https://github.com/leonardomso/33-js-concepts HOF javascript-higher-order-functions-a-complete-guide higher-order-functions-composing-software Higher Order Functions (Composing Software) https://www.airpair.com/javascript/posts/mastering-es6-higher-order-functions-for-arrays https://www.freecodecamp.org/news/higher-order-functions-in-javascript/