rbishop

def times_table number
  multiplier = 1
  while multiplier <= number
    range = (1..number).to_a
    row = range.map do |x|
      x * multiplier
    end
    puts row.join(' ')
    multiplier += 1
  end

rbishop

def count_between arr, lower, upper
  return 0 if arr.length == 0 || lower > upper
  return arr.length if lower == upper
  range = (lower..upper).to_a
  arr.select { |value| range.include?(value) }.length
end