages
command).

On 11/20/06, David Bailey <dave at remove_thisdbailey.co.uk> wrote:
> Carl Woll wrote:
> > Andrew Moylan wrote:
> >
> >> Hi all,
> >>
> >> When writing algorithms, I sometimes decide to disable a particular
> >> message using the function Off[]. At the end of my routine, I re-enable
> >> the message using the function On[].
> >>
> >> Unfortunantely, if the message in question has already been turned off
> >> (by some other function, for example), then my code will have the
> >> unfortunate side-effect of switching it back on. What I really want is
> >> to disable the message for the duration of my routine, and then set it
> >> back to its original state at the end of my routine.
> >>
> >> Thus: Is there some way to determine whether a message has been
> >> switched Off[] (or On[])?
> >>
> >> Cheers,
> >> Andrew
> >>
> >>
> > Look at the message:
> >
> > Off[General::spell1]
> >
> > In[2]:=
> > General::spell1
> > Out[2]=
> > $Off[Possible spelling error: new symbol name "`1`" is similar to existing \
> > symbol "`2`".]
> >
> > Messages that have been turned off are wrapped in $Off.
> >
> > Carl Woll
> > Wolfram Research
> >
> Carl,
>
> Don't you think information like that should be documented! If you look
> up the symbol $Off, it is there, but with no help information at all!
>
> David Bailey
> http://www.dbaileyconsultancy.co.uk
>
>


-- 
http://chris.chiasson.name/


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