async.filter([1, 3, 5], function (item, done) {

        done(null, item > 1);

    }, function (err, results) {

        console.log(results);

    });

    async.filter([1, 2, 3, 4, 5, 6], function(item, callback) {

      if (item > 3) {

          callback(null, true);

      } else {

        callback(false);

      }

​

    },

    function (err, result) {

      console.log("result: " + result);

    });