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Head First Golang Image Package
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Seiji Takahashi
November 13, 2018
Programming
10k
2
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Head First Golang Image Package
Talk session @ golang.tokyo #19
Seiji Takahashi
November 13, 2018
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Transcript
Head First Golang image package @__timakin__ golang.tokyo#19
SEIJI TAKAHASHI
None
ΞδΣϯμ *NBHFύοέʔδͷհ ࣮ྫͰֶͿ*NBHFύοέʔδ ը૾ͷ߹ɾՃ ը૾ͱจࣈͷ߹
QBDLBHFl*NBHFz w %ը૾Λѻ͏ͨΊͷύοέʔδ w +1( 1/( (*'ʹରԠ w Ͱ͖Δ͜ͱ w
৭ใऔಘ w 1PJOU 3FDUBOHMFͷૢ࡞ w ݁߹ॲཧʢESBXʣ w ϑΥʔϚοτͷσίʔυ
ྫʣͷ࢛֯ܗΛඳը
ϞβΠΫ γϟʔϓௐ ໌Δ͞ௐ ͳͲɺେମΓ͍ͨ͜ͱͰ͖Δ͕ ίʔυྔ͕ଟ͗͢ΔͷͰׂѪ
ͱ͍͏͔
ؙ࢛֯ͷඳըͱ͔ Ṗͷ৭ௐͱ͔
ͦΜͳ͜ͱͨͯ͘͠ ͜͜ʹ͖ͯ·͔͢ʁ
࣮ફͯ͠Έ·͠ΐ͏ʂ
ը૾ͷ߹ɾՃ
ͱ͜ΖͰօ͞Μ
!EFFFFU͞Μɻ ࠃͰϚΠΫϩαʔϏεͱ ͍͑͜ͷํɻ
Ͱ͕͢ɺ
ˌEFFFFU෩
None
खʹ࣋ͬͨΦϒδΣΫτʢʣΛ தԝʹਾ͑ͳ͕Β ࣸਅΛࡱΔࡱӨٕ๏ʢʁʣ
!?
खʹ࣋ͬͨΦϒδΣΫτʢʣΛ தԝʹਾ͑ͳ͕Β ࣸਅΛࡱΔࡱӨٕ๏ʢʁʣ
ͦΜͳʹखʹ͓͠ΌΕͳ Λ࣋ͭػձͳ͍
୭Ͱख๏Λ࠶ݱͰ͖Δͱศར
None
ɿW
Γ͍ͨ͜ͱ w Ͱ͍͍ײ͡ͷงғؾΛग़͍ͨ͠ w ͦΕΛखʹ࣋ͬͨঢ়ଶͰதԝʹఴ͍͑ͨ w ʹϑΥʔΧε͍ͯ͠Δ෩ʹ͍ͨ͠
ඞཁͳͷ w खɺɺഎܠ
ΦϦδφϧ
ඞཁͳͱ͜Ζ
దͳഎܠΛ୳͢
ݟ͚ͭΔ
࣮ w ྆ը૾ͷಡΈࠐΈ w എܠʹదͳ΅͔͠ΛೖΕΔ w खͷը૾Λਃ͠༁ఔʹαΠζௐ͢Δ w खट͕ࠨԼʹདྷΔΑ͏ʹͬ͢ͱ߹ w
ϑΝΠϧग़ྗ
HJUIVCDPNEJTJOUFHSBUJPOJNBHJOH w JNBHFύοέʔδͷϥούʔ w ΅͔͠໌ௐ͕ͷ͍͢͝؆୯ʹͰ͖Δ
ਃ͠༁ఔͷαΠζௐ
ͬ͢ͱࠨԼʹ߹
ग़ྗʜ
None
ը૾ͷ߹ɾՃ w HJUIVCDPNEJTJOUFHSBUJPOJNBHJOHΛ͏ ͱ͍ͩͿָʹ΅͔͠ͳͲΛೖΕΒΕΔ w ߹ͷࡍج४͕ࠨ্Ͱ͋Δ͜ͱʹҙ w ਖ਼༧֎ͷͦΕͬΆ͞ʹͳͬͨ
ˠਅ໘ͳ
αʔϏεӡ༻தɺ Ϛʔέࢪࡦͱͯ͠0(1ը૾Λ ࡞͢Δ͜ͱ͕͋ΔͷͰʁ
ը૾ͱจࣈͷ߹
Γ͍ͨ͜ͱ w 0(1എܠը૾ʹจࣈΛ߹͢Δ w ҙͷจࣈྻΛҙͷϑΥϯτͰɺ దͳҐஔʹදࣔ͢Δ
ૉࡐ
࣮ w ҙͷϑΥϯτΛಡΈࠐΉ w ͦͷϑΥϯτͰςΩετΛҙͷҐஔʹඳը w എܠͱॏͶ߹Θͤͯॻ͖ग़͠
HJUIVCDPNHPMBOHGSFFUZQFUSVFUZQF w ҙͷϑΥϯτͰςΩετΛҙͷҐஔʹग़͢ʹɺ ௨ৗͷը૾ՃͰෆՄɻ w GSFFUZQFύοέʔδΛ͏ɻ
ϑΥϯτͷಡΈࠐΈ
എܠΛॻ͖ग़͓ͯ͘͠
GPOU%SBXFSΛͬͨςΩετඳը
ग़ྗʜ
ग़ྗʜ
ը૾ͱจࣈͷ߹ w ϑΥϯτҐஔௐΛॊೈʹ͍ͨ͠߹ɺ GSFFUZQFύοέʔδͱGPOU%SBXMFSͷ߹Θٕͤ Ͱ͍͚Δ w ը૾ͷͲͷҐஔʹදࣔ͢Δ͔ɺจࣈͷંΓฦ͠ Ͳ͏͢Δ͔దٓௐͷඞཁ͋Γ
·ͱΊ JNBHFͰ৭ɾେ͖͞ͳͲ͕؆୯ʹऔಘͰ͖Δ ϥούʔΛ͑Ճ؆୯ ߹ͷ߹࠲ඪɾॻ͖ग़͠ॲཧͷ࣮͕ར༻έʔεʹԠ͡ ͯมΘͬͯ͘ΔͷͰҙͷඞཁ͋Γ
͋Γ͕ͱ͏͍͟͝·ͨ͠ʂ