ecmascript deferred interface

gistfile1.rb

Deferred(value?, greedy=false)
    .state = "unresolved" | "resolved" | "rejected"
    
    .done(handlerz)
    .fail(handlerz)
    .then(doneHandlerz failHandlerz, progressHandlerz)
    .on  (doneHandlerz, failHandlerz, progressHandlerz)
    
    .resolve   (value)
    .reject    (args...)
    .rejectWith(context, args)
    
    .request()
    .requested(requestedHandlerz)
    
    .get     (propertyName)
    .post    (methodName, args...)
    .postWith(methodName, context, args...)
    .put     (propertyName, value)
    .delete  (propertyName)
    .call    (args...)
    .apply   (newThis, args...)