title: Hash to Array converting
body: <p>I need this Hash</p>
  
  <pre><code>{"peter" =&gt; ["apple", "orange", "mango"], "sandra" =&gt; ["flowers", "bike"]}
  </code></pre>
  
  <p>convert to this Array:</p>
  
  <pre><code>[["peter", "apple"], ["peter", "orange"], ["peter", "mango"], ["sandra", "flowers"], ["sandra", "bike"]]
  </code></pre>
  
  <p>Now I have got this solution</p>
  
  <pre><code>my_hash.inject([]){|ar, (k,v)| ar &lt;&lt; v.map{|c| [k,c]}}.flatten(1)
  </code></pre>
  
  <p>But I believe here is more elegant solution with those <code>zip</code> or <code>transpose</code> magick :)</p>