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ETDBMB ྫ֎͸l౤͛ͳ͍z d4DBMBCMFΤϥʔॲཧೖ໳d ϏζϦʔνࠤ౻༗ే

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ETDBMB ࿩͢ਓ w ৽ଔ೥໨ w ֶੜͷࠒ͸3VCZ w ۀ຿Ͱ͸4DBMBͱ5ZQF4DSJQU w 4DBMBྺ͸൒೥ ࠤ౻༗ేʢ!:VJJJUPUPʣ

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ETDBMB Έͳ͞Μ

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ETDBMB ྫ֎

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ETDBMB ౤͛ͯ·͔͢ʁ

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ETDBMB ྫ֎

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ETDBMB ัͬͯ·͔͢ʁ

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ETDBMB ྫ֎Λ౤͛ͳ͍ Τϥʔॲཧ͋Γ·͢ ͱ͍͏࿩Λ͠·͢

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ETDBMB ࠓ೔ͷΰʔϧ w 4DBMBͷΤϥʔॲཧΛ஌Δ w ྫ֎Λ౤͛ΔҎ֎ͷΤϥʔॲཧ͕͋Δ͜ͱ΋஌Δ

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ETDBMB Τϥʔॲཧͷྺ࢙ ͬ͘͟Γ PS/VMM࣌୅ ྫ֎ॲཧ ΤϥʔʹҙຯΛ͍࣋ͨͤͨ Τϥʔ͸·ͱΊͯॲཧ͍ͨ͠

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ETDBMB ྫ֎ॲཧͱ͸ʁ ݺͼग़͠ݩ ϝιου */ Τϥʔʂ $BUDIઅ ίʔϧελοΫΛͨͲΔ 065

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ETDBMB ͭΒ͍͜ͱ΋͋Δ ݺͼग़͠ݩ ϝιου 065 ίʔϧελοΫΛͨͲΔ $BUDIઅ

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ETDBMB ੍ޚϑϩʔ͕̎ͭ

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ETDBMB ͭΒ͍͜ͱᶄ ݺͼग़͠ݩ ϝιου 065 Τϥʔʂ ίʔϧελοΫΛͨͲΔ ❓❓ */

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ETDBMB $BUDI͠๨ΕΔ

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ETDBMB ͭΒ͍͜ͱ·ͱΊ ੍ޚϑϩʔ͕ෳࡶ Τϥʔॲཧ๨Ε

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ETDBMB ͍ͨ͜͠ͱ·ͱΊ ੍ޚϑϩʔΛ੔ཧ ΤϥʔॲཧΛڧ੍

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ETDBMB ੍ޚϑϩʔΛ੔ཧ͢Δʹ͸ ݺͼग़͠ݩ ϝιου &SSPSPS ਖ਼ৗ஋ &SSPSPS ਖ਼ৗ஋ Τϥʔ΋ҰͭͷΦϒδΣΫτͱͯ͠ฦ͢

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ETDBMB ͦ͜Ͱ4DBMBͩʂ

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ETDBMB ͦ͜Ͱ&JUIFSͩʂ

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ETDBMB 4DBMBͷ&JUIFSͱ͸ʁ w ̎ͭͷΦϒδΣΫτΛอ࣋Ͱ͖ΔΫϥε w ࣦഊ࣌ -FGU ͷΦϒδΣΫτɺ੒ޭ࣌ 3JHIU ͷΦϒδΣΫτΛอ࣋ w ̎ͭಉ࣌อ࣌͸Ͱ͖ͳ͍ &JUIFS -FGU 3JHIU

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ETDBMB ࣮ࡍʹॻ͍ͯΈΑ͏ def signUp(email: String): Either[Error, User] = { If (email.length < 5) { Left(Error(“Too Short Email!”)) } else { Right(User(email)) } } case class Error(msg: String) case class User(email: String) ฦΓ஋ ϝιου new &
 return Class

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ETDBMB ࣮ࡍʹॻ͍ͯΈΑ͏ def signUp(email: String): Either[Error, User] = { If (email.length < 5) { Left(Error(“Too Short Email!”)) } else { Right(User(email)) } } case class Error(msg: String) case class User(email: String) &JUIFS -FGU
 &SSPS 3JHIU 6TFS

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ETDBMB ͭ·Γ͜͏͍͏͜ͱ ݺͼग़͠ݩ TJHO6Q &JUIFS -FGU
 &SSPS 3JHIU 6TFS &JUIFS -FGU
 &SSPS 3JHIU 6TFS String

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ETDBMB Τϥʔॲཧ΋ڧ੍Ͱ͖Δ def main(args: Array[String]): Unit = { val either= signUp(“hoge@hoge.com”) either match { case Right(user) => logger.info(user.email) case Left(error) => logger.error(error.msg) } } ੒ޭͳΒ ࣦഊͳΒ

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ETDBMB ඒ͍͠ʢओ؍ʣ

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ETDBMB ͓͞Β͍ w ΤϥʔPSਖ਼ৗ஋ͱ͍͏஋Λฦ੍ͯ͠ޚϑϩʔΛ੔ཧ͢Δ w &JUIFS͸ΤϥʔॲཧΛڧ੍Ͱ͖Δ w ʢ͝ར༻͸ܭըతʹʣ

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ETDBMB ͋Γ͕ͱ͏͍͟͝·ͨ͠ʂ