API methods
- attachEvent - attaches handler for a custom event.
- clearAll - clears a dataset.
- copy - creates a copy of the item.
- dataCount - returns size of a dataset.
- detachEvent - detaches handler from a custom event.
- exists - checks if an item with the defined id exists.
- filter - filters a dataset.
- first - gets ID of the first item.
- idByIndex - returns an item's ID by the index.
- indexById - returns an item's index by the ID.
- item - returns hash of data related to the specific item.
- last - gets ID of the last item.
- load - adds data from an external URL.
- next - gets the next ID.
- parse - adds data from a string or an object.
- previous - gets the previous ID.
- remove - removes item by the ID.
- set - associates hash of data with ID.
- sort - sorts a dataset.