Merge

var Baobab = require('baobab');

var tree = new Baobab({
  user: {
    name: 'Bob',
    settings: {
      foo: 'bar'
    }
  }
});

tree.select('user').merge({ age: 30, likes: 'apples'});

tree.select('user').get();
>>> { name: 'Bob', likes: 'apples', settings: { foo: 'bar' } }

// Note! The merge method will only do a *shallow merge*. 
// The following change:
tree.select('user').merge({ age: 30, settings: {show: 'something'}});

// Will override the complete settings object, not merge:
tree.select('user', 'settings').get(); // {show: 'something'}