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From: Eric I. on 29 Jun 2008 12:58
On Jun 29, 12:14 pm, Tj Superfly <nonstickg...(a)verizon.net> wrote:
> Okay, why not! Here's what I'm trying to do.
>
> The website has urls for all their pet images, each having one of the
> random combination's inside of it. As such:
>
> http://pets.neopets.com/cp/rbm2vqzv/1/2.png
>
> So, basically I want to create some sort of list / program that searches
> though them and tells me if they exist or not, so I can see new pets
> when they are eventually uploaded.
>
> P.S. That's where I got random generation, because each url is random,
> but I guess ultimately my list is 'complete' so, sorry about that.
>
> Best Regards,
>
> TJ
> --
> Posted viahttp://www.ruby-forum.com/.

First realize that if you're looking for an 8 digit sequence, where
each digit is one of 36 characters, then there are 36**8, or
2,821,109,907,456 combinations. Are you really going to hit the web
site with nearly 3 trillion requests? And if you try, can we place
bets on which will happen first:

1) You get contacted by the web site's lawyers.
2) You get contacted by a law enforcement agency.
3) You get cut off by your ISP.

That said, the following code will generate all 46,656 possibilities
of size 3 (and by changing one variable you can get combinations of a
different size):

char_count = 3
base = 36

0.upto(base**char_count - 1) do |value|
puts value.to_s(base).rjust(char_count, '0')
end

Eric

====

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