title: React JS Get Sum of Numbers in Array
body: <p>I have this array</p>
  
  <pre><code>const data = [
    {"One",prix:100},
    {"Two",prix:200},
    {"Three",prix:300}
  ]
  </code></pre>
  
  <p>and I want to get the sum of all those <code>prix</code> like this:</p>
  
  <pre><code>sum = 600
  </code></pre>