Underscore: sortBy() based on multiple attributes

Question

I am trying to sort an array with objects based on multiple attributes. I.e if the first attribute is the same between two objects a second attribute should be used to comap

Answer 1

Just return an array of properties you want to sort with:

ES6 Syntax

var sortedArray = _.sortBy(patients, patient => [patient[0].name, patient[1].roomNumber])

ES5 Syntax

var sortedArray = _.sortBy(patients, function(patient) { 
    return [patient[0].name, patient[1].roomNumber]
})

This does not have any side effects of converting a number to a string.