title: tslint error Use arrow function instead of function expression
body: <p>i am having tslint warnings and i am new to es6 and still having some difficulty with its syntax.so I am not entirely sure how to convert this one in arrow functions.</p>
  
  <p><a href="https://i.stack.imgur.com/5oCRv.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/5oCRv.png" alt="enter image description here"></a></p>
  
  <p>and here is my code:</p>
  
  <pre><code> let deletedQuestions = origQuestions.filter(function(obj) {
              return !updatedQuestions.some(function(obj2) {
                  return obj.value == obj2.value;
              });
            });
            console.log(deletedQuestions);
  
            let addedQuestions = updatedQuestions.filter(function(obj) {
              return !origQuestions.some(function(obj2) {
                  return obj.value == obj2.value;
              });
            });
  </code></pre>