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ロガーもどきを作る時のコツ

sample.rb
def put_log(message)
  puts "#{`hostname`.chomp}:#{caller.first}:#{message}"
end

def method_a
  put_log('メッセージ')
end

method_a

実行結果

LAPTOP-5EMLK46H:sample.rb:6:in `method_a':メッセージ

LAPTOP-5EMLK46H は私のノートPCのマシン名。

どのマシンでのどのプログラムのどのメソッドでの出来事なのかというのが大事。

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Help us understand the problem. What are the problem?