{"action":"opened","issue":{"url":"https://api.github.com/repos/Mooophy/Cpp-Primer/issues/355","labels_url":"https://api.github.com/repos/Mooophy/Cpp-Primer/issues/355/labels{/name}","comments_url":"https://api.github.com/repos/Mooophy/Cpp-Primer/issues/355/comments","events_url":"https://api.github.com/repos/Mooophy/Cpp-Primer/issues/355/events","html_url":"https://github.com/Mooophy/Cpp-Primer/issues/355","id":115514027,"number":355,"title":"a quesion from the book (5th )","user":{"login":"RanchoCooper","id":15610629,"avatar_url":"https://avatars.githubusercontent.com/u/15610629?v=3","gravatar_id":"","url":"https://api.github.com/users/RanchoCooper","html_url":"https://github.com/RanchoCooper","followers_url":"https://api.github.com/users/RanchoCooper/followers","following_url":"https://api.github.com/users/RanchoCooper/following{/other_user}","gists_url":"https://api.github.com/users/RanchoCooper/gists{/gist_id}","starred_url":"https://api.github.com/users/RanchoCooper/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/RanchoCooper/subscriptions","organizations_url":"https://api.github.com/users/RanchoCooper/orgs","repos_url":"https://api.github.com/users/RanchoCooper/repos","events_url":"https://api.github.com/users/RanchoCooper/events{/privacy}","received_events_url":"https://api.github.com/users/RanchoCooper/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":0,"created_at":"2015-11-06T14:26:40Z","updated_at":"2015-11-06T14:26:40Z","closed_at":null,"body":"in page 490, the function query :\r\n```cpp\r\nif (loc == wm.end)\r\n    ...\r\nelse\r\n    return QueryResult(sought, loc->second, file);\r\n```\r\n\r\nwhat's the \"loc->second\" ???"}}