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FJORD BOOT CAMP
!LBLVUBOJ
AS A
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ࠓɺ͍͑ͨ͜ͱ
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ϕςϥϯͷݴ͏͜ͱͰड͚ͱΊΑ͏
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ԋश
ຊͷ͓ۀքྺҎ্ͷϕςϥϯ͕͓ಧ͚͍ͨ͠·͢
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֯୩৴ଠ
@kakutani
حൈͳཧʹڵฃ͕ͪ͠
झຯϝΧχΧϧΩʔϘʔυεΠονͷ५
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ൃച༧ఆɻࣗ৴࡞ɻ
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τʔΫޙͷ࣭ٙԠʹ͍ͭͯ
࣭Λ͖͔͚ͬʹͯ͠ϕςϥϯ͕ࣗͷݴ͍͍ͨ
͜ͱΛݴ͏͚ͩͳͷͰɺͳΜͰԕྀͤͣͲ͏ͧ
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ࠓɺ͍͑ͨ͜ͱ
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ϥζϕϦʔδϟϜ
ͷ๏ଇ
l͛Ε͛Δ΄Ͳബ͘ͳΔ
https://pxhere.com/en/photo/1150628
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l͛Ε͛Δ΄Ͳബ͘ͳΔ
w3VCZ3BJMTΛಈ͔͢ͷʹඞཁͳͭɻࠃ࢈ɻब৬ʹ༗ར
ɻ
wΞδϟΠϧٻਓථʹࡌͬͯΔͭ εΫϥϜͰ։ൃ͍ͯ͠·͢
ɻब৬ʹ༗རɻ
wΦʔϓϯιʔε(JU)VCʹ͋Δͭɻ׆ಈͰ͕ੜ͑Δɻब৬ʹ༗རɻ
wίϛϡχςΟΠϕϯτɻษڧձɻlΤϯδχΞzͷू·Γɻब৬ʹ༗རɻ
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ΠνΰδϟϜ
ͷ๏ଇ
lཻ͕͋ΕɺͲ͜·Ͱബ͘ͳΒͳ͍
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lཻ͕͋ΕɺͲ͜·Ͱബ͘ͳΒͳ͍
w3VCZίʔυͷ͜͏ʹਓ͕͍Δɻਓ͕ؒlͨͷ͍͠zϓϩάϥϛϯάɻ
wΞδϟΠϧίʔυͷ͜͏ʹਓ͕͍ΔɻιϑτΣΞΛιϑτΣΞͷΑ͏ʹͭ͘Δɻ
wΦʔϓϯιʔείʔυͷ͜͏ʹਓ͕͍ΔɻιϑτΣΞͷࣗ༝ɻ
wίϛϡχςΟίʔυͷ͜͏ʹਓ͕͍Δɻ͋ͳ͕ͨίϛϡχςΟͩɻ
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http://www.flickr.com/photos/alanstanton/5863143738/
l୯ʹੴΛΓग़͢߹Ͱɺ
ৗʹ৺ʹಊΛࢥ͍ඳ͔Ͷ
ͳΒͳ͍ɻ
ʕʕ࠾ੴ࡞ۀऀͷ৺ಘ
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࣌Λ͑ͨݐઃͷಓ
lݐொɺ࣌Λ͑ͨಓʹै͑ɺͦΕ͚ͩੜ͖ੜ͖
ͱͯ͘͠Δ͠ɺ·ͨͦΕ͕ͦ͜།ҰͷಓͰ͋Δɻ
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࣌Λ͑ͨݐઃͷಓ
ͦΕɺ΄͔ͳΒ͵ࢲࣗͷ໘͔Βடং͕ੜ·Εͯ
͘ΔΑ͏ͳϓϩηεͰ͋ΔɻͦΕۃΊΔಓͰͳ͘ɺ
ͳ͕͢··ʹ͓͚ͯ͠ɺ͓ͷ͔ͣΒੜ·Εͯ͘ΔಓͰ͋
Δɻ
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࣌Λ͑ͨϓϩάϥϛϯάͷಓ
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ϥϒϨεഢऋਓ
ΦʔΨελɾΤΠμɾΩϯά
ੈքͰ࠷ॳͷlϓϩάϥϚʔzɻ
ࢻతՊֶऀ ࣗশ
ɻ
ࢻਓόΠϩϯ།Ұͷग़ࢠɻ
όϕοδͷղੳػؔʹ͍ͭͯͷ
ஶ࡞ͰΒΕΔɻ
Augusta Ada King, Countess of Lovelace(1815-1852)
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— Augusta Ada King, Countess of Lovelace
lͨͱ͑ɺ͜Ε·ͰԻֶָͷԻཧ࡞ۂͰ͡ΒΕ
͖ͯͨԻ֊ͷجຊతͳߏΛɺͦͷΈ߹Θͤʹஔ͖
͑Δ͜ͱ͕Ͱ͖Εɺղੳػؔۂͷෳࡶ͞͞ΛΘ
ͣɺࡉີͰܥ౷తͳԻָ࡞Λ࡞ۂͰ͖ΔͰ͠ΐ͏ɻ
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lίϯϐϡʔλͱΠϯλʔωοτݱͷͻͱ͖Θॏཁͳൃ
໌ʹ͑ΒΕΔ͕ɺͩΕ͕࡞ͬͨͷ͔͋·ΓΒΕ͍ͯͳ
͍ɻʜͦ͏ͨ͠ਓͷνʔϜϫʔΫʹ͍ͭͯඳ͘͜ͱ͕ॏཁ
ͳͷɺνʔϜϫʔΫͷεΩϧͦ͜ΠϊϕʔγϣϯͷࠜװͰ
͋Δʜ͔Βͩɻʜσδλϧ࣌Λ࡞ͬͨίϥϘϨʔγϣϯ
ؒ ϐΞ
ͷ͍͚͋ͩͩͰͳ͘ɺੈؒͰൃੜͨ͠ɻʜ
ͦͯ͠ɺͳʹΑΓҹʹͬͨͷ͕ɺσδλϧ࣌ͷਅͷ
ੑɺܳज़ͱՊֶΛ݁ͼ͚ΒΕΔਓ͔Βੜ·Ε
͖ͯͨʜඒΛେͱߟ͑Δਓͨͪͩɻ
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lਓؒύλʔϯΛೝࣝ͠ɺͦͷඒΛѪͰΔɻใ͔Βޠ
ΛͭΉ͙ɻਓؒͱʜޠͦͷͷͳͷͩɻ
ਓؒͷੑʹɺՁ؍ɺҙࢤɺ৹ඒ؟ɺײɺݸͷҙࣝɺ
ಓಙ؍೦ͱ͍ͬͨͷ͕͔ܽͤͳ͍ɻ͍ͣΕɺܳज़ͱਓจ
Պֶ͕զʑʹڭ͑ͯ͘ΕΔͷͩɻܳज़ͱਓจՊֶ͕ɺࣗવ
ՊֶςΫϊϩδʔɺΤϯδχΞϦϯάɺֶͳͲʹྼΒͣ
ڭҭͷҰ؏ͱͯ͠ॏཁͳͷɺͦͷͨΊͩɻ
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lʜΠϊϕʔγϣϯΛੜΈग़͢ͷɺඒͱΤϯδχΞϦϯά
ΛɺਓؒੑͱςΫϊϩδʔΛɺͦͯ͠ࢻͱϓϩηοαʔΛ݁
ͼ͚Δ͜ͱͷͰ͖Δਓͩɻ
ਓจՊֶͱࣗવՊֶͷަࠩͰͳʹ͔Λͳ͛͠ΒΕΔΫϦ
Τʔλʔɺ྆ํͷඒʹؾ͔ͮͤͯ͘ΕΔ৽ͳڻ͖ͷײ֮
ηϯεɾΦϒɾϫϯμʔ
ΛΕͳ͍ࣗ༝ਓͱݴ͍͍ͬͯɻ
ͭ·ΓɺΤΠμɾϥϒϨεͷਫ਼ਆతͳޙܧऀͱ
ݺͿʹ;͞Θ͍͠ਓͩɻ
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օ͞Μ͕͍ͬͯΔιϑτΣΞ
ϋʔυΣΞ
Πϯλʔωοτʮ୭͔ʯ͕աڈʹ࡞ͬͨͷ
Ͱ͋Γɺదʹಈ࡞͠ଓ͚ΔΑ͏ʹʮ୭͔ʯ͕ҡ
͍࣋ͯ͠Δɻ͍·͍ͬͯΔύιίϯεϚϗͷ
ը໘ͷ͜͏ʹ͍Δͷਓؒͩɻ͋ͳͨͷੜΈग़
ͨ͠ίʔυ
ςΩετ
ը૾
Ի
ө૾σʔλ͜Ε
͔Βͷʮ୭͔ʯ͕৮ΕΔ͔͠Εͳ͍ɻ৮Εͳ͍
͔͠Εͳ͍ɻͦͷʮ୭͔ʯ͔ࣗ͠Εͳ͍
ࠓޙCPUΞϧΰϦζϜ͔͠Εͳ͍͚Ͳʜ
ɻ
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http://www.flickr.com/photos/alanstanton/5863143738/
l୯ʹੴΛΓग़͢߹Ͱɺ
ৗʹ৺ʹಊΛࢥ͍ඳ͔Ͷ
ͳΒͳ͍ɻ
ʕʕ࠾ੴ࡞ۀऀͷ৺ಘ
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࣌Λ͑ͨϓϩάϥϛϯάͷಓ
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w࣭
w
wಓ
wಓͷ֩৺
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࣭
l࣌Λ͑ͨಓΛٻΊΔͷɺ·ͣແ໊ͷ࣭ΛΒͶͳΒͳ͍ɻ
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ࣗ༝ͳ͍ͷͪͷً͖
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No content
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No content
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࣭
Quality
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No content
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৬ۀϓϩάϥϚʔͱͯ͠ͷl࣭z
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lϓϩάϥϚʔͱɺλεΫ
Λίʔυߦʹׂ͢ΔεΩ
ϧͷ͋Δਓͷ͜ͱΛࢦ͢ɻ
Robert C. Martin
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lϓϩάϥϚৄࡉͷཧऀͰ͋Δɻ
ͦΕ͕զʑͷࣄͩɻγεςϜͷৼΔ
͍ΛৄࡉʹܾΊΔɻ
ͦͷͨΊʹςΩετݴޠΛ͏ ͦΕ͕
ίʔυͩ
ɻ
Robert C. Martin
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http://www.flickr.com/photos/alanstanton/5863143738/
l୯ʹੴΛΓग़͢߹Ͱɺ
ৗʹ৺ʹಊΛࢥ͍ඳ͔Ͷ
ͳΒͳ͍ɻ
ʕʕ࠾ੴ࡞ۀऀͷ৺ಘ
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w࣭
w
wಓ
wಓͷ֩৺
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lແ໊ͷ࣭ʹ౸ୡ͢Δʹɺͦ͜ʹ௨͡Δͱͯ͠ɺੜ͖͍ͯΔύλ
ϯɾϥϯήʔδΛΈཱͯͶͳΒͳ͍ɻ
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http://www.flickr.com/photos/yukop/3659638918/
Gate
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No content
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l͋Δঢ়گԼͰͷΛ܁Γฦ͠ղܾ͍ͯ͠Δํ๏ʹ
໊લΛ͚ͨઆ໌͕ύλʔϯͰ͢ɻ
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w࣭
w
wಓ
wಓͷ֩৺
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lΛݐͯΕɺͦΕΛ͙ͬͯ࣌͘Λ͑ͨಓΛ࣮ફ͍ͯ͘͜͠ͱ͕
Ͱ͖Δɻ
ಓ
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lཻ͕͋ΕɺͲ͜·Ͱബ͘ͳΒͳ͍
w3VCZίʔυͷ͜͏ʹਓ͕͍Δɻਓ͕ؒlͨͷ͍͠zϓϩάϥϛϯάɻ
wΞδϟΠϧίʔυͷ͜͏ʹਓ͕͍ΔɻιϑτΣΞΛιϑτΣΞͷΑ͏ʹͭ͘Δɻ
wΦʔϓϯιʔείʔυͷ͜͏ʹਓ͕͍ΔɻιϑτΣΞͷࣗ༝ɻ
wίϛϡχςΟίʔυͷ͜͏ʹਓ͕͍Δɻ͋ͳ͕ͨίϛϡχςΟͩɻ
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lཻ͕͋ΕɺͲ͜·Ͱബ͘ͳΒͳ͍
w3VCZίʔυͷ͜͏ʹਓ͕͍Δɻਓ͕ؒlͨͷ͍͠zϓϩάϥϛϯάɻ
wΞδϟΠϧίʔυͷ͜͏ʹਓ͕͍ΔɻιϑτΣΞΛιϑτΣΞͷΑ͏ʹͭ͘Δɻ
wΦʔϓϯιʔείʔυͷ͜͏ʹਓ͕͍ΔɻιϑτΣΞͷࣗ༝ɻ
wίϛϡχςΟίʔυͷ͜͏ʹਓ͕͍Δɻ͋ͳ͕ͨίϛϡχςΟͩɻ
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Ruby
“The State of the Octoverse”, Top languages section, GitHub
https://octoverse.github.com/#top-languages
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Ruby
3.0
IS COMING!
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l3VCZͷ͍͢͝ͱ͜ΖɺݴޠͷಛΛ
ʮͨͷ͍͠ʯͱݴ͍ͬͯ͠·ͬͨ͜ͱɻ
ݪ৴Ұ
ͱͪ͗3VCZձٞ
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ΦϒδΣΫτࢦͱ
wΞΠσϯςΟςΟΛ࣋ͭ
ଘࡏΛಛఆͰ͖Δ ͻͱͭͻͱ͕ͭΦϒδΣΫτ
wϝοηʔδΛͤΔ
ΦϒδΣΫτͷlϝιουzʹҾΛͯ͠ϝοηʔδΛૹ৴Ͱ͖Δ
ੲɺ.BU[ͷஶ࡞ͰಡΜͩ͜ͱΛهԱΛཔΓʹॻ͍͍ͯΔΑɻਖ਼֬ͳઆ໌͡Όͳ͍͔͠Εͳ͍͠ɺ
·ͭͱ͞Μͷઆ໌ͷํมΘ͍ͬͯΔ͔͠Εͳ͍Αɻ͋͘·ͰLBLVUBOJͷղऍͱཧղͩΑɻ
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Πϯλʔωοτੜ໋Λͨ͠
lະདྷΛ࡞Δzϓϩάϥϛϯά
@sumim
lΦϒδΣΫτࢦͱԿͰ͔͢ʁzͰάάͬͯΈΑ͏2
ΦϒδΣΫτࢦͱԿͰ͔͢ʁ
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ͪΐͬͱ3VCZΛॻ͍ͯΈΑ͏͔ɻ༷
wϘʔφεͷֹۚΛࢉग़͢ΔΑ
͜ΕՍۭͷྫͰ͋Γ࣮ࡏͷਓஂମͱ SZ
wڅ༩άϨʔυ͝ͱʹج४ֹ͕ۚ͋ΔΑ
4ϥϯΫ ສԁ
"ϥϯΫ ສԁ
#ϥϯΫ ສԁ
wύϑΥʔϚϯεϨϏϡʔͷ݁ՌͰϘʔφε૿ݮ͢Δ
༏ल ສԁϓϥε
;ͭ͏ Մࢉͳ͠
೦ ϚΠφεʜ
આ໌༻ͷίʔυ͔ͩΒɺ͜Ε͕ʮਖ਼͍͠ʯॻ͖ํ͡Ό͋ͳ͍Α
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require_relative 'fjord_works'
RSpec.describe 'ϘʔφεΛܭࢉ͢ΔΑ!!' do
context 'komagata͞ΜͷάϨʔυB(ϕʔε100ສԁ)Ͱ' do
komagata = Person.new(name:'komagata', grade: :B)
context 'ධՁ͕༏ल(+50ສԁ)ͷͱ͖' do
bonus = Bonus.new(komagata, review: :excellent)
check = bonus.call
example 'Ϙʔφε150ສԁ' do
expect(check).to eq(150)
context 'machida͞ΜͷάϨʔυA(ϕʔε͕120ສԁ)Ͱ' do
machida = Person.new(name:'machida', grade: :A)
context 'ධՁ͕;ͭ͏(Մࢉͳ͠)ͷͱ͖' do
bonus = Bonus.new(machida, review: :standard)
check = bonus.call
example 'Ϙʔφε120ສԁ' do
expect(check).to eq(120)
context 'kakutaniͷάϨʔυS(ϕʔε͕160ສԁ)Ͱ' do
kakutani = Person.new(name:'kakutani', grade: :S)
context 'ධՁ͕೦(2ׂݮ)ͷͱ͖' do
bonus = Bonus.new(kakutani, review: :poor)
check = bonus.call
example 'Ϙʔφε128ສԁ' do
expect(check).to eq(128)
ennnnnd
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❯ rspec -fd fjord_works_spec.rb
ϘʔφεΛܭࢉ͢ΔΑ!!
komagata͞ΜͷάϨʔυB(ϕʔε100ສԁ)Ͱ
ධՁ͕༏ल(+50ສԁ)ͷͱ͖
Ϙʔφε150ສԁ
machida͞ΜͷάϨʔυA(ϕʔε͕120ສԁ)Ͱ
ධՁ͕;ͭ͏(Մࢉͳ͠)ͷͱ͖
Ϙʔφε120ສԁ
kakutaniͷάϨʔυS(ϕʔε͕160ສԁ)Ͱ
ධՁ͕೦(2ׂݮ)ͷͱ͖
Ϙʔφε128ສԁ
Finished in 0.00239 seconds (files took 0.2104 seconds to load)
3 examples, 0 failures
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class Person
attr_reader :name, :grade
def initialize(name:, grade:)
@name, @grade = name, grade
end
end
class Bonus
attr_reader :person, :review
def initialize(person, review:)
@person, @review = person, review
end
# Ϙʔφε: άϨʔυ͝ͱͷϕʔεֹۚΛධՁʹΑͬͯ૿ݮֹͤͨۚ͞
def call
case (g = @person.grade)
when :S
base = 160
apply_review(base)
when :A
base = 120
apply_review(base)
when :B
base = 100
apply_review(base)
else
raise "No such grade: '#{g}'"
end
end
private
def apply_review(base)
case @review
when :excellent
base + 50
when :standard
base
when :poor
base * 0.8
else
raise "Nu such review: '#{@review}'"
end
end
end
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class Person
attr_reader :name, :grade
def initialize(name:, grade:)
@name, @grade = name, grade
end
end
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class Bonus
attr_reader :person, :review
def initialize(person, review:)
@person, @review = person, review
end
# Ϙʔφε: άϨʔυ͝ͱͷϕʔεֹۚΛධՁʹΑͬͯ૿ݮֹͤͨۚ͞
def call
case (g = @person.grade)
when :S
base = 160
apply_review(base)
when :A
base = 120
apply_review(base)
when :B
base = 100
apply_review(base)
else
raise "No such grade: '#{g}'"
end
end
private
def apply_review(base)
case @review
when :excellent
base + 50
when :standard
base
when :poor
base * 0.8
else
raise "Nu such review: '#{@review}'"
end
end
end
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l5FMM
%PO`U"TL
https://martinfowler.com/bliki/TellDontAsk.html
μϒϧσΟεύον ,FOU#FDL͕Ίͨ
ͷઆ໌͔͚ͨͬͨ͠ͲࠓׂѪͩ
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class Bonus
attr_reader :person, :review
def initialize(person, review:)
@person, @review = person, review
end
# Ϙʔφε: άϨʔυ͝ͱͷϕʔεֹۚΛධՁʹΑͬͯ૿ݮֹͤͨۚ͞
def call
case (g = @person.grade)
when :S
base = 160
apply_review(base)
when :A
base = 120
apply_review(base)
when :B
base = 100
apply_review(base)
else
raise "No such grade: '#{g}'"
end
end
private
def apply_review(base)
case @review
when :excellent
base + 50
when :standard
base
when :poor
base * 0.8
else
raise "Nu such review: '#{@review}'"
end
end
end
άϨʔυΛQFSTPOʹਘͶͯ BTL
ɺ
ج४ֹۚΛఆ͍ͯ͠Δ
ϨϏϡʔͷఆ༰ΛਘͶͯ BTL
ɺ
ϘʔφεΛ૿ݮ͍ͤͯ͞Δ
#POVT͕άϨʔυϨϏϡʔʹ
ฉ͖·Θͬͯࣄ͍ͯ͠Δ BTL
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Grade = Struct.new(:sym, :base)
GRADES = [
Grade.new(:S, 160),
Grade.new(:A, 120),
Grade.new(:B, 100)
].each_with_object({}){|g,h| h[g.sym] = g }.freeze
class Person
attr_reader :name, :grade
def initialize(name:, grade:)
@name, @grade = name, GRADES[grade]
end
end
class Review
class Excellent < Review
def call(base) base + 50 end
end
class Standard < Review
def call(base) base end
end
class Poor < Review
def call(base) base * 0.8 end
end
def self.of(sym)
@_types ||= {
excellent: Excellent.new,
standard: Standard.new,
poor: Poor.new
}
@_types[sym]
end
def call(base); end
end
class Bonus
attr_reader :person, :review
def initialize(person, review:)
@person, @review = person, Review.of(review)
end
# Ϙʔφε: άϨʔυ͝ͱͷϕʔεֹۚΛධՁʹΑͬͯ૿ݮֹͤͨۚ͞
def call
@person.grade.base.then {|b| @review.call(b)}
end
end
QFSTPOͷάϨʔυ͝ͱͷج४ֹۚΛɺ
ϨϏϡʔ݁Ռʹͯ͠ɺϘʔφεΛࢉग़͠
͍ͯΔ UFMM
#POVTάϨʔυͱϨϏϡʔʹ
ࣄΛ͓ئ͍͍ͯ͠Δ UFMM
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class Bonus
attr_reader :person, :review
def initialize(person, review:)
@person, @review = person, Review.of(review)
end
# Ϙʔφε: άϨʔυ͝ͱͷϕʔεֹۚΛධՁʹΑͬͯ૿ݮֹͤͨۚ͞
def call
@person.grade.base.then {|b| @review.call(b)}
end
end
QFSTPOͷάϨʔυ͝ͱͷج४ֹۚΛɺ
ϨϏϡʔ݁Ռʹͯ͠ɺϘʔφεΛࢉग़͍ͯ͠Δ UFMM
#POVTάϨʔυͱϨϏϡʔʹ
ࣄΛ͓ئ͍͍ͯ͠Δ UFMM
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class Bonus
attr_reader :person, :review
def initialize(person, review:)
@person, @review = person, Review.of(review)
end
# Ϙʔφε: άϨʔυ͝ͱͷϕʔεֹۚΛධՁʹΑͬͯ૿ݮֹͤͨۚ͞
def call
@review.call(@person.grade.base)
end
end
ͪΖΜɺ͜ΕͰߏΘͳ͍
#POVTάϨʔυͱϨϏϡʔʹ
ࣄΛ͓ئ͍͍ͯ͠Δ UFMM
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class Bonus
attr_reader :person, :review
def initialize(person, review:)
@person, @review = person, Review.of(review)
end
# Ϙʔφε: άϨʔυ͝ͱͷϕʔεֹۚΛධՁʹΑͬͯ૿ݮֹͤͨۚ͞
def call
@person.grade.base.then {|b| @review.call(b)}
end
end
lͦͷਓͷάϨʔυʹɺϨϏϡʔΛద༻ͨ݁͠Ռ͕
ϘʔφεͩΑz
#POVTάϨʔυͱϨϏϡʔʹ
ࣄΛ͓ئ͍͍ͯ͠Δ UFMM
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lҙਤΛ͋ΒΘ໊͢લ
https://wiki.c2.com/?IntentionRevealingNames
DDPNͷϠό͞ʹ͍ͭͯʰύλʔϯ
8JLJ
91ʱΛಡΜͰ͘ΕͨͷΉ
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Grade = Struct.new(:sym, :base)
GRADES = [
Grade.new(:S, 160),
Grade.new(:A, 120),
Grade.new(:B, 100)
].each_with_object({}){|g,h| h[g.sym] = g }.freeze
class Person
attr_reader :name, :grade
def initialize(name:, grade:)
@name, @grade = name, GRADES[grade]
end
end
class Review
class Excellent < Review
def call(base) base + 50 end
end
class Standard < Review
def call(base) base end
end
class Poor < Review
def call(base) base * 0.8 end
end
def self.of(sym)
@_types ||= {
excellent: Excellent.new,
standard: Standard.new,
poor: Poor.new
}
@_types[sym]
end
def call(base); end
end
#POVTάϨʔυͱϨϏϡʔʹ
ࣄΛ͓ئ͍͍ͯ͠Δ UFMM
Slide 78
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Grade = Struct.new(:sym, :base)
GRADES = [
Grade.new(:S, 160),
Grade.new(:A, 120),
Grade.new(:B, 100)
].each_with_object({}){|g,h| h[g.sym] = g }.freeze
class Person
attr_reader :name, :grade
def initialize(name:, grade:)
@name, @grade = name, GRADES[grade]
end
end
άϨʔυ͕4ZNCPM͔Βج४ۚ
ֹΛ࣋ͬͨ4USVDUʹͳͬͨ
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class Review
class Excellent < Review
def call(base) base + 50 end
end
class Standard < Review
def call(base) base end
end
class Poor < Review
def call(base) base * 0.8 end
end
def self.of(sym)
@_types ||= {
excellent: Excellent.new,
standard: Standard.new,
poor: Poor.new
}
@_types[sym]
end
def call(base); end
end
class Bonus
attr_reader :person, :review
def initialize(person, review:)
@person, @review = person, Review.of(review)
end
ϨϏϡʔ4ZNCPM͔ΒৼΔ
͍Λͬͨ3FWJFXΫϥεͷΦ
ϒδΣΫτʹͳͬͨ
ϘʔφεΛݺͼग़͢ଆͲͷϨϏϡʔ݁Ռͳͷ͔
4ZNCPMͰࢦఆ͢Δ ΠϯλʔϑΣΠεมΘΒͳ͍
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…
context 'komagata͞ΜͷάϨʔυB(ϕʔε100ສԁ)Ͱ' do
komagata = Person.new(name:'komagata', grade: :B)
context 'ධՁ͕༏ल(+50ສԁ)ͷͱ͖' do
bonus = Bonus.new(komagata, review: :excellent)
check = bonus.call
example 'Ϙʔφε150ສԁ' do
expect(check).to eq(150)
…
ৼΔ͍มΘΒͳ͍ͷͰɺςετίʔυมΘΒͳ͍
ʘϦϑΝΫλϦϯάʗ
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͔͜͜Β͓·͚
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ॏෳΛݮΒͤͳ͍͔
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class Review
class Excellent < Review
def call(base) base + 50 end
end
class Standard < Review
def call(base) base end
end
class Poor < Review
def call(base) base * 0.8 end
end
def self.of(sym)
@_types ||= {
excellent: Excellent.new,
standard: Standard.new,
poor: Poor.new
}
@_types[sym]
end
def call(base); end
end
&YDFMMFOU
4UBOEBSE
1PPS
ͱճॻ͍ͯͯɺྔͷΘΓ
ʹใྔ͕গͳ͍ͷͰ
ݸਓͷײͰ͢
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Review = Struct.new(:sym, :apply)
REVIEWS = [
Review.new(:excellent, ->(base){ base + 50}),
Review.new(:standard, ->(base){ base }),
Review.new(:poor, ->(base){ base * 0.8 })
].each_with_object({}){|r,h| h[r.sym] = r }.freeze
class Bonus
attr_reader :person, :review
def initialize(person, review:)
@person, @review = person, REVIEWS[review]
end
# Ϙʔφε: άϨʔυ͝ͱͷϕʔεֹۚΛධՁʹΑͬͯ૿ݮֹͤͨۚ͞
def call
@person.grade.base.then {|b| @review.apply.(b) }
end
…
खଓ͖ΛΦϒδΣΫτʹͨ݁͠Ռɺσʔλ͚ͩʹͳͬͨͷͰ4USVDUͷΠϯελϯεʹͯ͠Έͨɻ
ϨϏϡʔ݁Ռͷ໊લճ͔͠ग़ͯ͜ͳ͍ɻ3VCZΜΓ
3FWJFXͷ"SSBZΛ3FWJFXͷγϯϘϧΛΩʔʹͨ͠3FWJFXͷ)BTIʹͯ͋͠Δ
͔Β4ZNCPMͰ3FWJFXΛબΔɻ3VCZΜΓ
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-BXPG%FNFUFSσϝςϧͷᎄ
w ͋ΔΦϒδΣΫτͷಛఆϝιου্ͰݺΜͰ͍͍ͷ
wࣗ͡͠Μ
wͦͷϝιουͷҾͰ͖ͬͯͨΦϒδΣΫτ
wͦͷϝιου͕ࣗͰΠϯελϯεԽͨ͠ΦϒδΣΫτ
wͦͷΦϒδΣΫτΛߏ͢ΔΦϒδΣΫτ
https://ja.wikipedia.org/wiki/%E3%83%87%E3%83%A1%E3%83%86%E3%83%AB%E3%81%AE%E6%B3%95%E5%89%87
͕ࣗΒͳ͍ΦϒδΣΫτʹ͔͚͠Δͳ %PO`UUBMLUPTUSBOHFST
ͱ͍͏ᎄͩΑɻ
ʮσϝςϧͷ๏ଇʯͱ͍͏ͷ͕ఆ༁͚ͩͲɺ๏ଇͱ͍͏ΑΓɺΦϒδΣΫτࢦϓϩ
άϥϛϯάͷమଇͱ͍͏ײͩ͡ͱࢥ͏͔ΒɺࢲʮᎄʯͱݺͿΑ
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❯ git diff
diff --git a/fjord_works.rb b/fjord_works.rb
index acb07f1..62f38e1 100644
--- a/fjord_works.rb
+++ b/fjord_works.rb
@@ -6,11 +6,13 @@ GRADES = [
].each_with_object({}){|g,h| h[g.sym] = g }.freeze
class Person
- attr_reader :name, :grade
+ attr_reader :name
def initialize(name:, grade:)
@name, @grade = name, GRADES[grade]
end
+
+ def base_salary; @grade.base end
end
Review = Struct.new(:sym, :apply)
@@ -28,6 +30,6 @@ class Bonus
# Ϙʔφε: άϨʔυ͝ͱͷϕʔεֹۚΛධՁʹΑͬͯ૿ݮֹͤͨۚ͞
def call
- @person.grade.base.then {|b| @review.apply(b)}
+ @person.base_salary.then {|b| @review.apply.(b)}
end
end
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Review = Struct.new(:sym, :apply)
REVIEWS = [
Review.new(:excellent, ->(base){ base + 50}),
Review.new(:standard, ->(base){ base }),
Review.new(:poor, ->(base){ base * 0.8 })
].each_with_object({}){|r,h| h[r.sym] = r }.freeze
class Bonus
attr_reader :person, :review
def initialize(person, review:)
@person, @review = person, REVIEWS[review]
end
# Ϙʔφε: άϨʔυ͝ͱͷϕʔεֹۚΛධՁʹΑͬͯ૿ݮֹͤͨۚ͞
def call
@person.base_salary.then {|b| @review.apply.(b) }
end
…
ਓؒͷج४ֹۚʹϨϏϡʔ݁ՌΛద༻ͨ͠ͷ͕Ϙʔφε
Slide 88
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class Bonus
attr_reader :person, :review
def initialize(person, review:)
@person, @review = person, review
end
# Ϙʔφε: άϨʔυ͝ͱͷϕʔεֹۚΛධՁʹΑͬͯ૿ݮֹͤͨۚ͞
def call
case (g = @person.grade)
when :S
base = 160
apply_review(base)
when :A
base = 120
apply_review(base)
when :B
base = 100
apply_review(base)
else
raise "No such grade: '#{g}'"
end
end
private
def apply_review(base)
case @review
when :excellent
base + 50
when :standard
base
when :poor
base * 0.8
else
raise "Nu such review: '#{@review}'"
end
end
end
#POVT͕άϨʔυϨϏϡʔʹ
ฉ͖·Θͬͯࣄ͍ͯ͠Δ BTL
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3VCZͨͷ͍͠2
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l5FMM
%PO`U"TL
https://martinfowler.com/bliki/TellDontAsk.html
μϒϧσΟεύον ,FOU#FDL͕Ίͨ
ͷઆ໌͔͚ͨͬͨ͠ͲࠓׂѪͩ
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Πϯλʔωοτੜ໋Λͨ͠
lະདྷΛ࡞Δzϓϩάϥϛϯά
@sumim
lΦϒδΣΫτࢦͱԿͰ͔͢ʁzͰάάͬͯΈΑ͏2
ΦϒδΣΫτࢦͱԿͰ͔͢ʁ
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https://eng.uber.com/microservice-architecture/
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http://jeffsutherland.com/oopsla/schwapub.pdf
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http://jeffsutherland.com/oopsla/schwapub.pdf
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https://www.slideshare.net/kdmsnr/20140214-teamgeekfearlesschange
l5FBN(FFLʹΑΔ'FBSMFTT$IBOHFz
֯య
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lιϑτΣΞ։ൃνʔϜεϙʔπͰ͋Δ
wݠڏ )VMJMJUZ
ੈքͷத৺܅Ͱͳ͍ɻ܅શશೳͰͳ͍͠ɺઈରʹਖ਼͍͠Θ͚Ͱͳ͍ɻৗʹࣗΛ
վળ͍ͯ͜͠͏ɻ
wଚܟ 3FTQFDU
Ұॹʹಇ͘ਓͷ͜ͱΛ৺͔Βࢥ͍Ζ͏ɻ૬खΛਓͷਓؒͱͯ͠ѻ͍ɺͦͷೳྗޭΛߴ
͘ධՁ͠Α͏ɻ
w৴པ 5SVTU
ࣗҎ֎ͷਓ༗ೳͰ͋Γɺਖ਼͍͜͠ͱΛ͢Δͱ৴͡Α͏ɻͦ͏͢ΕɺࣄΛ
ͤΔ͜ͱ͕Ͱ͖Δɻ
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l͋ΒΏΔਓؒؔͷিಥɺ
ݠڏɾଚܟɾ৴པͷܽʹΑΔͷͩ
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ࠓɺ͍͑ͨ͜ͱ
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lࣗͷؾ࣋ͪΛਖ਼͘͠දݱ͢Δ
͚ΜͪΌΜ͘Μ͞ΜͷWebه, https://diary.shu-cream.net/2020/07/06/01.html
wʮࣾձਓࣗͷؾ͕࣋ͪਖ਼͘͠දݱͰ͖ͨΒेʯͱʜݴΘΕͨʜʢଟ
!LBLVUBOJ͔!LPJD͋ͨΓͩͱࢥ͏
wࣗͷײ͔ࣗ͠Θ͔Βͳ͍ͷͰɺͦΕʹ͖߹͍ɺݴ༿ʹ͢Δ܇࿅͕ඞཁ
wײ͕දݱͰ͖ΔΑ͏ʹͳͬͨΒɺ࣍ͷεςοϓݴ༿ จষ
ͷղ૾Λ্͛Δ
wޠኮΛ૿͠ɺݴ༿ͷղ૾Λ্͛Δ͜ͱͰɺࣗͷײΛΑΓਖ਼͘͠දݱͰ͖
ΔΑ͏ʹͳΓ·͢ɻʜΑΓਖ਼ࣗ͘͠ͷײΛड͚औͬͯΒ͏͜ͱ͕Ͱ͖ΔΑ
͏ʹͳΔ
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w͍·ͷؾ࣋ͪ ײ
͋ͳ͕ͨॻ͔ͳ͚Ε୭ʹΘΒͳ͍ɻl૬खʹΘΔΑ͏ʹzςΩετͰॻ͘ʹ܇࿅͕ඞཁͩɻ
wͬͨ͜ͱ ࣄ࣮
ࠓҰ͕Μͬͨৄ͘͠ॻ͖͍ͨͩΖ͏͚ͲɺΈΜͳৄࡉΛಡΈ͍͔ͨͳ
wΘ͔ͬͨ͜ͱ ҙݟ
ղऍ
ͪΖΜɺײҎ֎దʹΘΔΑ͏ʹςΩετग़ྗ͢Δʹ܇࿅ɺ܇࿅ɺ܇࿅ɻ
w࣍ʹΔ͜ͱ ܭը
ද໌
ߟ͑Δ͜ͱେࣄ͚ͩΕͲɺ໌ͷࣗͷஔ͖खࢴ ໌ͷࣗʹదʹΘΔΑ͏ʹॻ͚Δ͔ͳ
wγϟτΞτ ײँ
νʔϜʹײँɻؒʹײँɻΑ͍ৼΔ͍ɺॿ͔ͬͨ͜ͱΛϑΟʔυόοΫͯ͠૿͑ͨΒ͏Ε͘͠ͳ͍
lใzͲ͜ʹྗΛೖΕͯॻ͘ͷ͕Α͍͔
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lཻ͕͋ΕɺͲ͜·Ͱബ͘ͳΒͳ͍
w3VCZίʔυͷ͜͏ʹਓ͕͍Δɻਓ͕ؒlͨͷ͍͠zϓϩάϥϛϯάɻ
wΞδϟΠϧίʔυͷ͜͏ʹਓ͕͍ΔɻιϑτΣΞΛιϑτΣΞͷΑ͏ʹͭ͘Δɻ
wΦʔϓϯιʔείʔυͷ͜͏ʹਓ͕͍ΔɻιϑτΣΞͷࣗ༝ɻ
wίϛϡχςΟίʔυͷ͜͏ʹਓ͕͍Δɻ͋ͳ͕ͨίϛϡχςΟͩɻ
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lཻ͕͋ΕɺͲ͜·Ͱബ͘ͳΒͳ͍
w3VCZίʔυͷ͜͏ʹਓ͕͍Δɻਓ͕ؒlͨͷ͍͠zϓϩάϥϛϯάɻ
wΞδϟΠϧίʔυͷ͜͏ʹਓ͕͍ΔɻιϑτΣΞΛιϑτΣΞͷΑ͏ʹͭ͘Δɻ
wΦʔϓϯιʔείʔυͷ͜͏ʹਓ͕͍ΔɻιϑτΣΞͷࣗ༝ɻ
wίϛϡχςΟίʔυͷ͜͏ʹਓ͕͍Δɻ͋ͳ͕ͨίϛϡχςΟͩɻ
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ίϛϡχςΟͷ
ҰһʹͳΔ
https://skymapglobal.com/smart-transportation/funny-indian-train-transportation-picture/
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At RubyKaigi 2011, taken by recmpile_net
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http://www.flickr.com/photos/recompile_net/4932459606/
lίϛϡχςΟͱ୭͔ɻͪΖΜɺ
͋ͳͨͷ͜ͱͩɻ͋ͳ͕ͨίϛϡχ
ςΟͰ͋Γɺ ͦΕҎ֎ʹίϛϡχ
ςΟ͍ͳ͍ɻ͋ͳͨͷΑ͏ͳਓʑͷ
ू·ΓΛɺίϛϡχςΟͱݺͿͷͩ
ߴڮٛ
3VCZJTU.BHB[JOF߸ר಄ݴ
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l8FGPDVTPOUIFQFPQMFCFIJOE$0%&
— Akira Matsuda, RubyKaigi 2019 (Paraphrased)
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͜Ε͔Βl*5ۀքzͰಇ͘͜ͱʹͳΔͷͳΒɺձ
ࣾ๏ਓΑΓࣗͷΩϟϦΞͷ΄͏͕ण໋͕
͍͔͠Εͳ͍͜ͱΛ಄ͷย۱ʹஔ͍͓͍ͯ
ͯ΄͍͠ɻਓձࣾΛࣙΊΔ͕ɺ༷͟·ͳί
ϛϡχςΟΛ௨ͯ͡ަྲྀ͕ଓ͘ ܧଓతɾஅଓ
త
͜ͱ͋Δɻ৫ͱݸਓ͚ͯߟ͑ΒΕ
ΔΑ͏ʹͳΔͱΑ͍Ͱ͢Ͷɻ৫ͷঢ়گ͕ݸਓ
ͷৼΔ͍ΛܾΊΔ͜ͱ͋Δ͔Βɺͳ͔ͳ͔
Ή͔͍ͣ͜͠ͱଟ͍Ͱ͚͢ΕͲɻ
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No content
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No content
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lཻ͕͋ΕɺͲ͜·Ͱബ͘ͳΒͳ͍
w3VCZίʔυͷ͜͏ʹਓ͕͍Δɻਓ͕ؒlͨͷ͍͠zϓϩάϥϛϯάɻ
wΞδϟΠϧίʔυͷ͜͏ʹਓ͕͍ΔɻιϑτΣΞΛιϑτΣΞͷΑ͏ʹͭ͘Δɻ
wΦʔϓϯιʔείʔυͷ͜͏ʹਓ͕͍ΔɻιϑτΣΞͷࣗ༝ɻ
wίϛϡχςΟίʔυͷ͜͏ʹਓ͕͍Δɻ͋ͳ͕ͨίϛϡχςΟͩɻ
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w࣭
w
wಓ
wಓͷ֩৺
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l͜͜ʹࢸͬͯɺ࣌Λ͑ͨಓ·ͩશͰͳ͍ɻΛޙʹͯ͠
าΈग़͞ͳ͚Εɺແ໊ͷ࣭Λेʹੜ͢Δ͜ͱͰ͖ͳ͍ɻ
ಓͷ֩৺
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ίϛϡχςΟͷ
ҰһʹͳΔ
https://skymapglobal.com/smart-transportation/funny-indian-train-transportation-picture/
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ϥζϕϦʔδϟϜ
ͷ๏ଇ
l͛Ε͛Δ΄Ͳബ͘ͳΔ
https://pxhere.com/en/photo/1150628
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l͛Ε͛Δ΄Ͳബ͘ͳΔ
w3VCZ3BJMTΛಈ͔͢ͷʹඞཁͳͭɻࠃ࢈ɻlब৬ʹ༗ར
ɻ
wΞδϟΠϧٻਓථʹࡌͬͯΔͭ εΫϥϜͰ։ൃ͍ͯ͠·͢
ɻब৬ʹ༗རɻ
wΦʔϓϯιʔε(JU)VCʹ͋Δͭɻ׆ಈͰ͕ੜ͑Δɻब৬ʹ༗རɻ
wίϛϡχςΟΠϕϯτɻษڧձɻlΤϯδχΞzͷू·Γɻब৬ʹ༗རɻ
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ΠνΰδϟϜ
ͷ๏ଇ
lཻ͕͋ΕɺͲ͜·Ͱബ͘ͳΒͳ͍
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lཻ͕͋ΕɺͲ͜·Ͱബ͘ͳΒͳ͍
w3VCZίʔυͷ͜͏ʹਓ͕͍Δɻਓ͕ؒlͨͷ͍͠zϓϩάϥϛϯάɻ
wΞδϟΠϧίʔυͷ͜͏ʹਓ͕͍ΔɻιϑτΣΞΛιϑτΣΞͷΑ͏ʹͭ͘Δɻ
wΦʔϓϯιʔείʔυͷ͜͏ʹਓ͕͍ΔɻιϑτΣΞͷࣗ༝ɻ
wίϛϡχςΟίʔυͷ͜͏ʹਓ͕͍Δɻ͋ͳ͕ͨίϛϡχςΟͩɻ
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http://www.flickr.com/photos/alanstanton/5863143738/
l୯ʹੴΛΓग़͢߹Ͱɺ
ৗʹ৺ʹಊΛࢥ͍ඳ͔Ͷ
ͳΒͳ͍ɻ
ʕʕ࠾ੴ࡞ۀऀͷ৺ಘ
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࣌Λ͑ͨϓϩάϥϛϯάͷಓ
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࣌Λ͑ͨݐઃͷಓ
ͦΕɺ΄͔ͳΒ͵ࢲࣗͷ໘͔Βடং͕ੜ·Εͯ
͘ΔΑ͏ͳϓϩηεͰ͋ΔɻͦΕۃΊΔಓͰͳ͘ɺ
ͳ͕͢··ʹ͓͚ͯ͠ɺ͓ͷ͔ͣΒੜ·Εͯ͘ΔಓͰ͋
Δɻ
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օ͞Μ͕͍ͬͯΔιϑτΣΞ
ϋʔυΣΞ
Πϯλʔωοτʮ୭͔ʯ͕աڈʹ࡞ͬͨͷ
Ͱ͋Γɺదʹಈ࡞͠ଓ͚ΔΑ͏ʹʮ୭͔ʯ͕ҡ
͍࣋ͯ͠Δɻ͍·͍ͬͯΔύιίϯεϚϗͷ
ը໘ͷ͜͏ʹ͍Δͷਓؒͩɻ͋ͳͨͷੜΈग़
ͨ͠ίʔυ
ςΩετ
ը૾
Ի
ө૾σʔλ͜Ε
͔Βͷʮ୭͔ʯ͕৮ΕΔ͔͠Εͳ͍ɻ৮Εͳ͍
͔͠Εͳ͍ɻͦͷʮ୭͔ʯ͔ࣗ͠Εͳ͍
ࠓޙCPUΞϧΰϦζϜ͔͠Εͳ͍͚Ͳʜ
ɻ
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l͋Δঢ়گԼͰͷΛ܁Γฦ͠ղܾ͍ͯ͠Δํ๏ʹ
໊લΛ͚ͨઆ໌͕ύλʔϯͰ͢ɻ
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lϓϩάϥϚʔͱɺλεΫ
Λίʔυߦʹׂ͢ΔεΩ
ϧͷ͋Δਓͷ͜ͱΛࢦ͢ɻ
Robert C. Martin
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lϓϩάϥϚৄࡉͷཧऀͰ͋Δɻ
ͦΕ͕զʑͷࣄͩɻγεςϜͷৼΔ
͍ΛৄࡉʹܾΊΔɻ
ͦͷͨΊʹςΩετݴޠΛ͏ ͦΕ͕
ίʔυͩ
ɻ
Robert C. Martin
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http://www.flickr.com/photos/alanstanton/5863143738/
l୯ʹੴΛΓग़͢߹Ͱɺ
ৗʹ৺ʹಊΛࢥ͍ඳ͔Ͷ
ͳΒͳ͍ɻ
ʕʕ࠾ੴ࡞ۀऀͷ৺ಘ
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ࠓɺ͍͑ͨ͜ͱ
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ϕςϥϯͷݴ͏͜ͱͰड͚ͱΊΑ͏
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ࠓɺ͍͑ͨ͜ͱ
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lཻ͕͋ΕɺͲ͜·Ͱബ͘ͳΒͳ͍
w3VCZίʔυͷ͜͏ʹਓ͕͍Δɻਓ͕ؒlͨͷ͍͠zϓϩάϥϛϯάɻ
wΞδϟΠϧίʔυͷ͜͏ʹਓ͕͍ΔɻιϑτΣΞΛιϑτΣΞͷΑ͏ʹͭ͘Δɻ
wΦʔϓϯιʔείʔυͷ͜͏ʹਓ͕͍ΔɻιϑτΣΞͷࣗ༝ɻ
wίϛϡχςΟίʔυͷ͜͏ʹਓ͕͍Δɻ͋ͳ͕ͨίϛϡχςΟͩɻ
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ࠓɺ͍͑ͨ͜ͱ
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w͍·ͷؾ࣋ͪ ײ
͋ͳ͕ͨॻ͔ͳ͚Ε୭ʹΘΒͳ͍ɻl૬खʹΘΔΑ͏ʹzςΩετͰॻ͘ʹ܇࿅͕ඞཁͩɻ
wͬͨ͜ͱ ࣄ࣮
ࠓҰ͕Μͬͨৄ͘͠ॻ͖͍ͨͩΖ͏͚ͲɺΈΜͳৄࡉΛಡΈ͍͔ͨͳ
wΘ͔ͬͨ͜ͱ ҙݟ
ղऍ
ͪΖΜɺײҎ֎దʹΘΔΑ͏ʹςΩετग़ྗ͢Δʹ܇࿅ɺ܇࿅ɺ܇࿅ɻ
w࣍ʹΔ͜ͱ ܭը
ද໌
ߟ͑Δ͜ͱେࣄ͚ͩΕͲɺ໌ͷࣗͷஔ͖खࢴ ໌ͷࣗʹదʹΘΔΑ͏ʹॻ͚Δ͔ͳ
wγϟτΞτ ײँ
νʔϜʹײँɻؒʹײँɻΑ͍ৼΔ͍ɺॿ͔ͬͨ͜ͱΛϑΟʔυόοΫͯ͠૿͑ͨΒ͏Ε͘͠ͳ͍
lใzͲ͜ʹྗΛೖΕͯॻ͘ͷ͕Α͍͔
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http://www.flickr.com/photos/alanstanton/5863143738/
l୯ʹੴΛΓग़͢߹Ͱɺ
ৗʹ৺ʹಊΛࢥ͍ඳ͔Ͷ
ͳΒͳ͍ɻ
ʕʕ࠾ੴ࡞ۀऀͷ৺ಘ
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(It’s brave new world)
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ԋश
ຊͷ͓ۀքྺҎ্ͷϕςϥϯ͕͓ಧ͚͍ͨ͠·͢
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FJORD BOOT CAMP
!LBLVUBOJ
AS A