title: Merging collections to json array
body: <p>I have 2 json format, namely jsonA and jsonB, in which i would like to combine into jsonC as follow.
  Appreciate if someone can tell me how to do it.</p>
  
  <p>jsonA</p>
  
  <pre><code>{
      "text1": "Hello",
      "text2": "Hi",
      "text3": "There"
  }
  </code></pre>
  
  <p>jsonB</p>
  
  <pre><code>[
      {
          "id": "text1",
          "category": "Big"
      },
      {
          "id": "text2",
          "category": "Medium"
      },
      {
          "id": "text3",
          "category": "Small"
      },
  ]
  </code></pre>
  
  <p>Final</p>
  
  <pre><code>[
      {
          "id": "text1",
          "category": "Big",
          "message": "Hello"
      },
      {
          "id": "text2",
          "category": "Medium",
          "message": "Hi"
      },
      {
          "id": "text3",
          "category": "Small",
          "message": "There"
      }
  ]
  </code></pre>