Dear Forum,
On Wed, Oct 08, 2014 at 09:02:54PM -0400, Tim Kohl wrote:
> You can create GAP scripts, the convention being to call such a script
> myprogram.g for example and
> be sure to include the command
>
> quit;
>
> as the last line,
> and with this you can do something like
>
> gap < myprogram.g
>
> which will allow you to see the script run ( and to see if it got stuck at an
> error ) or if your sure of the correctness just do
>
> gap < myprogram.g > myprogram.out
>
> where the .out file has the output.
This is essentially what I would do, as well as having
LogTo("myprogram.log");
as the first line of myprogram.g
in order for myprogram.log to be a log-file showing the
GAP input followed by its corresponding output,
in the order executed.
Leonard
>
> -Tim K.
>
> Sent from my iPhone
>
> > On Oct 8, 2014, at 7:02 PM, Douglas Wilson <douglaspardoewil...@gmail.com>
> > wrote:
> >
> > I've been using Python, and therefore have
> > access to Sage, which includes an interface
> > to GAP. So I can write a Python program
> > that, via Sage, will let me evaluate an
> > expression using GAP.
> >
> > That seems a very round-about way of
> > using GAP, and is limited to single
> > expressions. What I'd really like to do is
> > run a GAP language program from the
> > command line. I can pass a saved workspace
> > to GAP on the command line, which will
> > be used in the subsequent interactive session,
> > but that is not the same thing.
> >
> > I realize that the GAP is oriented towards
> > interactive sessions in a workspace, but surely
> > there are ways around that. For example,
> > Smalltalk used to be the same way, but
> > GNU Smalltalk will allow you to specify
> > a program from the command line, which
> > it will then run and exit.
> >
> > One motive for asking this is straightforward.
> > For me, hi-tech means making the best use
> > of the underlying science. Modern computer
> > hardware uses a lot of technology based on
> > physics, and is therefore hi-tech. Almost
> > all modern computer software makes little
> > use at all of mathematics, and therefore is
> > actually quite lo-tech, however sophisticated
> > it may seem to the user.
> >
> > The future of software, in my opinion will
> > inevitably involve more and more use of
> > mathematics. For that purpose, there should
> > be a highly mathematical computer
> > programming language. And behold,
> > there is: the GAP language. Except
> > for the ability to create Graphical User
> > Interfaces, it is functionally complete
> > and can do anything more ordinary
> > languages can. That single deficiency
> > could be remedied easily be interfacing
> > with a simple windowing system, like Tk,
> > as Python does. I'm not much interested
> > in writing GUI programs myself, just
> > ones to work from the command line.
> >
> > My own work is actually quite mathematical,
> > and I would like to be able to do things
> > like specifying a group by a presentation,
> > identifying it, and working with it in the
> > usual way. But I don't want to do it
> > interactively, nor do I want to be loading
> > up saved workspaces all the time. I just
> > want to use the GAP language like any
> > other one.
> >
> > Perhaps this capability already exists.
> > If so, I can fine no documentation of it
> > in the reference manual. Perhaps you
> > could point me to some. If it doesn't
> > exist yet, could it be provided somehow?
> >
> > dpw
> >
> > http://DouglasPardoeWilson.SocialTechnology.ca/
> > _______________________________________________
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>
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