如何通过数字值对javascript中的对象进行排序

Question

I am trying to sort an object so that the property with the most votes comes first. Here's my data structure

I have found some articles on how to do this and I have created a new array and am pushing the votes value into it as well as the player object. The problem I am having is then sorting the options by the number, and removing the votes count from the array. Here's my code

    var sortedOptions = [];
    for (let option of options) {
        sortedOptions.push(option, option.votes);
    }

    sortedOptions.sort(function(a, b) {

    })

I have been following this but I don't understand how the sort function is working and how to do it for my purposes.

Thanks for your help :)

EDIT: I tried doing the following code, however this was returning an object with 8 options and the object isn't sorted

    sortedOptions.sort(function(a, b) {
        return a.votes - b.votes;
    })

Resulted in

Answer 1

You can use Array.prototype.sort()

The sort function takes a function as an argument, which compares two elements of the array to determine which one should be sorted where.

For your case where you want to sort based on votes you write it like so:

options.sort(function(a, b) {
    // use b - a to sort descending, a - b to sort ascending
    return b.votes - a.votes;
})

The for-loop you are using is strange: it produces an array which is mixed of objects and numbers, that's why the sort function doesn't work on it. Either sort on options directly, or if you need a copy use let sortedOptions = JSON.parse(JSON.stringify(options));