とちぎRuby会議05懇親会駄話
ϚϦʔͱΘͨ͠Marie and Me2013/09/21 @track8
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ࣗݾհ‣ @track8ɹ‣ ͙Μ·ͷαϥϦʔϚϯ / ϓϩάϥϚ‣ ͙Μ·Rubyձٞ01Ͱ͓ੈʹͳΓ·ͨ͠
ۙگ
࠲ӈͷ
࠲ӈͷ‣ ”ύϯ͕ແ͚ΕɺέʔΩΛ৯Ε͍͍͡Όͳ͍”
࠲ӈͷ‣ ”ύϯ͕ແ͚ΕɺέʔΩΛ৯Ε͍͍͡Όͳ͍”ϚϦʔɾΞϯτϫωοτ
ͳʹ͕ྑ͍͔‣ ࠷ۙʹͳͬͯδϫδϫ͖͍ͯΔݴ༿‣ ͦ͜(ύϯɺέʔΩ)͡Όͳ͍ͬͯ͜ͱΛڭ͑ͯ͘ΕΔ
tweet‣ Կ͔Ζ͏ͱͨ͠ͱ͖ʹͭͿ͍ͯΈΔɻ‣ ࣗୡ͕ղ͜͏ͱ͍ͯ͠ΔԿ͔‣ ʙͳΒʙ͍͍͡Όͳ͍
ϚϦʔ‣ Ұ୴ཱͪࢭ·ͬͯɺݴͬͯΈΔ‣ ϚϦʔύλʔϯ‣ Ξϯτϫωοτઢ
ۙͳྫ‣ NullReferenceͷྫ֎͕ͰͨΒnullνΣοΫ͢Ε͍͍͡Όͳ͍‣ ྫ֎͕ग़ͨͳΒɺѲΓͭͿ͍͍ͤ͡Όͳ͍‣ ༷ॻ͕ແ͍ͳΒιʔεΛݟΕ͍͍͡Όͳ͍
ਖ਼ղͷ߹‣ ίϯςΩετ͕ҧ͑ਖ਼͍͠ࣄ͋Δ
࠷ۙͷྫ‣ NullReferenceͷྫ֎͕ͰͨΒnullνΣοΫ͢Ε͍͍͡Όͳ͍‣ ྫ֎͕ͰͨͳΒɺѲΓͭͿ͍͍ͤ͡Όͳ͍‣ ༷ॻ͕ແ͍ͳΒιʔεΛݟΕ͍͍͡Όͳ͍
࠷ۙͷྫ‣ NullReferenceͷྫ֎͕ͰͨΒnullνΣοΫ͢Ε͍͍͡Όͳ͍‣ ྫ֎͕ͰͨͳΒɺѲΓͭͿ͍͍ͤ͡Όͳ͍‣ ༷ॻ͕ແ͍ͳΒιʔεΛݟΕ͍͍͡Όͳ͍/VMMΛड͚ΔࣄΛఆ͍ͯ͠Δ߹˓
࠷ۙͷྫ‣ NullReferenceͷྫ֎͕ͰͨΒnullνΣοΫ͢Ε͍͍͡Όͳ͍‣ ྫ֎͕ͰͨͳΒɺѲΓͭͿ͍͍ͤ͡Όͳ͍‣ ༷ॻ͕ແ͍ͳΒιʔεΛݟΕ͍͍͡Όͳ͍/VMMΛड͚ΔࣄΛఆ͍ͯ͠Δ߹˓ผʹΒͤͨ͘ͳ͍ྫ֎˓
࠷ۙͷྫ‣ NullReferenceͷྫ֎͕ͰͨΒnullνΣοΫ͢Ε͍͍͡Όͳ͍‣ ྫ֎͕ͰͨͳΒɺѲΓͭͿ͍͍ͤ͡Όͳ͍‣ ༷ॻ͕ແ͍ͳΒιʔεΛݟΕ͍͍͡Όͳ͍/VMMΛड͚ΔࣄΛఆ͍ͯ͠Δ߹˓Α͋͘ΔผʹΒͤͨ͘ͳ͍ྫ֎˓
Ξϯτϫωοτઢ‣ ࢲͷΑ͏ͳ۪ຽʹແ͍৽ͨͳࢹ‣ ϗϯτͷͦΕྑ͍ͷʁ‣ ৭ʑͳ͔֯Β؍ͯΈΑ͏‣ Կࣄਖ਼͍͠໘ͱѱ͍໘͕͋Δ
ઈରѱ‣ ΈΜͳ͕ಡΊΔ͔Β༷ॻExcelͰॻ͚͍͍͡Όͳ͍‣ όʔδϣϯཧπʔϧΛΘͳ͍ͳΒɺมߋཤྺίϝϯτʹॻ͚͍͍͡Όͳ͍
ઈରѱ‣ ΈΜͳ͕ಡΊΔ͔Β༷ॻExcelͰॻ͚͍͍͡Όͳ͍‣ όʔδϣϯཧπʔϧΛΘͳ͍ͳΒɺมߋཤྺίϝϯτʹॻ͚͍͍͡Όͳ͍Ίͯ
ઈରѱ‣ ΈΜͳ͕ಡΊΔ͔Β༷ॻExcelͰॻ͚͍͍͡Όͳ͍‣ όʔδϣϯཧπʔϧΛΘͳ͍ͳΒɺมߋཤྺίϝϯτʹॻ͚͍͍͡Όͳ͍Ίͯͬͯ
৹ٞத‣ privateͳmethodʹinstance_evalͰΞΫηεͪ͠Ό͍͍͑͡Όͳ͍‣ Πϯελϯεมʹinstance_evalͰΞΫηεͪ͠Ό͍͍͑͡Όͳ͍
ۙͳྑ͍ྫ‣ ಢ͕ԕ͍ͳΒ܈അʹ͘Ε͍͍͡Όͳ͍
Ϗό‣ ϏόɾΞϯτϫωοτ
࠷ޙʹ‣ ϚϦʔ͚ͩʹΫϏΛΒΕͳ͍Α͏ʹ‣ ແࣄʹ2013ԼظΛܴ͍͑ͨͰ͢