AngularJS ephemeral caching. Consider a list of links containing which represent folders. Just like an email client, the user will browser between folders. ng-clicks will trigger switchFolder

cached.js

    $scope.switchFolder = function(attrs) {
        
        // Results found on the last query will be available instantly (if any)
        // you could also add a Message.is_query_cached to check if there are cached results
        $scope.messages = Message.query_cached({ id: attr.some_id});

        // Lets find the actual results, which can take longer
        var messages = Message.query({ id: attr.some_id}, function () {
            $scope.messages =  message;
        });
        
    }
    

non_cached.js

    $scope.switchFolder = function(attrs) {
        // You would usually do this, but it can break UX sometimes
        $scope.messages = Message.query({id: attrs.some_id});
        
    }
    
    $scope.switchFolderBlocking = function(attrs) {
        // This way the user will still have the current data while you are grabbing more
        var messages = Message.query({id: attrs.some_id}, function () {
            $scope.messages =  message;
        });
        
    }