Flavio's functional programming test

fp.js

/*
 * Implement the following classic FP functions using
 * _only_ Array.prototype.{reduce|reduceRight}(). 🤓
 */
const filter = f => xs => xs

const map = f => xs => xs

const every = f => xs => xs

const some = f => xs => xs

const flatMap = f => xs => xs

const find = f => xs => xs

const findIndex = f => xs => xs

const reverse = xs => xs

/*
 * Bonus! 👾
 */
const compose = (...fns) => args => args

const pipe = (...fns) => args => args