Free software1 sections · 2 min readBy Dezső Mező.mdFree softwareNumina
Numina is a reactive spreadsheet engine built around a pure formula language that tokenizes, Pratt-parses, and evaluates expressions with cell references, ranges, and functions like SUM, AVG, MIN, and MAX. The interesting part is the Sheet that resolves formulas recursively, which gives you dependency-ordered recalculation and cycle detection for free. It is a from-scratch, dependency-light build with no DOM coupling that you can download and run locally.
01About the app
A reactive dependency engine
What to take away
- A pure formula language (tokenize → Pratt parse → evaluate; refs, ranges, SUM/AVG/MIN/MAX) plus a Sheet that resolves recursively - dependency-ordered recalc + cycle detection for free. 11 tests, no DOM.
- Download: Numina (ZIP)
Terms used in this piece
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