JS interview in 2 minutes / Higher Order Functions

function higherFunction() {  return function regularFunction() {    console.log('Hello world!')  }}const a = higherFunction() // won't print anythinga() // Hello world!

const a = () => () => () => () => console.log('Hello world')const b = a()const c = b()const d = c()d() // Hello world!

const pipe = (...args) =>   (init) =>     args.reduce((acc, cur) => cur(acc), init)const a = pipe( (val) => val + 1, (val) => val * 2, (val) => console.log("Got", val),)a(10) // Got 22

const logDecorator = (wrapped) => {  return (...args) => {    console.log(`Invoked ${wrapped.name} with args ${args}`)    wrapped(...args)  }}const tmp = (param) => {  console.log('Do nothing, but just show param:', param) }const wrappedTmp = logDecorator(tmp)wrappedTmp('Hello world!')// Invoked tmp with args Hello world!// Do nothing, but just show param: Hello world!

// These functions can by provided by a library itselfconst uppercase = (a) => a.toUpperCase();const removePunctuation = (a) => a.replace(/[^0-9a-zA-Z ]/g, '')// pipe is a Higher Order Function that returns a function, which will apply all functions one by oneconst process = pipe(  uppercase,  removePunctuation,)console.log(process('qwe-qwe'), process('Hello world!'))// QWEQWE HELLO WORLD