const async = require('async');
const promiseFunction = function (x) {
    if (x) {
        return Promise.resolve(true);
    } else {
        return Promise.reject(false);
    }
};

const asyncFunction = function (x, callback) {
    return promiseFunction(x)
        .then(result => callback(null, result))
        .catch(err => callback(err))
};

async.map(
    [true, false, true],
    asyncCallback,
    (err, result) => console.log(err, result)
);