CODEWITHSUNDEEP
javascriptsortingobjectunderscore.js
Cuberic
Cuberic

Reputation: 187

sortBy keeping key name

I'm trying to sort an object but can't seem to keep the key name of each object after sorting.

Here is the sample json I'm sorting on 

series_data: {
embeded: {
    objectNameA: {
        item: {
        last:{reportdate:2014-10-05, trend:=, change:0, value:0},…},
        first: {reportdate:2013-01-06, trend:?, change:null, value:0},
        high: 1,
        low: 0,
        median: 0.043478260869565216,
        series: [{reportdate:2013-01-06, trend:?, change:null, value:0},…]
    },
    objectNameB: {…}

I need the objectName becasue it's used in my templates to describe everything else.

here is how I am sorting the data

var items = _.sortBy(series_data.embeded, function(series, index) {
    return series.cd.last.value
}).reverse();`

This returns 0:{…}, 1:{…}, 2:{…}, when I need it to be objectNameA:{…},objectNameB:{…}.

OR better yet

0:{objectNameA:{…},…}, 1:{objectNameB:{…},…}

How do I keep or add the objectName while sorting in order from highest to lowest?

Upvotes: 4

Views: 1921

Answers (2)

minlare
minlare

Reputation: 2654

I achieved this by setting a key property on each object within the _.sortBy() - not ideal but one solution

_.sortBy(object, function(item, key) {
    item.key = key;
    return item.sortattribute;
});

Upvotes: 2

Andrew Johnston
Andrew Johnston

Reputation: 1129

I don't think that you can do this with a single call to _.sortBy().

However, you can accomplish it in two steps:

  1. call _.sortBy() and assign the key of each object as a property
  2. call _.each() on the sorted array to get the desired object structure

Here is an example JSBIN

The underlying problem is that objects are unordered collections of properties.

Upvotes: 2

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