{"action":"opened","issue":{"url":"https://api.github.com/repos/firebase/angularfire/issues/533","labels_url":"https://api.github.com/repos/firebase/angularfire/issues/533/labels{/name}","comments_url":"https://api.github.com/repos/firebase/angularfire/issues/533/comments","events_url":"https://api.github.com/repos/firebase/angularfire/issues/533/events","html_url":"https://github.com/firebase/angularfire/issues/533","id":54721167,"number":533,"title":"$FirebaseArray.$extendFactory Example in the Manual is wrong","user":{"login":"benjaminsuch","id":706852,"avatar_url":"https://avatars.githubusercontent.com/u/706852?v=3","gravatar_id":"","url":"https://api.github.com/users/benjaminsuch","html_url":"https://github.com/benjaminsuch","followers_url":"https://api.github.com/users/benjaminsuch/followers","following_url":"https://api.github.com/users/benjaminsuch/following{/other_user}","gists_url":"https://api.github.com/users/benjaminsuch/gists{/gist_id}","starred_url":"https://api.github.com/users/benjaminsuch/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/benjaminsuch/subscriptions","organizations_url":"https://api.github.com/users/benjaminsuch/orgs","repos_url":"https://api.github.com/users/benjaminsuch/repos","events_url":"https://api.github.com/users/benjaminsuch/events{/privacy}","received_events_url":"https://api.github.com/users/benjaminsuch/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":0,"created_at":"2015-01-19T02:44:42Z","updated_at":"2015-01-19T02:44:42Z","closed_at":null,"body":"Hello,\r\n\r\nam I wrong or is there a mistake in the Example code at: https://www.firebase.com/docs/web/libraries/angular/api.html#angularfire-extending-the-factories-firebasearrayextendfactory\r\n\r\nI used the example code and its working fine, except, that `console.log(this._list)` returns `undefined` (I put `console.log(this._list)` right after `var total = 0`). When I use `this` instead of `this._list` I'm not able to find `_list`\r\n\r\n"}}