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プロを目指す人の為のRuby入門を学んでつまずいたところ
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yoshihiroUeki
June 27, 2020
1
620
プロを目指す人の為のRuby入門を学んでつまずいたところ
どう理解しようとしたか発表します
yoshihiroUeki
June 27, 2020
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Transcript
ϓϩΛࢦ͢ਓͷͨΊͷ Rubyೖ (νΣϦʔຊ) ΛֶΜͰͭ·͍ͣͨͱ͜Ζ
ࣗݾհ ২ ٛ५ twitter @yoshihiroUeki ϑΟϤϧυϒʔτΩϟϯϓͰ ֶΜͰ·͢
͡Ίʹ
νΣϦʔຊಡΜͰ͍ͯͭ·͍ͣͯຊͱ ʹΒΊͬ͜͢Δࣄ͕͋Γɺ ͜͏Ώ͏ֶͼํΛ͢Εྑ͔ͬͨͳʔͬͱ ࢥͬͨࣄΛൃද͍ͨ͠ͱ͓͍·͢
ൃදͷྲྀΕ ͡Ίʹ ൃදͷྲྀΕͷઆ໌ ͭ·͍ͣͨॴͷઆ໌ ͜͏Ώ͏ֶͼํΛ͢Εྑ͔ͬͨࣄ:ରࡦᶃʙᶉ ·ͱΊ ࠓ͜͜
త νΣϦʔຊΛ͜Ε͔ΒಡΉਓ ࠓಡΜͰΔਓ ͏Ұ෮श͠Α͏ͱ͍ͯ͠Δਓ ಉ͡ॴͰͭ·͍͍ͮͯΔ͔Εͳ͍ͷͰڞ༗ ͠Α͏ͱࢥ͍·ͨ͠
ҙ RubyΛҰ௨ΓֶΜͰ͍Δ͔ͨಘΒ ΕΔࣄগͳ͍͔Ͱ͢
ͭ·͍ͣͨॴ 7ষ 7.4.3 ྫɿɹվࡳػϓϩάϥϜ
ൃදͷεϥΠυʹ͋Δίʔυʹ͍ͭͯ ϓϩΛࢦ͢ਓͷͨΊͷRubyೖͷ7ষɺ 7.4.3ɹྫɿվࡳػϓϩάϥϜͷίʔυΛҾ༻͍ͯ͠·͢ɻ
γφϦΦʁ
ӡ͕Γ͍ͯΔ͔Ͳ͏͔Λผ͢Δ 150ԁͷූΛߪೖ͢Δ കాͰೖ͠ɺࡾࠃͰग़͢Δ ظ͢ΔޮՌ:ग़Ͱ͖ͳ͍
ͦͯࣸ͠ܦ͠·ͨ͠
ຊॻʹ͋Δ γʔέϯεਤΛݟΔ
ࣸܦͨ͠ίʔυͱ γʔέϯεਤ ΈͯΘ͔Βͳ͍
ςετίʔυͰ ΤϥʔͰΔ
Ͳ͏͠Α͏ʙ
͚͕࣌ؒͩա͗Δ
͜͏Ώ͏ֶͼ͔ͨ ͢Εྑ͔ͬͨࣄ
ରࡦᶃ
·ͣຊΛ ࠷ޙ·Ͱ ಡΈΔ
ࣸܦͨ͠ίʔυͷ ޡΓʹؾ͚ͮΔ
ҰΜͰ͍ΔՕॴΛ ΕͯΈΔࣄͰ ؾ͚Δࣄ͕͋Δ
ରࡦᶄ
ࣗͰγʔέϯεਤ Λ͔͍ͯΈΔ
None
গͣͭ͠Πϝʔδ͕ ௫ΜͰ͘Δ
ରࡦᶅ
ίϝϯτ͢Δ
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None
Մಡੑ͋͛ΔͨΊʹ ίϝϯτ߇͚͑ͯͨ Ͳ
ਓʹݟͤͣʹ͕ࣗ ཧղ͢ΔҝͩͬͨΒ ͍͍͔
·ͩश͍ͨͯͷਓ
None
ରࡦᶆ
ෳͷίʔυΛ දࣔͤ͞Δ
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̍ͭ̍ͭ ϑΝΠϧΛ ։͍ͯͨ
None
None
None
Πϝʔδ͕ͭ ͔Ίͳ͍
ෳͷϑΝΠ ϧΛදࣔ
None
ෳදࣔ͢ࣄͰ Ѳ͍͢͠ʂ
ରࡦᶇ
γʔέϯεਤͱ ίʔυΛࢦ͞͠ͳ͕Β ૾্ͷਓʹΛͩ͠ͳ͕ Βઆ໌͢Δ
ࢦΛ͞͠ͳ͕Βઆ໌͢ ΔաఔͰ಄ͷத͕ཧ ͞ΕΔ
Կ͕ཧղͰ͖ͯͳ͍͔ ໌֬ʹͳΔ
ରࡦᶈ
ίʔυΛݱ࣮ੈք ʹӨͤ͞Δ
ྫ͑ͪ͜Βͷ ίʔυ
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umeda = Gate.new(:umeda) Ͱകా(umeda)ʹվࡳ͕Ͱ͖Δɻ ेࡾ(juso).newͰಉ͡Α͏ʹͰ͖ Δɻ Ticket.newͰ150ԁͷූΛߪೖ ͢Δɻ ͱ͍͏ྲྀΕͰݱ࣮ʹകా͔Βɺ ූΛങͬͯվࡳ௨ͯ͠ɺվࡳΛग़
ΔͱΠϝʔδͯ͠ΈΔɻ
खॻ͖Ͱॻ͍ͨ γʔέϯεਤ
None
ͱ
None
ίʔυΛݟൺͳ͕Β ૾ͯ͠ΈΔͱཧղ ͕ਐΉ
ରࡦऴΘΓ
ͦΕͰཧղᘳͰ ͢Ͷʁ
ͱݴΘΕΔͱࣗ৴ ͳ͍
͚ͲɺςΩετͱʹΒΊͬͯ͜͠ ͍ͨҎલͱൺΕཧղਐΜͩ ͱ͓͍·͢
·ͱΊ
৭ʑͳ͔֯Β ཧղ͢Δͷ େͩͱֶͼ·ͨ͠
ࣗҰਓͩͱ ৭ʑͳ͔֯Βཧղͷํ͢Δൃ ͜͜·Ͱੜ·Εͳ͔͔ͬͨͰ͢
ΞυόΠεΛ͘Εͨ ͕͍ؒͯ͘Εͯ ຊʹײँͰ͢
ऴΘΓ ͝ਗ਼ௌ͋Γ͕ͱ͏ ͍͟͝·ͨ͠