Javascript unlimited category depth tree

I am trying to generate a tree of flat array , placing sub categories next to the parent category and having hard doing same.

var categories = [
  {
    name: 'Javascript'
  },
  {
    name: 'jQuery',
    parent: 'Javascript'
  },
  {
    name: 'AngularUi',
    parent: 'Angular'
  },
  {
    name: 'Angular',
    parent: 'Javascript'
  },
  {
    name: 'D3',
    parent: 'Javascript'
  }
];

var tree = [];

function getChilds(array,identifier){
    return _.filter(array,function(val){
        return val.parent == identifier
    });
}

function createTree(array){
    for(var x=0;x<_.size(array);x++){
      tree.push(array[x].name);
      var childs = getChilds(array,array[x].name);
        if(_.size(childs) > 0){
          createTree(childs);
        }else{
          $('div').append(JSON.stringify(tree));
        }
    }
}

createTree(categories);

<script src="http://ift.tt/OMnhxL"></script>
<script src="http://ift.tt/1oMJErh"></script>
<div></div>

Expected Output

['Javascript','Jquery','Angular','AngularUi','D3']

This is what i have tried so far, and using underscore for little help. Any help will be appreciated .