Why objects of class Range in Ruby don't work in descending order?

Question

In developing my app, I found out that objects of class Range don't work in descending order. For example: ('1'..'8').each or ('a'...'h').each works fine, but ('8'..'1').each or ('h'...'a').each don't work at all! Is it should be or is it a mistake?

https://code.sololearn.com/cTSx2PcXiFBq

Answer 1

🇳🇬Brains You do not really need the for cycle. Well, in Ruby they are not really used, even tools like Rubocop give you warnings to use them.

10.downto(0) { |x| puts x }

Answer 2

Decrementing loops from what i know cannot be done with ranges:

for i in (10).downto(0)
puts i
end
or
(10).downto(0).each do|x|
puts x
end

Answer 3

Brain are you here ? I need ur help

Answer 4

Lol. Brains Can we talk privately?

Answer 5

Ok. Pass me your mail or other.

Answer 6

desc = Array.new

('a'..'z').to_enum(:reverse_each).each { |alpha| desc << alpha }

desc.each { |alpha| puts "letter : #{alpha}"}

Answer 7

Mohamed Elomari
Thanks for the specified way of the decision of this problem.

Answer 8

Mohamed Elomari
I have found another similar way, which is shorter by the number of letters. Perhaps it will be interesting to you.

desc = []
('a'..'z').to_a.reverse.each { |x| desc << x}