Is there an better way to sort an object via its properties?-CodePudding

TL;DR

How can I (better) sort an object's properties?

I am not trying to [sort an] object property by values nor its keys.

Issue

I have an object (like the one below) where I need to move properties (key/value pairs) to the beginning of said object.

// Pre-sorted! But can be in any arrangement due to a hidden `channel.live` property
// name: date
{
    // beginning
    "channel-1": "2022-06-29T11:20:14.000Z",
    "channel-2": "2022-06-29T05:58:18.000Z",
    "channel-3": "2022-06-29T05:18:49.000Z",
    "channel-4": "2022-06-29T04:08:35.000Z",
    "channel-5": "2022-06-29T01:52:31.000Z",
    "channel-6": "2022-06-29T01:00:40.000Z",
    "channel-7": "2022-06-29T00:59:47.000Z",
    "channel-8": "2022-06-29T00:07:28.000Z",
    "channel-9": "2022-06-28T23:55:27.000Z",
    // end
}

Tried Solution(s)

The current solution is to delete every other property and re-add them (putting them at the end).

E.g. If I delete channel-5 and re-add it, the object will be stringified (via JSON.stringify) as {"channel-1":"..." ··· "channel-9":"...","channel-5":"..."}, effectively moving the property to the end.

// Prioritize live channels!
// This will move a channel that isn't live to the end of the `Channels` object
if(!channel.live) {
    delete Channels[name];

    Channels[name] = date.toJSON();
}

CodePudding user response：

As you have requirement to delete and add channels as per your conditions i have mention one method to achieve your requirement it should works for you.

let Channels = {
    "channel-1": "2022-06-29T11:20:14.000Z",
    "channel-2": "2022-06-29T05:58:18.000Z",
    "channel-3": "2022-06-29T05:18:49.000Z",
    "channel-4": "2022-06-29T04:08:35.000Z",
    "channel-5": "2022-06-29T01:52:31.000Z",
    "channel-6": "2022-06-29T01:00:40.000Z",
    "channel-7": "2022-06-29T00:59:47.000Z",
    "channel-8": "2022-06-29T00:07:28.000Z",
    "channel-9": "2022-06-28T23:55:27.000Z",
}

if(!channel.live) {
  delete Channels[name];
  Channels[name] = date.toJSON();
}

if(channel.live)
  Channels = { [name]: time.toJSON(), ...Channels };
}

const updatedChannels = {};
Object.keys(Channels).sort().forEach(item => (updatedChannels[item] = Channels[item]));

Channels = updatedChannels;

CodePudding user response：

Copy the darn object...

// Prioritize live channels!
// This will move a channel that is live to the beginning of the `Channels` object
if(channel.live) {
    // Ensures `...Channels` doees NOT overwrite the new property
    delete Channels[name];

    Channels = { [name]: time.toJSON(), ...Channels };
}