An enumerable list where each element is also accessible via a key provided by the user.

var dates = new KeyedList({
    birth: 1533,
    coronation: 1558
});

dates.keys(); // -> ['birth', 'coronation']
dates.values(); // -> [1533, 1558]

dates.store('death', 1603);

dates.getNext('coronation'); // -> 1603
dates.getNextKey('coronation'); // -> 'death'

dates.getPrevious('coronation'); // -> 1533
dates.getPreviousKey('coronation'); // -> 'birth'

dates.remove('coronation');

dates.keys(); // -> ['birth', 'death']
dates.values(); // -> [1533, 1603]

This library is built with James Coglan's JS.Class and its API borrows a lot from JS.OrderedHash.