Version Sort

version-sort.rb

class Array
  def version_sort
    self.sort_by do |file|
      file.scan(/\d+|[a-z]*/).map { |el| el.to_i }
    end
  end
end

filenames = [
  "foo-1.10.2.ext",
  "foo-1.11.ext",
  "foo-1.3.ext",
  "foo-1.50.ext",
  "foo-1.8.7.ext",
  "foo-1.9.3.ext",
  "foo-1.ext",
  "foo-10.1.ext",
  "foo-10.ext",
  "foo-100.ext",
  "foo-13.ext",
  "foo-2.0.0.ext",
  "foo-2.0.1.ext",
  "foo-2.0.ext",
  "foo-2.007.ext",
  "foo-2.01.ext",
  "foo-2.012b.ext",
  "foo-2.01a.ext",
  "foo-2.0a.ext",
  "foo-2.0b.ext",
  "foo-2.1.ext",
  "foo-25.ext",
  "foo-6.ext",
]
version_sorted_filenames = [
  "foo-1.ext",
  "foo-1.3.ext",
  "foo-1.8.7.ext",
  "foo-1.9.3.ext",
  "foo-1.10.2.ext",
  "foo-1.11.ext",
  "foo-1.50.ext",
  "foo-2.0.ext",
  "foo-2.0a.ext",
  "foo-2.0b.ext",
  "foo-2.0.0.ext",
  "foo-2.0.1.ext",
  "foo-2.01.ext",
  "foo-2.1.ext",
  "foo-2.01a.ext",
  "foo-2.007.ext",
  "foo-2.012b.ext",
  "foo-6.ext",
  "foo-10.ext",
  "foo-10.1.ext",
  "foo-13.ext",
  "foo-25.ext",
  "foo-100.ext",
]
# assert_equal filenames.version_sort, version_sorted_filenames
filenames.version_sort.each {|el| puts el}