functions.js

var q = require('queue-flow');

function asyncEmptyArray (args, callback) {
  console.log('empty array');
  callback(null, []);
}

function poof (callback) {
  q([null])
    .node(asyncEmptyArray, callback)
    .map(function(arr) { return [arr]; })
    .node(function (items, cb) {
      console.log('items: ' + JSON.stringify(items))
      console.log('cb: ' + cb)
      cb();
    }, callback)
    .on('close', function () { callback(); });
}

results.md

Calling:

poof( function (err) { console.log(err ? err : 'done'); });

Result:

empty array
items: []
cb: function () { [native code] }
done