When there are functions as values, that hasn't been handled

[dinukadesilva]

For an example, following goes to the front-end with null values assigned.

var config = [{
    type: 'expand',
    message: 'Overwrite ' + rfilepath + '?',
    choices: [{
      key: 'y',
      name: 'overwrite',
      value: function (cb) {
        self.adapter.log.force(rfilepath);
        return cb('force');
      }
    }, {
      key: 'n',
      name: 'do not overwrite',
      value: function (cb) {
        self.adapter.log.skip(rfilepath);
        return cb('skip');
      }
    }, {
      key: 'a',
      name: 'overwrite this and all others',
      value: function (cb) {
        self.adapter.log.force(rfilepath);
        self.force = true;
        return cb('force');
      }
    }, {
      key: 'x',
      name: 'abort',
      value: function (cb) {
        self.adapter.log.writeln('Aborting ...');
        return process.exit(0);
      }
    }, {
      key: 'd',
      name: 'show the differences between the old and the new',
      value: function (cb) {
        self.diff(fs.readFileSync(filepath, 'utf8'), content);
        return self._ask(filepath, content, cb);
      }
    }],
    name: 'overwrite'
  }];