javascript - 基于ID的JavaScript过滤器数据

我有一个包含这些数据的对象。

 {id: 1864,
 courseContentId: 481,
 fileName: GymMembership.jpg
 }
 {id: 1865,
 courseContentId: 481,
 fileName: Field.jpg
 }
 {id: 1866,
 courseContentId: 482,
 fileName: Track.jpg
 }

我想通过创建一个新对象在基于courseContentId的视图上分别显示它们，这是我想要的输出。

 {id: 1864,
 courseContentId: 481,
 fileName: GymMembership.jpg
 }
 {id: 1865,
 courseContentId: 481,
 fileName: Field.jpg
 }

 {id: 1866,
 courseContentId: 482,
 fileName: Track.jpg
 }

哪种javascript函数适用于此？

最佳答案

只需使用_.GroupBy，而不是应用多个过滤器。

courses = [{id: 1864,
 courseContentId: 481,
 fileName: 'GymMembership.jpg'
 },
 {id: 1865,
 courseContentId: 481,
 fileName: 'Field.jpg'
 },
 {id: 1866,
 courseContentId: 482,
 fileName: 'Track.jpg'
 }]

var grouped = _.groupBy(courses, function(course) {
  return course.courseContentId;
});
console.log("Grouped")
console.log(grouped);
console.log("Filter by 481")
console.log(grouped["481"]);
console.log("Filter by 482")
console.log(grouped["482"]);

<script src="https://cdn.jsdelivr.net/lodash/4.17.2/lodash.min.js"></script>