例外オブジェクト

gistfile1.rb

irb(main):001:0> begin
irb(main):002:1*   raise ArgumentError, '何かエラー'
irb(main):003:1> rescue => e
irb(main):004:1>   puts "e.class = #{ e.class }"
irb(main):005:1>   puts "e.message = #{ e.message }"
irb(main):006:1> end
e.class = ArgumentError
e.message = 何かエラー
=> nil