https://monsterlessons.com/project/series/funkcionalnyj-javascript-i-ramda
Исходный код и тесты на примере функции where
https://github.com/ramda/ramda/blob/master/source/where.js https://github.com/ramda/ramda/blob/master/test/where.js
https://www.youtube.com/playlist?list=PLrhzvIcii6GMeyUfpn-o5xVCH3_UykrzI