arrays - How to filter the object using lodash or javascript -

i getting object server,

var data = {   test1: {     documents: []   },   test2: {     documents: [{       vid: 'sdfas23',       typeid: '81',       isdeleted: false     }],     answer: true   },   test3: {     documents: [{       vid: 'h1mjinyi',       typeid: '82',       isdeleted: false     }],     answer: true   } } 

i want filter typeid object, result expecting

[81,82] 

can on this.

in case have 1 or 0 objects in documents in example can use reduce() object.keys()

var data = {"test1":{"documents":[]},"test2":{"documents":[{"vid":"sdfas23","typeid":"81","isdeleted":false}],"answer":true},"test3":{"documents":[{"vid":"h1mjinyi","typeid":"82","isdeleted":false}],"answer":true}}    var result = object.keys(data).reduce(function(a, e) {    if (data[e].documents[0]) a.push(data[e].documents[0].typeid);    return a;  }, [])    console.log(result)

for multiple objects in documents array can add foreach loop previous code (there 2 objects in test3.documents)

var data = {"test1":{"documents":[]},"test2":{"documents":[{"vid":"sdfas23","typeid":"81","isdeleted":false}],"answer":true},"test3":{"documents":[{"vid":"h1mjinyi","typeid":"82","isdeleted":false},{"vid":"random","typeid":"100","isdeleted":false}],"answer":true}}    var result = object.keys(data).reduce(function(a, e) {    if (data[e].documents.length) data[e].documents.foreach(function(p) {      a.push(p.typeid);    });    return a;  }, [])    console.log(result);