From: Ari Brown <ari@...>
Date: 2007-04-23T09:59:08+09:00
Subject: Shuffle Method

Once again, hello

Normally I'd go to my dad for something like this. But since he's out  
and you all are hyperactive posters...

I've been writing my own shuffling method, and I end up getting  
doubles in it.
For instance, output might say something like:
fun
cat
zoo
zoo

Now, it's NOT supposed to do that, but it does anyways. I am clueless  
as to what the problem is. What I DID notice, however (When using  
source 2) was that it seemed to pop off the last item in the array.  
Repeatedly. Yes, it's supposed to do that, but the last item changes  
each time. How does it keeping popping off, say, 'fun' repeatedly?

Lotsa source code here, but I appreciate the help. Thanks  
ridonculously a lot.

--------------------------------------------------------------|
SOURCE 1
--------------------------------------------------------------|
some_array= ['cat', 'dog', 'fun', 'zoo']


def shuffle some_array
   recurssive_shuffle some_array
end

def recurssive_shuffle some_array
   n = some_array.length
   helper_array = []
   new_array = []
   while n != 0
     r = rand(n)
     while some_array.length != (r + 1)
       helper_array.push some_array.pop
     end
     new_array.push some_array.pop
     n = (n - 1)
     helper_array.each do |item|
       some_array.push item
     end
   end
   puts new_array
end

shuffle some_array
--------------------------------------------------------------|
SOURCE 2
--------------------------------------------------------------|
some_array = ['cat', 'dog', 'fun', 'zoo']


def shuffle some_array
   recurssive_shuffle some_array
end

def recurssive_shuffle some_array
   n = some_array.length
   helper_array = []
   new_array = []
   while n != 0
     r = rand(n)
     while some_array.length != (r + 1)
       helper_array.push some_array.pop
       puts 'Array'
       puts helper_array
       puts
     end
     new_array.push some_array.pop
     n = (n - 1)
     helper_array.each do |item|
       some_array.push item
     end
   end
   puts new_array
end

shuffle some_array


---------------------------------------------------------------|
~Ari
"I don't suffer from insanity. I enjoy every minute of it" --1337est  
man alive