Order array of objects by custom field, then alphabetically

Question

I have an array of objects, each object has 2 values, priority and name.

var people = [
        {
            "name" : "Jim",
            "priority" : "Low"
        },
        {
            "name" : "Gary",
            "priority" : "Medium"
        },
        {
            "name" : "Andrew",
            "priority" : "Medium"
        },
        {
            "name" : "Bill",
            "priority" : "High"
        },
        {
            "name" : "Edward",
            "priority" : "Medium"
        }
    ]

I would like to sort this array, ordering by priority High to Low, and then within each priority, by name alphabetically.

Ordering alphabetically is easy enough:

people = _.orderBy(people, 'name');

But how would I sort by priority in the way I want?

This might help you https://stackoverflow.com/questions/2784230/how-do-you-sort-an-array-on-multiple-columns — Tech Yogesh, Oct 17 '18 at 08:49
You can use ``_.orderBy`` to have multiple sorting options. Like example provided on lodash document. https://lodash.com/docs/4.17.10#orderBy — Sandip Nirmal, Oct 17 '18 at 08:49

Nikhil Aggarwal · Accepted Answer · 2018-10-17T08:52:31.343

5

You need to create a map for specifying the order of priorities and then can use Array.sort like following

let priorityMap = {"High" : 3,"Medium" : 2,"Low" : 1};
let people = [{"name":"Jim","priority":"Low"},{"name":"Gary","priority":"Medium"},{"name":"Andrew","priority":"Medium"},{"name":"Bill","priority":"High"},{"name":"Edward","priority":"Medium"}];
people.sort((a,b) => priorityMap[b.priority] - priorityMap[a.priority] || a.name.localeCompare(b.name));
console.log(people);

edited Oct 17 '18 at 08:52

answered Oct 17 '18 at 08:51

Nikhil Aggarwal

28,197
4
43
59

1

Ah yes, seems so simple once it's explained, thanks! – Daft Oct 17 '18 at 08:51
@Daft - Glad to help you! – Nikhil Aggarwal Oct 17 '18 at 08:54
@NikhilAggarwal I am glad my answer was very close to yours :) – Nitish Narang Oct 17 '18 at 08:58
@NitishNarang - Glad to see your answer too mate :) – Nikhil Aggarwal Oct 17 '18 at 08:58

score 2 · Answer 2 · answered Oct 17 '18 at 08:52

This can be achieved via "sort" as below.

var people = [
        {
            "name" : "Jim",
            "priority" : "Low"
        },
        {
            "name" : "Gary",
            "priority" : "Medium"
        },
        {
            "name" : "Andrew",
            "priority" : "Medium"
        },
        {
            "name" : "Bill",
            "priority" : "High"
        },
        {
            "name" : "Edward",
            "priority" : "Medium"
        }
    ]
let priority = {"High": 0, "Medium": 1, "Low": 2}
people.sort((a,b) => priority[a.priority] - priority[b.priority] || a.name.localeCompare(b.name))

Yes I see now. This happens when we proceed on similar lines of thought :) — Nitish Narang, Oct 17 '18 at 08:55

Order array of objects by custom field, then alphabetically

2 Answers2