From: Robert Dober <robert.dober@...>
Date: 2007-02-20T06:41:05+09:00
Subject: Re: The peak of the iceberg, was Range cannot loop down and RCR Integer#pred

On 2/19/07, SonOfLilit <sonoflilit@gmail.com> wrote:
> -1

First I want to say that I do not mind hijacking threads at all so be
me guest ;)
But I have not talked about the things you are talking here.
>
> Though I can understand why it looks like an iceberg, I think it's one
> of those programmer icebergs that we invent to complete sets.
The iceberg is somewhere else but I do not want to talk about it yet.
>
> Why?
>
> #succ is for #each .
>
> #each is truly essential, as it gives totally new functonality.
>
> #pred would be for a "different order of each".
No sir, your interpretation, I do not advocate a different order of
each I am only talking about #pred.

It was just when I wanted for demonstration purpose implement a
generic reverse_each that I realized that I was missing #pred in a
more general way.

> Now, yes, I do know
> that there /is/ some use for reverse-each, but there are MANY OTHER
> different order-eaches that are as important. That's why
> #to_a.reverse.each is for those cases, that aren't so abundant as to
> /need/ a #reverse_each .
>
> If a fast reverse_each is needed, it's usually about numbers and then
> you have Numeric#step .
>
>
> Perhaps there would be use for this as a library, MAYBE even a
> standard library, but I wouldn't throw this in core Ruby.
What I am talking about *is* already in the core for Integer and I am
drying to apply the same logic to other #succ receivers.

I really feel very bad not having given enough thought to the RCR.
>
> reverse_each isn't more useful than any other case of sorted_each.
That could be argued but is completely OT.
>
> Hmm, maybe we should implement that (no ue really, it's so slow it's
> better left out of the path of least resistance.)
>
>
Again you'r making valid and reasonable points, no problem with that,
but they are not related to what I wanted to say. Well I feel at
least.

Robert
-- 
We have not succeeded in answering all of our questions.
In fact, in some ways, we are more confused than ever.
But we feel we are confused on a higher level and about more important things.
-Anonymous