http://stackoverflow.com/q/30841898/1903116

gistfile1.txt

var array = ['yshepu', 'mmxhhb', 'qwertz', 'wvlgrs', 'knfght'];
var prefix = 'myPrefix';
var Q = require('q');

function exists(prefix, name) {
    var names = ['myPrefix:mmxhhb', 'myPrefix:knfght'];
    return Q(names.indexOf(prefix + ':' + name) + 1);
}

function getActive(prefix, array) {
    return Q.allSettled(array.map(function (currentItem) {
        return exists(prefix, currentItem);
    }));
};

function processWithReduce(res) {
    return res.reduce(function (result, currentResult, idx) {
        if (currentResult.state === 'fulfilled' && currentResult.value === 0) {
            result.push(array[idx]);
        }
        return result;
    }, []);
}

function processWithFilter(res) {
    return res.filter(function (x) {
        return x.state === "fulfilled" && x.value === 0;
    });
}


getActive(prefix, array).then(processWithReduce).then(console.log);
// [ 'yshepu', 'qwertz', 'wvlgrs' ]

getActive(prefix, array).then(processWithFilter).then(console.log);
// [ { state: 'fulfilled', value: 0 },
//   { state: 'fulfilled', value: 0 },
//   { state: 'fulfilled', value: 0 } ]