title: How to find all keys with certain name in json?
body: <p>I have many similar JSON objects with different sizes, I need to run through all keys with certain names and get values of it.</p>
  <p>for example I have 3 JSONs:</p>
  <pre><code>[
    {
      &quot;name&quot;: &quot;temp&quot;,
      &quot;url&quot;: &quot;http://temp.com&quot;,
      &quot;content&quot;: {
        &quot;content&quot;: &quot;temp&quot;,
        &quot;url&quot;: &quot;https://temp1.com&quot;
      }
    },
    {
      &quot;name&quot;: &quot;temp&quot;,
      &quot;url&quot;: &quot;http://temp.com&quot;,
      &quot;content&quot;: [
        {
          &quot;content&quot;: &quot;temp&quot;
        },
        {
          &quot;url&quot;: &quot;https://temp1.com&quot;
        }
      ]
    },
    {
      &quot;name&quot;: &quot;temp&quot;,
      &quot;content&quot;: {
        &quot;content&quot;: &quot;temp&quot;
      }
    }
  ]
  </code></pre>
  <p>So I need extract the value from all keys &quot;<code>url</code>&quot; (but this key is not necessary and can be not in json )</p>
  <p>the target output:</p>
  <pre><code>http://temp.com
  https://temp1.com
  http://temp.com
  https://temp1.com
  </code></pre>