I think Pivotal (<http://www.cs.kent.ac.uk/projects/pivotal/>) has
the "live update" behavior of spreadsheets.
I haven't played with it yet, but I saw Keith Hanna show off his
earlier Vital system; it even updates "backwards" in some sense; see
the "Direct manipulation" section at his site (<http://
www.cs.kent.ac.uk/projects/pivotal/adt-manip.html>).
Finally, it also does some nice things with graphics, a la Conal's
Pan (and now Eros), probably could do Jerzy/Clastic-type stuff, too.
-- Fritz
On Jan 31, 2007, at 4:06 AM, Bjorn Lisper wrote:
But...suppose we had a spreadsheet a little like Haskell where each
cell has a static type, and the values can be Haskell functions. What
interesting things could we do with it that we couldn't do with
Excel?
I had a MSc student doing something in this direction some years
ago. He
made a Haskell interface which was intended to work like a
spreadsheet. In
this interface, every declaration has a value window (if the entity
declared
has a showable type) and a declaration window. A designated button
triggers
a recompilation, and thus also a recalculation of all declared
values -
this, I think, captures the essence of spreadsheets which is to be
able to
make changes and quickly see the results. In order to support the
kind of
array omputations often done in spreadsheets, an extended array
module was
defined which declares a number of array functions and other
conveniences.
See http://www.mrtc.mdh.se/index.php?choice=projects&id=0041.
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