convert array of object to array of string - lodash

You can use Lodash's map method.

var data = [
  {
    0:{
       id:5,
       name:'xxx'
      }
  },
  {
    1:{
       id:6,
       name:'yyy'
      }
  }
];

var arr = _.map(data, function(element, idx) {
  return element[idx].name;
});

console.log(arr);

<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.4/lodash.js"></script>

As yBrodsky pointed out, this assumes the object key continues to increase by one each time.

Here's a solution that makes use of lodash's flatMapDeep to extract the values before plucking the name:

let data = [
  {
    0:{
       id:5,
       name:'xxx'
      }
  },
  {
    1:{
       id:6,
       name:'yyy'
      }
  }
]

let result = _(data)
    .flatMapDeep(_.values)
    .map('name')
    .value()

Edit Change the map to return a different value for each item. e.g to return the id and name as a key value pair you could do this:

let result = _(data)
    .flatMapDeep(_.values)
    .map( item => ({[item.id]: item.name}) )
    .value()

No Lodash, but maybe:

var arr = [];

x.forEach(function(item, index) {
    arr.push(item[index].name)
});
console.log(arr)

This assuming the object key keeps increasing, 0, 1, 2....n