method
    
    reverse!
  reverse!()
  public
  Reverses self in place.
a = [ "a", "b", "c" ] a.reverse! #=> ["c", "b", "a"] a #=> ["c", "b", "a"]
  reverse!()
  public
  Reverses self in place.
a = [ "a", "b", "c" ] a.reverse! #=> ["c", "b", "a"] a #=> ["c", "b", "a"]