title: How can I "extract" values from a multidimensional array in a smart way?
body: <p>I am using Ruby on Rails 3.2.2 and Ruby 1.9.2.</p>
  
  <p>Given the following multidimensional <code>Array</code>:</p>
  
  <pre><code>[["value1", "value1_other"], ["value2", "value2_other"], ["value3", "value3_other"]]
  </code></pre>
  
  <p>I would like to get (<em>note</em>: I would like to "extract" only the first value of all "nested" <code>Array</code>s):</p>
  
  <pre><code>["value1", "value2", "value3"]
  </code></pre>
  
  <p><em>How can I make that in a smart way?</em></p>