Credit where it's due; that sounds like Gary Bernhardt's "functional core, imperative shell": https://www.destroyallsoftware.com/screencasts/catalog/functional-

Credit where it's due; that sounds like Gary Bernhardt's "functional core, imperative shell": https://www.destroyallsoftware.com/screencasts/catalog/functional-core-imperative-shell https://www.destroyallsoftware.com/screencasts/catalog/funct... Previous HN discussion: https://news.ycombinator.com/item?id=18043058 https://news.ycombinator.com/item?id=18043058