Add only unique objects to an array in JavaScript

javascript arrays json sorting underscore.js

The Underscore findWhere function does exactly what you need - it's not an indexOf search by object identity, but searches objects whose properties have the same values as the input.

if (_.findWhere(shippingAddresses, toBeInserted) == null) {    shippingAddresses.push(toBeInserted);}

javascript arrays json sorting underscore.js

Basic example using lodash union method:

var a = [1,2,3];// try to add "1" and "4" to the above Arraya = _.union(a, [1, 4]);console.log(a);

<script src="//cdnjs.cloudflare.com/ajax/libs/lodash.js/4.13.1/lodash.min.js"></script>

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