javascript - Lodash从数组中删除重复项(Lodash remove duplicates from array)

Question

This is my data:

(这是我的数据：)

[
    {
        url: 'www.example.com/hello',
        id: "22"    
    },
    {
        url: 'www.example.com/hello',
        id: "22"    
    },
    {
        url: 'www.example.com/hello-how-are-you',
        id: "23"    
    },
    {
        url: 'www.example.com/i-like-cats',
        id: "24"    
    },
    {
        url: 'www.example.com/i-like-pie',
        id: "25"    
    }
]

With Lodash, how could I remove objects with duplicate id keys?

(使用Lodash，如何删除具有重复ID键的对象？)

Something with filter, map and unique, but not quite sure.

(带有过滤器，地图和独特内容的东西，但不是很确定。)

My real data set is much larger and has more keys, but the concept should be the same.

(我的真实数据集更大，并且具有更多的键，但是概念应该相同。)

  ask by ChrisRich translate from so

Answer 1

_.unique no longer work for the current version as lodash 4.0.0 has this breaking change .

(_.unique用于当前版本，因为lodash 4.0.0具有此重大更改 。)

The functionally was splitted into _.uniq, _.sortedUniq, _.sortedUniqBy, & _.uniqBy

(在功能上分为_.uniq，_。sortedUniq，_。sortedUniqBy和_.uniqBy)

You could use _.uniqBy either by

(您可以通过_.uniqBy方式使用_.uniqBy)

_.uniqBy(data, function (e) {
  return e.id;
});

or

(要么)

_.uniqBy(data, 'id');

Documentation: https://lodash.com/docs#uniqBy

(文档： https : //lodash.com/docs#uniqBy)

---

For older versions of lodash( < 4.0.0 )

(对于lodash的旧版本（<4.0.0）)

Assuming that the data should be unique by id and your data is stored in data variable, you can use unique() function like this:

(假设数据应按id唯一，并且您的数据存储在data变量中，则可以使用unique（）函数，如下所示：)

_.unique(data, function (e) {
  return e.id;
});

Or simply

(或者简单地)

_.uniq(data, 'id');