问Angular可重用函数

EN

angular.module("myModule", [])
.factory("MyService", function ($rootScope) {
    return {
        myFunction: function () { // do stuff here }
    }
})
.directive("MyDirective", function (MyService) {
    return {
        link: function (scope, iElement, iAttrs) {
            // try do keep dom modification here, you have access to MyService,
            // let it do the algorithm and try to keep dom modification here.
            // PS: you can also inject $rootScope to directives.
        };
    };
});

var MyDirective = function() {
    var linkFn = function(scope, element, attrs) { 
        callAwesomeFn(scope);
    };

    return {
        link: linkFn
    }
};