How can I get a unique array based on object property using underscore

Question

I have an array of objects and I want to get a new array from it that is unique based only on a single property, is there a simple way to achieve this?

Eg.

Answer 1

You can use the _.uniqBy function

var array = [ { id: 1, name: 'bob' }, { id: 2, name: 'bill' }, { id: 1, name: 'bill' },{ id: 2, name: 'bill' } ];

var filteredArray = _.uniqBy(array,function(x){ return x.id && x.name;});

console.log(filteredArray)

In the above example, filtering is based on the uniqueness of combination of properties id & name.

if you have multiple properties for an object. then to find unique array of objects based on specific properties, you could follow this method of combining properties inside _.uniqBy() method.