Hacker News Reader

Python’s pandas. Or Apache Arrow (more data structure, but with some calc capabilities). Granted, they’re not spreadsheets per se. Rather, they’re dataframe-centric programming.

View on HN

Not really what I mean. Spreadsheet implements a generic formula evaluation engine that triggers updates on value changes efficiently.

if you need only an engine which does formula evaluation and update of dependency when a value changes, it doesn't look that hard to implement.

Reply on news.ycombinator.com