title: Get number of non-empty elements from nested arrays
body: <p>I have ten arrays with empty value</p>
  
  <pre><code>onTable[0 to 10];
  </code></pre>
  
  <p>look </p>
  
  <pre><code>["Jean5", "Jean3", "Paul2", "Jean6", "", "Paul4", "Jean", "peirre4", ""]
  ["Paul5", "peirre6", "peirre3", "", "Jean4", "Paul", "peirre5", "Jean2", ""]
  ...
  </code></pre>
  
  <p>I want get length of each array without empty value and without create ten variables for check that.</p>
  
  <p>I have test this solution
  <a href="https://stackoverflow.com/questions/6265940/count-empty-values-in-array">count empty values in array</a> but i dont want make ten variable. ie: <code>count1, count2,...</code>.</p>
  
  <p>I check too <a href="https://stackoverflow.com/questions/28413223/compare-two-arrays-based-on-length-skip-empty-values">compare two arrays based on length: skip empty values</a> but is not what i want.</p>
  
  <p>If possible, I want this look like</p>
  
  <pre><code>onTable[0].length(exclude(""))
  </code></pre>
  
  <p>What is the good way for make that?</p>