CancellablePromise.all.js

CancellablePromise.all = function (values) {
    var CancellablePromise = this;
    var child;
    var children = [];

    return new CancellablePromise(function (resolve, reject) {
        if (!A.Lang.isArray(values)) {
            reject(new TypeError('CancellablePromise.all expects an array of values or promises'));
            return;
        }

        var remaining = values.length,
            i         = 0,
            length    = values.length,
            results   = [];

        function oneDone(index) {
            return function (value) {
                results[index] = value;

                remaining--;

                if (!remaining) {
                    resolve(results);
                }
            };
        }

        if (length < 1) {
            return resolve(results);
        }

        for (; i < length; i++) {
            child = CancellablePromise.resolve(values[i]);
            child.then(oneDone(i), reject);
            children.push(child);
        }
    }, function () {
        children.forEach(function (child) {
            child.cancel();
        });
    }).then(function(result) {
        console.log('CancellablePromise resolved');
        return result;
    },
    function(reason) {
        console.log('CancellablePromise rejected', children);
        throw reason;
    });
};