On 23/1/2002 16:04 "Jason Orendorff" <jason at jorendorff.com> wrote:
> Actually the Lisp friend might like:
>
> f = lambda s: reduce(lambda x,y:x*y+x, range(len(s)), 1)
I rather like:
def Y( f ): return lambda x: f( Y(f), x )
f = lambda s: Y( lambda f, x: x and x * f(x-1) or 1 )( len(s) )
Not the most concise, but it has a certain beauty to it :-)
Jonathan