title: Scala Array functions in Scala REPL
body: <p>I tried to create an array in scala.</p>
  <p>In scala repl when i put dot and press tab i could see only few function available.</p>
  <pre><code>scala&gt; val d = Array(1,2,3,4,5)
  d: Array[Int] = Array(1, 2, 3, 4, 5)
  scala&gt; d.
  apply          asInstanceOf   clone          isInstanceOf   length         toString       update
  </code></pre>
  <p>But i was able to run sum, head ,tail etc on Array although scala repl didn't show them.</p>
  <p>I couldn't understand why functions such as head, tail etc were not shown by scala repl.</p>