问RSVP.js -数组上的多个异步函数调用

EN

function createItemList(fileList) {
    var promise = new RSVP.Promise(function(resolve, reject) {
        var itemList = [];

        //For each file in fileList, get the directly accessible properties
        //and push it to a new array
        for (var i = 0, file; file = fileList[i]; i++) {
            currentItem.Name = file.Name;
            currentItem.LastModified = new Date(file.TimeLastModified).format("dd-MM-yyyy hh:mm:ss");
            currentItem.Version = file.MajorVersion + "." + file.MinorVersion;

            itemList.push(currentItem);
        }

        //This is where it starts to get messy...
        //I want to map each item in the new itemlist to the corresponding properties
        //in the fileList. If I can include the corresponding file somehow, I could set the
        //data in the method 'getModifiedBy' and similar. I believe this should work,
        //but I have no idea how I can achieve this.
        var modifiedBy = itemList.map(function(item) {
            return getModifiedBy(item, fileList[INDEX]);
        });

        var checkedOutBy = itemList.map(function (item) {
            return getCheckedOutBy(item, fileList[INDEX]);
        });

        var eventDate = itemList.map(function (item) {
            return getEventDate(item, fileList[INDEX]);
        });

        var promises = {
            promisesModifiedBy: modifiedBy,
            promisesCheckedOutBy: checkedOutBy,
            promisesEventDate: eventDate
        };

        RSVP.all(promises)
            .then(function() {
            resolve(itemList);
        });
    });
    return promise;
}