Spreadsheet-like programming in Haskell

What if I told you that a spreadsheet could be a library instead of an application? What would that even mean? How do we distill the logic behind spreadsheets into a reusable abstraction? My mvc-updates library answers this question by bringing spreadsheet-like programming to Haskell using an intuitive Applicative interface. The central abstraction is an Applicative Updatable value, which is just

[ruicc]

mvc-updates package

[tmatsuu]

なるほどわからん