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fix ancestors 오타 수정 #4

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fix ancestors 오타 수정 #4

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2 changes: 1 addition & 1 deletion _posts/2019-01-17-ruby-mixin-concern.md
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Expand Up @@ -43,7 +43,7 @@ irb > MyModule.new.instance_method
클래스의 인스턴스 메서드를 호출하면 ancestors 배열의 앞에서부터 메서드 정의를 찾습니다. 상속 개념과 유사하게, 메서드 정의를 찾지 못하면 다음 조상에게서 찾는 식입니다. 즉 둘 이상의 선조들이 같은 이름의 메서드를 정의하고 있다면 더 가까운 선조에 정의된 메서드를 실행합니다. 참고로 `BasicObject`까지 거슬러 올라갔는데도 메서드를 찾지 못하면 [BasicObject#method_missing](https://ruby-doc.org/core-2.5.0/BasicObject.html#method-i-method_missing)이 실행되는데, 몇몇 루비 gem들은 이를 이용해 이해하기 쉽지 않은 흑마술을 부리기도 하더군요.

```ruby
irb > String.acenstors
irb > String.ancestors
# => [String, Comparable, Object, Kernel, BasicObject]
irb > String.included_modules
# => [Comparable, Kernel]
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