code: function(array) {
        if (!array) { return; }
  
        return array.filter(function(value, index, self) {
          return self.indexOf(value) === index;
        });
      }
docs: Provides an easy mechanism for removing duplicates from an array.
  
  var myArray = [1, 2, 2, 3, 3, 3, 4, 4, 4, 4];
  
  $mdUtil.uniq(myArray) => [1, 2, 3, 4]
  
  @param {array} array The array whose unique values should be returned.
  
  @returns {array} A copy of the array containing only unique values.