# 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"]
On Apr 1, 8:44 am, "railsb...@gmail.com" <railsb...@gmail.com> wrote:
> 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.
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