Declaring an integer Range with step != 1 in Ruby
- by Dan Tao
Hey guys, I'm completely new to Ruby, so be gentle.
Say I want to iterate over the range of even numbers from 2 to 100; how would I do that?
Obviously I could do:
(2..100).each do |x|
if x % 2 == 0
# my code
end
end
But, obviously (again), that would be pretty stupid.
I know I could do something like:
i = 2
while i <= 100
# my code
i += 2
end
I believe I could also write my own custom class that provides its own each method (?). I am almost sure that would be overkill, though.
I'm interested in two things:
Is it possible to do this with some variation of the standard Range syntax (i.e., (x..y).each)?
Either way, what would be the most idiomatic "Ruby way" of accomplishing this (using a Range or otherwise)? Like I said, I'm new to the language; so any guidance you can offer on how to do things in a more typical Ruby style would be much appreciated.
