separate integer value for dimension table

integer_separator.rb

def main( i )
  i = i.to_s
  a = []
  i.size.times do |j|
    str = i[j]
    ( i.size - j - 1 ).times do
      str << '0'
    end
    a << str.to_i
  end
  a
end

require 'pp'

[ 123456, 12345678, 123456789 ].each do |i|
  puts i
  pp main( i )
  puts
end