Maps a function that returns a promise and then passes that array of promises to Q.all so they are all processed. Uses Fn.js and Q. Example included

mapAll.js

"use strict";
const Q = require('q');
const fn = require('fn.js');

// Maps a function that returns a promise and then passes that array of promises to Q.all so they are all processed
const mapAll = fn.curry(fn.compose(Q.all, fn.map), 2);

// Returns a promise
function returnPromise(something) {
    return Q().then(() => something);
}

const somethings = [1, 2, 3];

// Example of use
Q()
    .then(function() {
        return somethings;
    })
    .then(mapAll(returnPromise))
    .then(function(result) {
        console.log(result)
    })