Or if you're into MooTools checkout http://github.com/ShiftSpace/functools http://github.com/ShiftSpace/functools for decorators, pre & postconditions, memoize,

Or if you're into MooTools checkout http://github.com/ShiftSpace/functools http://github.com/ShiftSpace/functools for decorators, pre & postconditions, memoize, arrays and hashes as functions, currying any function parameter, function composition, arity dispatch, etc. Check out http://github.com/ShiftSpace/promises http://github.com/ShiftSpace/promises for bringing functional sanity to AJAX requests as well support for lazy values: function example() { var remotes = ['a', 'b', 'c', 'd', 'e', 'f']; var result = ""; while(remotev = remotes.shift()) { result = add(result, get(remotev)); // get is an async request! ;) } show(result); // -> console.logs "abcdef" } No callbacks, your code looks like (and _is_) regular javascript even though this triggers 6 requests. AJAX callback code is the new spaghetti and this is an antidote. And finally a http://github.com/ShiftSpace/set http://github.com/ShiftSpace/set for a Set datastructure :)