waterfall.js

const HEAD = 0;

const splitCallback = list => [
    list.slice(0, list.length - 1),
    list[list.length - 1]
];

function next(args, done, ...functions) {
    const fnc = functions[HEAD];
    if (!fnc) done();
    else fnc(...args, err => {
        if (err) done(err);
        else next(args, done, ...functions.slice(1))
    });
}

export const waterfall = (...functions) => (...args) => next(...splitCallback(args),  ...functions);