title: filter array with same values
body: <p>I need to find all employees(EmpID) with same projects(ProjectID), data will be dynamic, this array is for example.</p>
  <pre><code>[
    { EmpID: '143,', ProjectID: '12,', DateFrom: '2013-11-01,', DateTo: '2014-01-05\r' },
    { EmpID: '218,', ProjectID: '10,', DateFrom: '2012-05-16,', DateTo: 'NULL\r' },
    { EmpID: '143,', ProjectID: '10,', DateFrom: '2009-01-01,', DateTo: '2011-04-27' },
  ];
  
  </code></pre>
  <p>I want this array to be -&gt;</p>
  <pre><code>[
    { EmpID: '218,', ProjectID: '10,', DateFrom: '2012-05-16,', DateTo: 'NULL\r' },
    { EmpID: '143,', ProjectID: '10,', DateFrom: '2009-01-01,', DateTo: '2011-04-27' },
  ];
  </code></pre>