組み込みクラス一覧 A〜E ARGF.class (843) Array (2016) BasicObject (154) Bignum (99) Binding (78) Class (80) Complex (527) Data (36) Dir (538) Encoding (2449) Encoding::Converter (253) Encoding::InvalidByteSequenceError (77) Encoding::UndefinedConversionError (55) Enumerator (194) Enumerator::ArithmeticSequence (84) Enumerator::Chain (36) Enumerator::Lazy (389) Enumerator::Yielder (27) Errno::EXXX (33) Excep
