Lo-Dash template fiddle

Nothing to see here, just a fiddle with Lo-Dash referenced

HTML

<script src="https://cdn.jsdelivr.net/lodash/4.15.0/lodash.min.js"></script>

JavaScript

var dataSource = { '2010': { '3': { '4': 1 }, '8': { '5': 1 } },'2014': { '8': {} },'2015': { '6': { '10': 1 } },'2016': { '7': { '19': 1 }, '8': { '4': 1 } } }

_.forEach(dataSource, function(item){
	_.forEach(item, function(obj){
  	if(Object.keys(obj).length === 0){
    console.log(item)
    }
  });

})