From: Elliot Temple <curi@...>
Date: 2006-07-13T16:21:07+09:00
Subject: Re: Recursion and Ruby


On Jul 13, 2006, at 12:13 AM, Glenn Cadman wrote:

> def fib ( n )
>  if n == 0
>   return 0
>  elseif n == 1
>   return 1
>  else
>   return fib(n-1) + fib(n-2)
>  end
> end

You have a typo. it is elsif not elseif.

elseif is just treated like a method call. it doesn't exist, but that  
error didn't come up because it was never reached. 0 gets returned  
first in that branch. otherwise it goes straight to the else clause.


-- Elliot Temple
http://www.curi.us/blog/