From: Robert Feldt <feldt@...>
Date: 2003-09-16T05:55:08+09:00
Subject: Re: performance and style advice requested

Robert Klemme <bob.news@gmx.net> skrev den Tue, 16 Sep 2003 05:08:35 +0900:

>> def fact(n)
>> @facts[n] ||= (@facts.length..n).inject(@facts.last) {|f, i| @facts[i] =
> i * f}
>> end
>
> And, I think there's a subtle bug with the inject parameter.  Another
> version:
>
> def fact(n)
> @facts ||= [0,1]
> @facts[n] ||= (@facts.length..n).inject(@facts[-1]) {|f, i| @facts[i] = i
> * f}
> end
>
Can you spell it out for me? I fail to see the difference.

And I wouldn't do the initial assignment inside the method when
we're discussing performance...

Regards,

/Robert