docs : `parseFloat` to sorting docs

_posts/docs/2010-12-07-sorting.mdown

@@ -66,7 +66,7 @@ $('#container').isotope({
 {% endhighlight %}
 
 
-For numerical data, we can convert a text value into a number via `parseInt()` function.
+For numerical data, we can convert a text value into a number with `parseInt()` or `parseFloat()`.
 
 {% highlight javascript %}
 
@@ -76,7 +76,7 @@ getSortData : {
     return parseInt( $elem.find('.name').text(), 10 );
   },
   weight : function ( $elem ) {
-    return parseInt( $elem.find('.weight').text(), 10 );
+    return parseFloat( $elem.find('.weight').text() );
   }
 }