Super easy jQuery+KnockoutJS deferred observable w/ajax

deferredObservable.js

function deferredObservable(initialValue, creator){
    if (!creator){
        creator = initialValue;
        initialValue = null;
    }

    if ($.type(creator) === "string") {
        var getUrl = creator;
        creator = function(){ return $.get(getUrl); };
    }

    var observable = ko.observable(initialValue);

    ko.computed(function(){
        creator()
            .done(function(val){
                observable(val);
            });
    });

    return observable;
}

// simple GET request
// var observable = deferredObservable("/service/getData");

// initialize the observable
// var observable = deferredObservable([], "/service/getData");

// a function that returns a deferred, any time dependencies change, a new GET will be made
// var observable = deferredObservable([], function(){ $.get("/service/getData", ko.toJS(otherObservables)); });