grabbing a subset of data with backbone collections
<p>I have the following function:</p>

<pre><code>        addBook : function() {
            _authors = new Array();
            authors = $("#id_authors").val().split(",");
            for (var i=0;i&lt;authors.length;i++) {
                var firstname = authors[i].split(" ")[0];
                var lastname = $.trim(authors[i].replace(firstname,""));

                _authors.push({"firstname": firstname, "lastname": lastname});
            }
            this.authors.fetch({data: _authors});

            console.log(this.authors);
            return false;
        }
</code></pre>

<p>The value in #id_authors is Leo Tolstoy,Richard Pevear,Larissa Volokhonsky. I would like to loop through these and grab the author information for only these authors.</p>

<p>What is happening is it's grabbing the first 20 authors (which don't happen to be these authors). How do I use the collection to grab only the 3 authors that were specified? </p>
