[i2]

Except it is, because your code doesn't work:

  > [10, 1, 5, 1, 10, 10, 1, 5, 5, 5, 10].sort(byNum)
  > [10, 10, 5, 1, 10, 1, 1, 5, 5, 5, 10]

The right way is

  > function byNum(a, b) { return a - b; }

[ceautery]

A bug in my code doesn't make javascript horrible, it makes me horrible for rushing to illustrate a point instead of just harrumphing internally and finishing my coffee.

Good catch.