Different compose utility methods

compose.js

// Simple composing (ES6)
// Belongs to Stefan A. Maric
const compose = (...fns) => x => fns.reduceRight((v, f) => f(v), x);

/*****************************/

// Recursive composing
// Belongs to Stefan A. Maric
const compose = (head, ...rest) => x => head ? head(compose(...rest)(x)) : x;

/****************************/

// Showing the compose function in a more pedagogical way
const compose = function (...fns) {
    return function(init) {
        return fns.reduceRight(function(accumulator, func) {
            return func(accumulator);
        }, init);
    }
}