The Sort::Versions module allows easy sorting (via comparisons) of mixed text
 and numeric strings, similar to the complex "version numbers" that many
 revision control packages and shared library systems use. For an explanation
 of the algorithm, it's easiest to look at these examples:
 .
  1.1 < 1.2
  1.1a < 1.2
  1.1 < 1.1.1
  1.1 < 1.1a
  1.1.a < 1.1a
  1 < a
  a < b
  1 < 2
 .
  (special handling for leading zeros)
  0002 < 1
  1.06 < 1.5
 .
  (a hyphen binds looser than a period)
  1-1 < 1-2
  1-2 < 1.2