From: Rick DeNatale <rick.denatale@...>
Date: 2007-11-10T22:50:22+09:00
Subject: Re: equivalent injecting implementations?

On 11/9/07, Trans <transfire@gmail.com> wrote:
> Are these strictly equivalent? I get the feeling no, but I haven't
> been able to demonstrate it yet.
>
>   def injecting(s)
>     inject(s) do |k, i|
>       yield(k, i); k
>     end
>   end
>
>   def injecting(res, &block)
>     ([res]*length).zip(to_a).each(&block)
>     res
>   end
>
> Thanks,
> T.

I can't see how in general they can be.

In which class or module are you defining these?  Since you are using
inject and each, I'm guessing that it's either Enumerable or some
subclass,

But then depending on which subclass you don't have a length method so...

Perhaps some more context would help.

-- 
Rick DeNatale

My blog on Ruby
http://talklikeaduck.denhaven2.com/