Array with object sorting with Underscore sortBy

Javascriptnode.jsSortingunderscore.js

Javascript Problem Overview

I have this array. How do I use underscore '_.sortBy' to sort it according to start date?

[
    { 
        id: 'oljw832021kjnb389xzll323jk',
        start: { dateTime: '2013-09-26T13:30:00-07:00' },
        end: { dateTime: '2013-09-26T14:30:00-07:00' },
    },
    { 
        id: 'ed7l5tmckdp0lm90nvr4is3d4c',
        start: { dateTime: '2013-09-26T15:30:00-07:00' },
        end: { dateTime: '2013-09-26T16:30:00-07:00' },
    },
    { 
        id: 'etmasdsackdp0kjl0nvrkopioqw',
        start: { dateTime: '2013-09-26T18:00:00-07:00' },
        end: { dateTime: '2013-09-26T19:00:00-07:00' },
    }
]

Javascript Solutions

Solution 1 - Javascript

Use an iterator function, not a single string for a property:

_.sortBy(arr, function(o) { return o.start.dateTime; })

Solution 2 - Javascript

I did it this way:

var sorted = _(list).sortBy(
                    function (item) {                        
                        return [new Date(item.effectiveDate).getTime(), item.batchId];
                    }), "batchId");

If you want it descending then it's the same thing but *-1

var sorted = _(list).sortBy(
                    function (item) {                        
                        return [new Date(item.effectiveDate).getTime()*-1, item.batchId];
                    }), "batchId");

In this example I am ordering by two fields, you can forget about the item.batchId.

Hope this helps someone.

Solution 3 - Javascript

var sortedItem = _.sortBy(yourArrayName, ["start"])

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Content TypeOriginal AuthorOriginal Content on Stackoverflow
QuestionJack DreView Question on Stackoverflow
Solution 1 - JavascriptBergiView Answer on Stackoverflow
Solution 2 - JavascriptSanchitosView Answer on Stackoverflow
Solution 3 - Javascriptinshu choudharyView Answer on Stackoverflow