I have an array:
[1,2,3,4,5,6,7,8,9,0]
that I\'d like to iterate 3 at a time, which produces
1,2,3 and 4,5,6 and 7,8,9
Use .each_slice
[1,2,3,4,5,6,7,8,9,0].each_slice(3) {|a| p a}