title: Count how many times a value occurs in an array - javascript - angular - lodash
body: <p>I have two javascript arrays</p>
  
  <pre><code>var openDates = ["6/14/2015", "6/15/2015", "6/16/2015", "6/17/2015", "6/18/2015", "6/19/2015", ...]
  
  var entries = ["6/16/2015", "6/16/2015", "6/18/2015", "6/18/2015", "6/18/2015", "6/18/2015", "6/18/2015", "6/18/2015", "6/18/2015", "6/18/2015", "6/18/2015", "6/18/2015", "6/18/2015", "6/18/2015", "6/18/2015", "6/18/2015", "6/18/2015", "6/18/2015", "6/18/2015", "6/18/2015", "6/18/2015", "6/18/2015", "6/18/2015", "6/18/2015", "6/18/2015", "6/18/2015", "6/18/2015", "6/18/2015", "6/18/2015", "6/18/2015", "6/18/2015", "6/18/2015", "6/18/2015", "6/18/2015", "6/18/2015", "6/18/2015", "6/18/2015", "6/18/2015", "6/18/2015", "6/18/2015", "6/18/2015", "6/18/2015", "6/18/2015", "6/18/2015", ...]
  </code></pre>
  
  <p>How do I count how many times <strong>openDates</strong> occurs in <strong>entries</strong> in the format..</p>
  
  <pre><code>var entriesPerDay = [0, 0, 10, 2, 16, 18, 20, ...]
  </code></pre>
  
  <p>I have lodash installed but can't figure it out. I need to return the 0 value if there is no match.</p>