title: What does Array((1L, 2L)) do?
body: <p>What does the following code do?</p>
  
  <pre><code>var pair: RDD[(Long,Long)] = sparkContext.parallelize(Array((3L, 4L)))
  </code></pre>
  
  <p>Does variable "pair" consist of a single element/pair? The types of 3 and 4 is "long" not "int".</p>