title: Remove last model in Backbone Collection
body: <p>How do you remove the last model in a Collection?</p>
  
  <pre><code>      if (this.Collection.models.length &lt; newValue) {
          console.log('adding');
          this.Collection.models.add();
        } else {
          console.log('removing');
          // this isnt working, by selecting it by the current collection array index
          // basically this.Collection.remove([this.Collection.models.length-1])
          //this.measuresCollection.models.get('beats').remove(this.measuresCollection.models[i].get('beats')[this.measuresCollection.models[i].get('beats').length]);
        }
  </code></pre>
  
  <p>I don't know the id, so I would just like to remove the last one.</p>