From: SonOfLilit <sonoflilit@...>
Date: 2007-02-20T04:32:46+09:00
Subject: Re: The peak of the iceberg, was Range cannot loop down and RCR Integer#pred

-1

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.

Why?

#succ is for #each .

#each is truly essential, as it gives totally new functonality.

#pred would be for a "different order of each". 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.

reverse_each isn't more useful than any other case of sorted_each.

Hmm, maybe we should implement that (no ue really, it's so slow it's
better left out of the path of least resistance.)