Building Enumerable & Enumerator in Ruby

When I first came to Ruby, one of the things that impressed me the most was the killer features provided by the Enumerable module. I eventually also came to love Enumerator, even though it took me a long time to figure out what it was and what one might use it for. As a beginner, I had always assumed that these features worked through some dark form of magic that was buried deep within the Ruby in

[shuzo_kino]

自力でEnumeratorを実装してみよう！　というアレ