From: Michel Belleville <michel.belleville@...>
Date: 2007-06-07T19:24:47+09:00
Subject: Re: Mutually-Recursive Functions

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Well, actually as far as I can tell your even / odd functions principle
works a treat. There's just a small bug :
def my_even(x)
       x == 0 or odd(x - 1)
end

def my_odd(x)
       x != 0 and even(x - 1)
end

The name my_even and even doesn't match, as my_odd and odd, so if u do
something like that :
def even?(x)
       x == 0 or odd?(x - 1)
end

def odd?(x)
       x != 0 and even?(x - 1)
end

It should work.

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