Backbone tag collection filtering with levenshtein

filtering.js

var Tags = Backbone.Collection.extend({
    suggest: function(suggestion, threshold) {
        return this.filter(function(tag) {
            return levenshtein(tag.get('name'), suggestion) < (threshold || 3);
        })
    }
});

var tags = new Tags([
    {name: 'Cat'},
    {name: 'Dog'},
    {name: 'Whale'},
    {name: 'Horse'},
    {name: 'Seahorse'}
)];

var filtered = tags.suggest('hrose') // => [horse, seahorse ]
this.list.render(filtered);