module MoreMath::Functions

def log_floor(n, b = 2)
  raise ArgumentError, "n is required to be > 0" unless n > 0
  raise ArgumentError, "b is required to be > 1" unless b > 1
  e, result = 1, 0
  until e * b > n
    e *= b
    result += 1
  end
  result
end