title: scala convert List of map to map
body: <p>I have a simple question</p>
  
  <p>I have List of Map like this</p>
  
  <pre><code>List(
        Map("a" -&gt; "a"),
        Map("b" -&gt; "b")
      )
  </code></pre>
  
  <p>And I want the result like this </p>
  
  <pre><code>Map(
    "a"-&gt;"a",
    "b"-&gt;"b"
  )
  </code></pre>
  
  <p>It can be overwrite if the key is duplication 
  Any one please help me</p>