gistfile1.js

function values (ary) {
  var i = 0;
  return function (end, cb) {
    if (i < ary.length) cb(true);
    else cb(null, ary[i++])
  }
}

function sync (read) {
  read(null, function next (err, data) {
    console.log(data);
    if(!end) read(null, next)
  })
}

function map(func) {
  return function (read) {
    return function (end, cb) {
      read(end, function (end, data) {
        cb(end, !end && func(data))
      })
    }
  }
}

sink()(map(function (e) {
  return e*10;
})(values([1,2,3])))