查找所有具有匹配ID javascript的对象 [英] Find all objects with matching Ids javascript

问题描述

我正在尝试从我的学生数组中获取所有具有匹配ID的对象，并从中获取其他属性值...

I'm trying to get all objects with matching id's from my students array and get other property values from them...

例如，我的数组如下所示:

For instance my array looks like this:

const students = [
    {id: 1, name: 'Cal', location: 'McHale' },
    {id: 2, name: 'Courtney', location: 'Sydney Hall' }, 
    {id: 1, name: 'Cal', location: 'Syndey hall' }
]

所以我的预期输出将获取所有id实例:1.

So my expected output would grab all instances of id: 1.

{id: 1, name: 'Cal', location: 'McHale' },
{id: 1, name: 'Cal', location: 'Syndey hall' }

我最终想要删除重复的名称，并显示在这样的列表中……(但这很重要.现在，我只想获取匹配的对象).

I'll eventually want to remove duplicate names and display in a list like so... (But that's down the line. For now I just want to grab matching objects).

Id: 1    Name: Cal    Location: McHale
                                Syndey Hall

我尝试过:

const result = _.find(students, {student_id: studentId});

但这似乎不起作用，它只是返回具有该ID的对象之一.

But that doesn't seem to work, it just returns one of the objects with that id..

{id: 1, name: 'Cal', location: 'McHale' },

我该如何进行这项工作?

How can I make this work?

推荐答案

我会研究

I would look into the filter function. It's build into JavaScript.

这是它如何工作的一个例子.您需要做的就是找到一种方法来创建一个函数，该函数将告诉它是否具有正确的ID.

Here's an example of how it works. All you need to do is find a way to make a function that will tell if it has the proper id.

function isBigEnough(value) {
  return value >= 10;
}
var filtered = [12, 5, 8, 130, 44].filter(isBigEnough);
// filtered is [12, 130, 44]

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