Declaring an integer Range with step != 1 in Ruby

Question

UPDATE 2: For posterity, this is how I\'ve settled on doing it (thanks to Jorg\'s input):

100.step(2, -2) do |x|
    # my code
end
         


        

Answer 1

You can't declare a Range with a "step". Ranges don't have steps, they simply have a beginning and an end.

You can certainly iterate over a Range in steps, for example like this:

(2..100).step(2).reverse_each(&method(:p))

But if all you want is to iterate, then what do you need the Range for in the first place? Why not just iterate?

100.step(2, -2, &method(:p))

This has the added benefit that unlike reverse_each it does not need to generate an intermediate array.