Spreadsheet-style dependency tracking

Florian Weimer fw at deneb.enyo.de
Sat Oct 16 23:33:26 CEST 2010

Are there libraries which implement some form of spreadsheet-style
dependency tracking?  The idea is to enable incremental updates to
some fairly convoluted computation.  I hope that a general dependency
tracking framework would avoid making the computation even more
convoluted and difficult to change.

It would also be preferable if the whole dataset would not have to be
kept in memory for the whole computation.  (It's rather smallish,
though, so it wouldn't be impossible to keep it resident, I guess.)

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