Array of Numbers and Half Numbers in Ruby

Question

I'm trying to populate an array with sizes that are measured in whole and half numbers (i.e. 10, 10.5, 11, 11.5, 12). So far I have:

(10..12).map{ |size| [size, size + 0.5] }.flatten[0...-1]

Does a more eloquent way of doing this exist in Ruby without having to flatten and remove the last element?

Answer 1

My personal favorite:

>> (10..12).step(0.5).to_a
=> [10.0, 10.5, 11.0, 11.5, 12.0]