uncurry+mixins

uncurrymixins.js

// Loops over the list of functions and call 
// the next with the previous result.
//
// If next is not a function, 
// it's an additional argument to the previous result

const chain = (...fns) => start => fns
        .reduce((res,next) => typeof next == 'function' ?
                next(res) : 
                res(next) 
            ,start);

// https://stackoverflow.com/questions/23482982/how-does-function-bind-bindfunction-call-uncurry
const uncurry = Function.bind.bind(Function.call);

// Split without arg transforms a string to an array
const toArr = uncurry(String.prototype.split);

const toUpperCase = uncurry(String.prototype.toUpperCase);

const join = who => what => who.join(what);

const push = who => what => who.concat(what);

const add = x => x+3;

const mult = x => x*2;

const res = chain(
                    mult,
                    add,
                    toArr,
                    push,
                    'candles',
                    join,
                    ' ',
                    toUpperCase
                )(12);

console.log(res); // 27 CANDLES