mustache.js/test/_files/null_lookup_object.js

({
    "name": "David",
    "twitter": "@dasilvacontin",
    "fobject": [
    	{
    		"name": "Flor",
    		"twitter": "@florrts"
    	},
    	{
	        "name": "Miquel",
	        "twitter": null
	    },
	    {
	    	"name": "Chris",
	        "twitter": undefined
	    }
    ],
    "favorites": {
      "color": "blue",
      "president": "Bush",
      "show": "Futurama"
    },
    "mascot": {
      "name": "Squid",
      "favorites": {
        "color": "orange",
        "president": undefined,
        "show": null
      }
    }
})