Nullable

What

A tiny javascript wrapper the result which may be undefined or null

Why

we have lots of boilerplate code to handle empty value

doAsync(function(result) {
    // if result is empty then crap....
    result.forEach(function() {
    });
});

so we can do this
doAsync(function(result) {
    var result = Nullable(result).def([]).val;
    // if result is empty, then nothing happened
    result.forEach(function(item) {
    });
});