divmod_hash_each.rb

def div_hash_each(r)
    h = {}
    p = [10_000, 5_000, 2_000, 1_000, 500, 100, 50, 10, 5, 1]
    p.each_with_index{|d, index|
        a, r = r.divmod(d)
        h[d] = a
    }
    return h
end

p div_hash_each(123_456) # {10000=>12, 5000=>0, 2000=>1, 1000=>1, 500=>0, 100=>4, 50=>1, 10=>0, 5=>1, 1=>1}