{"action":"created","issue":{"url":"https://api.github.com/repos/Polymer/polymer/issues/2412","labels_url":"https://api.github.com/repos/Polymer/polymer/issues/2412/labels{/name}","comments_url":"https://api.github.com/repos/Polymer/polymer/issues/2412/comments","events_url":"https://api.github.com/repos/Polymer/polymer/issues/2412/events","html_url":"https://github.com/Polymer/polymer/issues/2412","id":104962475,"number":2412,"title":"{{test(t1, t2)}}","user":{"login":"gertcuykens","id":863731,"avatar_url":"https://avatars.githubusercontent.com/u/863731?v=3","gravatar_id":"","url":"https://api.github.com/users/gertcuykens","html_url":"https://github.com/gertcuykens","followers_url":"https://api.github.com/users/gertcuykens/followers","following_url":"https://api.github.com/users/gertcuykens/following{/other_user}","gists_url":"https://api.github.com/users/gertcuykens/gists{/gist_id}","starred_url":"https://api.github.com/users/gertcuykens/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/gertcuykens/subscriptions","organizations_url":"https://api.github.com/users/gertcuykens/orgs","repos_url":"https://api.github.com/users/gertcuykens/repos","events_url":"https://api.github.com/users/gertcuykens/events{/privacy}","received_events_url":"https://api.github.com/users/gertcuykens/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":4,"created_at":"2015-09-04T20:12:18Z","updated_at":"2015-09-04T21:25:59Z","closed_at":null,"body":"For me it would make more sense to only call the function test if both t1 and t2 are changed.\r\n\r\n```js \r\nthis.t1 = 't'\r\nthis.t2 = 't' <- now test gets triggert because both t1 and t2 are changed.\r\n```\r\n\r\nWil prevent prevent side effects where one variable is not yet set when test is triggert."},"comment":{"url":"https://api.github.com/repos/Polymer/polymer/issues/comments/137856948","html_url":"https://github.com/Polymer/polymer/issues/2412#issuecomment-137856948","issue_url":"https://api.github.com/repos/Polymer/polymer/issues/2412","id":137856948,"user":{"login":"gertcuykens","id":863731,"avatar_url":"https://avatars.githubusercontent.com/u/863731?v=3","gravatar_id":"","url":"https://api.github.com/users/gertcuykens","html_url":"https://github.com/gertcuykens","followers_url":"https://api.github.com/users/gertcuykens/followers","following_url":"https://api.github.com/users/gertcuykens/following{/other_user}","gists_url":"https://api.github.com/users/gertcuykens/gists{/gist_id}","starred_url":"https://api.github.com/users/gertcuykens/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/gertcuykens/subscriptions","organizations_url":"https://api.github.com/users/gertcuykens/orgs","repos_url":"https://api.github.com/users/gertcuykens/repos","events_url":"https://api.github.com/users/gertcuykens/events{/privacy}","received_events_url":"https://api.github.com/users/gertcuykens/received_events","type":"User","site_admin":false},"created_at":"2015-09-04T21:25:59Z","updated_at":"2015-09-04T21:25:59Z","body":"My solution at the moment is never to use two or more function arguments and just merge them into one argument :) But I garantie you there going to be allot of people not thinking about this stuff and assume it only get called once.\r\n\r\nWhat about a more drastic polymer approach and only make the first argument as observable?"}}