title: Return hash key if hash includes value in Ruby
body: <p>I have a hash <code>hash</code> like so:</p>
  
  <pre><code>hash = {"Addaptive Accessibility"=&gt;["one","two"],
  
          "Atmosphere (Feeling/Safety)"=&gt;["three", "four"],
  
          "Aquatics (Size)"=&gt;["five", "six"]}
  </code></pre>
  
  <p>I then have an array <code>array</code>:</p>
  
  <p><code>array = ["one","seven"]</code></p>
  
  <p>I need to search the hash for each word in my array, and if the word is found I need to return the associated <code>key</code> from the hash. Something like this:</p>
  
  <pre><code>array.each do |word|
    if hash.include? word
      puts key
    end
  end
  </code></pre>
  
  <p>How can I write that, and write it better?</p>