Rearranging the letters of a word

Hello there,

 I have to rearrange the letters of a word in all possible ways in

my rails application.I am not getting the exact way doing so, please
can anybody help me in developing that logic.

Thank you in advance.

Based on:

http://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-talk/139290

Author: Endy Tjahjono

class String
def perm
return [self] if self.length < 2
ret = []

   0.upto(self.length - 1) do |n|
      #rest = self.split('')
      rest = self.split(//u)            # for UTF-8 encoded

strings
picked = rest.delete_at(n)
rest.join.perm.each { |x| ret << picked + x }
end

   ret

end
end

p “abc”.perm #=> [“abc”, “acb”, “bac”, “bca”, “cab”, “cba”]

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