title: How to find value in array based conditional
body: <p>I was collect data an array with 2 coloumn look like this</p>
  
  <pre><code>---------------
  Order  | Value
  ---------------
  order1 | 45
  order2 | 70
  order1 | 85
  order2 | 32
  --------------
  </code></pre>
  
  <p>How to get all value in the array based conditional where order= order1 only and sum them?</p>
  
  <p>Thank you,</p>