A generic iterator function, which can be used to seamlessly iterate over both objects and arrays. This function is not the same as $().each() - which is used to iterate, exclusively, over a jQuery object. This function can be used to iterate over anything. The callback has two arguments:the key (objects) or index (arrays) as first the first, and the value as the second. The object, or array, to iterate over. The function that will be executed on every object. This is an example of iterating over the items in an array, accessing both the current item and its index. $.each( [0,1,2], function(i, n){ alert( "Item #" + i + ": " + n ); }); This is an example of iterating over the properties in an Object, accessing both the current item and its key. $.each( { name: "John", lang: "JS" }, function(i, n){ alert( "Name: " + i + ", Value: " + n ); });