Sort semantic version numbers.

sort-by-version.js

// Sort semantic version numbers that look like this:
// 0.21
// 0.21.4.3
// 0.21.4-18bdje
function (a, b) {
  a = a.split(/[-\.]/);
  b = b.split(/[-\.]/);
  for (var i = 0; i < a.length && i < b.length; i++) {
    if (parseFloat(a[i]) > parseFloat(b[i])) {
      return 1;
    }
    if (parseFloat(a[i]) < parseFloat(b[i])) {
      return -1;
    }
  }
  return 0;
}