From: Tim Hunter <TimHunter@...>
Date: 2007-11-11T06:17:51+09:00
Subject: Re: The Man or Boy Recursion Test

Werner wrote:
> Hello,
> 
> being new to ruby I try to understand the language. In a different
> context I came across the following:
> 
> http://en.wikipedia.org/wiki/Man_or_boy_test
> 
> Out of curiosity I tried to write an equivalent piece of code in ruby
> but apparently my depth of knowledge is not good enough.
> 
> Is there anyone who could enlighten me?
> 
> Thanks and Best Regards
> 
> Werner Dahn
> 

# Man or boy test
def a(k, x1, x2, x3, x4, x5)
   b ||= Proc.new { k -= 1; a(k, b, x1, x2, x3, x4) }
   return k <= 0 ? x4[] + x5[] : b[]
end

puts a(10, Proc.new {1}, Proc.new {-1}, Proc.new {-1}, Proc.new {1}, 
Proc.new {0})


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