title: Array conversion to hash
body: <p>I'm confused as to this behavior.  Do I really need to split my array to make this work?</p>
  
  <pre><code>pry(main)&gt; ary = ["foo", "bar"]
  =&gt; ["foo", "bar"]
  
  pry(main)&gt; Hash[ary]
  =&gt; {"f"=&gt;"o", "b"=&gt;"a"}
  
  pry(main)&gt; Hash["foo", "bar"]
  =&gt; {"foo"=&gt;"bar"}
  
  pry(main)&gt; Hash[["foo", "bar"]]
  =&gt; {"f"=&gt;"o", "b"=&gt;"a"}
  
  pry(main)&gt; Hash[ary.split(",")]
  =&gt; {"foo"=&gt;"bar"}
  </code></pre>