JavaScript-関数の組み合わせ

const _ = require("lodash");

const reverse = arr => arr.reverse()
const first = arr => arr[0]
const toUpper = s => s.toUpperCase()
  
const lastToupper = _.flowRight(toUpper, first, reverse) 

console.log(lastToupper(['one', 'two', 'three']))
  
//    lodash    flowRight
function compose (...args) {
  return function (value) {
    return args.reverse().reduce(function (acc, fn) {
        console.log(fn)
      return fn(acc)
    }, value)
  }
}
const composeEs6 = (...args) => value => args.reverse().reduce((acc, fn) => fn(acc), value)
const f = composeEs6(toUpper, first, reverse)
console.log(f(['one', 'two', 'three']))
//