From: Harry Spier <harryspier@...>
Date: 2010-11-19T13:01:35+09:00
Subject: Descending ranges in Ruby

Dear list members,

(5..1).to_a #returns []
(1..5).to_a #returns [1,2,3,4,5]
(5..1).each{|x| puts x} #prints (-5..-1)
(1..5).each{|x| puts x} #prints
1
2
3
4
5

I don't get an error message when I declare a descending Range or when I
apply an iterator method to it, but I'm not able to iterate over a
descending Range the same way I can an ascending Range.  Can someone
explain what the rationale is behind that language restriction?

Thanks,
Harry

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