Q.All sample

by yoorek

HTML

<script src="//cdnjs.cloudflare.com/ajax/libs/q.js/1.0.0/q.min.js"></script>

JavaScript

var log = {
    info: function (message) {
        div = document.createElement("div");
        div.innerHTML = message;
        document.body.appendChild(div);
    }
};

function run(number) {
    var deferred = Q.defer();

    if (number % 2) {
        deferred.reject(new Error('Error for ' + number));
    } else {
        deferred.resolve(number);
    }

    return deferred.promise;
}

var promises = [], data = [1, 2, 3, 4, 5];

data.forEach(function (item) {
    var promise;
    
    promise = run(item)
        .then(function (result) {
            log.info('Success : ' + result);
        })
        .catch (function (error) {
            log.info('Error Handler in loop ' + error.message);
        });

    promises.push(promise);
});

Q.all(promises)
    .then(function () {
        log.info('All Success');
    })
    .catch (function (error) {
        log.info('Error handler for All ' + error.message);
    });