title: Accessing 'this' inside the callback should reference my array
body: <p>im kinda new at javascript so i have an function which is given an array and it filters its elements from the arguments it is passed. What i need though is to make  'this' inside the callback function to refference at my originalArray so that <code>console.log(this);</code> would acctually print [1,2,3]. Have in mind that i acctually need to this in these lines because i can only edit all those lines not add some more.</p>
  
  <p>Here is my code:</p>
  
  <pre><code>function makeMultiFilter(array) {
      // What we track
      // TO BE COMPLETED
     // TO BE COMPLETED
      return (function arrayFilterer(pred, callback) {
  
  
          // If filter not a function return current Array
          // TO BE COMPLETED
              // TO BE COMPLETED
          // Filter out things
          // TO BE COMPLETED
  
          // If callback is a function, execute callback
          // TO BE COMPLETED
          // TO BE COMPLETED
              return arrayFilterer;
      });
  }
  </code></pre>
  
  <p>And the test code:</p>
  
  <pre><code>var arrayFilterer = makeMultiFilter([1, 2, 3]);
  // call arrayFilterer to filter out all the numbers not equal to 2
  arrayFilterer(function(elem) {
  
      return elem != 2; // check if element is not equal to 2
  }, function(currentArray) {
      console.log(this); // prints [1,2 3]
      console.log(currentArray);
  }); // prints [1, 3]`
  </code></pre>