title: Restructure JSON output with jquery
body: <p>I get an array by json </p>
  
  <pre><code>[
      {"firstName":"John", "lastName":"Doe", "age":"34"}, 
      {"firstName":"Anna", "lastName":"Smith", "age":"28"}, 
      {"firstName":"Peter", "lastName":"Jones", "age":"36"}
  ]
  </code></pre>
  
  <p>but am expecting the result as below</p>
  
  <pre><code>[
      {"firstName":"John", "age":"34"}, 
      {"firstName":"Anna", "age":"28"}, 
      {"firstName":"Peter", "age":"26"}
  ]
  </code></pre>
  
  <p>Please help me with a solution using jquery</p>