获取数组中对象的对象属性

Question

使用普通的JavaScript，我试图访问属性， theatricalrelease阵列中的所有对象， movies 。

 var movies = [{ "Black Panther" : { "title" : "Black Panther", "theatricalrelease" : "2/16/2018" }, "Infinity War" : { "title" : "Avengers: Infinity War", "theatricalrelease" : "5/4/2018" }, "Captain Marvel" : { "title" : "Captain Marvel", "theatricalrelease" : "TBA" } }]; for (var i = 0; i < movies.length; i++) { console.log(movies[i]); //TRIED for (var property in movies[i]) { if (movies[i].hasOwnProperty(property)) { console.log(property); } } } } 

如您所见，我试图在另一个对象中使用另一个for循环，因为我希望它能遍历对象的索引名称。 相反，logging property为我提供了每个索引的名称。 如何访问每部电影的剧场版？

Answer 1

问题是您在代码底部有一个包含一个对象的数组和一个额外的}括号。 我对您的阵列做了一些更改，以达到您的预期。 现在，这将在您的console.log显示戏剧发行版。

 var movies = [{ "title" : "Black Panther", "theatricalrelease" : "2/16/2018" },{ "title" : "Avengers: Infinity War", "theatricalrelease" : "5/4/2018" },{ "title" : "Captain Marvel", "theatricalrelease" : "TBA" }]; for (var i = 0; i < movies.length; i++) { console.log(movies[i]); console.log('theatrical release', movies[i]['theatricalrelease']) } 

Answer 2

根据您的方法： 仅一个元素 ：

 var movies = [{ "title": "Black Panther", "theatricalrelease": "2/16/2018"}, { "title": "Avengers: Infinity War", "theatricalrelease": "5/4/2018"}, { "title": "Captain Marvel", "theatricalrelease": "TBA"}]; movies.forEach(({theatricalrelease}) => console.log(theatricalrelease)); 

 .as-console-wrapper { max-height: 100% !important; top: 0; }