From: Trans <transfire@...>
Date: 2007-11-10T23:37:59+09:00
Subject: Re: equivalent injecting implementations?



On Nov 10, 8:50 am, "Rick DeNatale" <rick.denat...@gmail.com> wrote:
> On 11/9/07, Trans <transf...@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.

Oh sorry, I meant to put that. These are Enumerable methods.

T.