Simple ES6 compose & pipe function

compose.js

const compose = (...fns) => (...args) => {
  return fns.slice(0, -1).reduceRight((res, fn) => fn(res), 
    fns[fns.length -1].apply(null,args)
  );
};

const pipe = (f1, ...fns) => (...args) => {
  return fns.reduce((res, fn) => fn(res), f1.apply(null,args));
};

// example
const add2        = (n) => n + 2;
const times2      = (n) => n * 2;
const times2add2  = compose(add2, times2);
const add2tiems2  = pipe(add2, times2);
const add6        = compose(add2, add2, add2);

times2add2(2);  // 6
add2tiems2(2);  // 8
add6(2);        // 8

Thanks nice work

You can replace f1.apply(null,args) with f1(...args)