// Announce each queued job, one per second.

var jobs = ["backup", "resize", "email"];

for (var i = 0; i < jobs.length; i++) {

  setTimeout(function () {

    console.log("job " + i + ": " + jobs[i]);

  }, (i + 1) * 1000);

}

// expected: job 0: backup, job 1: resize, job 2: email

// actual:   job 3: undefined  (three times)  (!)