function copy(from, to) {
    for (var attr in to) {
        if (from.hasOwnProperty(attr)) {
            if (!(from[attr] instanceof Array)) {
                to[attr] = from[attr];
            }
        }
    }
}
function updateByNumber(list, from) {
    var result = false;
    var to = Enumerable.from(list).where(function (o) { return o.number === from.number; }).firstOrDefault();
    if (to) {
        copy(from, to);
    }
    else {
        list.push(from);
        result = true;
    }
    return result;
}
function deleteByNumber(list, item) {
    var result = false;
    for (var i = 0; i < list.length; i++) {
        if (list[i].number == item.number) {
            list.splice(i, 1);
            result = true;
            break;
        }
    }
    return result;
}