nat-sorts/natural_sort.rb

# Copyright (c) 2013, Lily Carpenter
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without modification,
# are permitted provided that the following conditions are met:
#
#   Redistributions of source code must retain the above copyright notice, this
#   list of conditions and the following disclaimer.
#
#   Redistributions in binary form must reproduce the above copyright notice, this
#   list of conditions and the following disclaimer in the documentation and/or
#   other materials provided with the distribution.
#
#   Neither the name of Lily Carpenter nor the names of its
#   contributors may be used to endorse or promote products derived from
#   this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
# ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
# ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

require 'naturally'

def nat_sort(list)
  to_be_sorted = []
  list.each { |list_elem|
    temp = []
    list_elem.chars.chunk { |chunk_elem|
      begin
        Integer(chunk_elem)
      rescue ArgumentError
        false
      else
        true
      end
    }.each { |elem|
      if elem[0]
        temp << Integer(elem[1].join())
      else
        temp << elem[1].join()
      end
    }
    to_be_sorted << temp
  }

  sorted = []
  to_be_sorted.sort().each { |string|
    sorted <<  string.join()
  }

  sorted
end

to_sort = []
range = 99999..0
(range.first).downto(range.last).each { |x|
  to_sort << "eth" + x.to_s
}

nat_sort(to_sort)
#Naturally.sort(to_sort)