This is exactly what the previous code did.

See [Hash#merge](http://www.ruby-doc.org/core-2.1.0/Hash.html#method-i-merge) docs:

```ruby
h1 = { "a" => 100, "b" => 200 }
h2 = { "b" => 254, "c" => 300 }
h1.merge(h2)   #=> {"a"=>100, "b"=>254, "c"=>300}
```