angularjs: $timeout usage (inside of service) - angularjs

Question

I'm trying to make a little notifier, that informs about typical situations: need authorization, changes saved etc. Notices are shown for 3 seconds and disappear, if user didn't click on it (if notice clicked, it disappears immediatly).
Documentation is not very informative.
How should i use $timeout, to call close(); after 3 seconds?
And how can i put a variable (nId) into function? I tried with closure (*function(){return function(){}}*) in default setTimeOut(), but unsuccessfully.
myApp.controller('noticesCtrl',
function noticesCtrl($scope, $rootScope, noticesData){
$rootScope.notices = [];
$scope.closeNotice = function(nId){
noticesData.close(nId);
};
});
myApp.factory('noticesData', function($rootScope, $timeout){
return{
add: function(type, text){
var nId = $rootScope.notices.length + 1;
$rootScope.notices.push({id: nId, type:type, text:text+nId});
// call close function with 3sec. delay; how?
},
close: function(nId){
angular.forEach($rootScope.notices, function(notice, key){
if(notice.id == nId){
$rootScope.notices.splice(key,1);
}
});
}
}
});

Answer 1

myApp.factory('noticesData', function($rootScope, $timeout){
var obj = {};
obj.add = function(type, text){
var nId = $rootScope.notices.length + 1;
$rootScope.notices.push({id: nId, type:type, text:text+nId});
$timeout(function(){
obj.close(nId);
},3000);
}
obj.close = function(nId){
angular.forEach($rootScope.notices, function(notice, key){
if(notice.id == nId){
$rootScope.notices.splice(key,1);
}
});
}
return obj;
});

Answer 2

Heres how to do it
$timeout(function () {
// do something
}, 50);