ruby - 如何重构此Ruby代码以检查有效参数？

Question

有没有更好(更有说服力的)方法来检查有效参数？

def load_data filename, start_percent, end_percent
  raise 'Values must be [0,1]' if start_percent < 0
  raise 'Values must be [0,1]' if end_percent   < 0
  raise 'Values must be [0,1]' if start_percent > 1
  raise 'Values must be [0,1]' if end_percent   > 1
  ...

Ruby 1.9.3

编辑: start_percent和 end_percent应该是浮点数。

Answer 1

发生此错误时，您需要了解详细信息(什么样的错误，什么参数，什么无效值):

def load_data filename, start_percent, end_percent
  raise ArgumentError, "start_percent must be [0,1]; received #{start_percent}." unless start_percent.between?(0, 1)
  raise ArgumentError, "end_percent must be [0,1]; received #{end_percent}." unless end_percent.between?(0, 1)
end