title: Hot to make array of elements from array of tuples in fsharp
body: <p>The goal is to make from for example from [(1,2),(3,4),(5,6)] this array [|1,2,3,4,5,6|]. Msdn gives a simple <a href="https://msdn.microsoft.com/ru-ru/library/ee353905.aspx" rel="nofollow noreferrer">example</a> of Array.collect's usage. I tried to do the same with</p>
  <pre><code>x |&gt; Array.collect (fun (a,b) -&gt; [|a,b|]) 
  </code></pre>
  <p>but it still returns (a,b)[].
  Thanks for the help in advance.</p>