title: x := [...]string{"Sat", "Sun"} vs x:= []string{"Sat", "Sun"}
body: <p>In the go lang <a href="http://golang.org/ref/spec">spec</a> they used three dots in one of the examples:</p>
  
  <pre><code>days := [...]string{"Sat", "Sun"}  // len(days) == 2
  </code></pre>
  
  <p>Does it make any difference if the three dots are left out?</p>