Potentially async function return a promise that immediately resolves?

Question

Where asyncBananaRequest returns a promise -

function potentiallyAsync () {
  if (cachedBanana) {
    return asyncBananaRequest();
  }
  return         


        

Answer 1

Sure! Use a pattern along these lines:

function bananas($q) {
  var def = $q.defer();

  if (cachedBananas) {
    def.resolve(cachedBananas);
  } else {
    asyncBananas('Monkey.co')
    .success(function(bananas) {
      def.resolve(bananas);
    });
  }

  return def.promise;
}

Meanwhile:

function monkey(bananas) {
   bananas.then(function(bananas) {
     bananas.eat(); // Yum!
   });
}