# Note: Read Schwartzian Transforms from bottom-up,
#  it makes it easier to understand that way.
@sorted =
  # And finally map back to the original array.
  # [3,['CCI003','1','N']] -> ['CCI003','1','N'].
  map { $_->[1] }

  # Sort by the numeric component we just extracted
  sort { $a->[0] <=> $b->[0] }

  # Map onto an array consisting of the numeric component
  #  of the first part.
  # ['CCI003','1','N'] -> [3,['CCI003','1','N'].
  map { [ $_->[0]=~/(\d+)/, $_] }

  # Take the initial array
  @array;