From: ts <decoux@...>
Date: 2001-12-12T00:26:31+09:00
Subject: [ruby-talk:28229] Re: Hash.keys Q

>>>>> "L" == Leo Laursen <l.laursen@mail1.stofanet.dk> writes:

L> Now options.keys returns ["Password", "Host", "Port", "Name"]

L> I would expect ["Host", "Port", "Name", "Password"]

L> is there an explanation for this ?

 Yes, the order of the keys in an Hash depend of the hash function. For
 example in your case, the order is given by

pigeon% cat b.rb
#!/usr/bin/ruby
["Password", "Host", "Port", "Name"].each do |key|
   puts "#{key} -- #{key.hash % 10}"
end
pigeon% 

pigeon% b.rb
Password -- 2
Host -- 7
Port -- 8
Name -- 9
pigeon% 

 10 is the default size value when ruby build an Hash


Guy Decoux