Possibly a horrible way to trim elements in nested arrays?

deepTrimAsync.js

function deepTrimAsync(array, cb) {

  async.map(array, function(item, callback) {

    if(!Array.isArray(item)) {

      if(typeof item === 'string') {

        item = sanitize(item).trim();

      }

      return callback(null, item);

    }

    trimArrayElementsAsync(item, function(err, results) {

      if(err) return console.error(err);

      return callback(null, results);

    });

  }, function done(err, results) {

    if(err) return console.error(err);

    return cb(null, results);

  });

}