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Tomoki Ota ʲGoݴޠʳ໊લ෇͖໭Γ஋

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໊લ෇͖໭Γ஋ͱ͸ʁ ໊લ෇͖໭Γ஋ͷ࢖༻ྫ ແҙຯͳ໊લ෇͖໭Γ஋ ՄಡੑҎ֎ͷ໊લ෇͖໭Γ஋ ۭreturn ໊લ෇͖໭Γ஋ͷ෭࡞༻ ·ͱΊ ΞδΣϯμ

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໊લ෇͖໭Γ஋ͱ͸ʁ

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GoͰ͸໊લ෇͖໭Γ஋(Named Return Value)͸ ͋·Γ࢖ΘΕͳ͍ ໊લ෇͖໭Γ஋ͱ͸ʁ

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໊લ෇͖໭Γ஋Λ࢖͏ͱɺҾ਺ͳ͠ͷۭreturnจΛݺͼग़ͤΔ ໊લ෇͖໭Γ஋ͱ͸ʁ

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໊લ෇͖໭Γ஋ͷ࢖༻ྫ

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໊લ෇͖໭Γ஋ͷ࢖༻ྫ

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໊લ෇͖໭Γ஋ͷ࢖༻ྫ

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ແҙຯͳ໊લ෇͖໭Γ஋

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ແҙຯͳ໊લ෇͖໭Γ஋ errorܕ͕errorͰ͋Δ͜ͱ͸ࣗ໌

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ՄಡੑҎ֎ͷ໊લ෇͖໭Γ஋

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ՄಡੑҎ֎ͷ໊લ෇͖໭Γ஋

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ՄಡੑҎ֎ͷ໊લ෇͖໭Γ஋

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ۭreturn

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ۭreturn ۭreturn͸Ұൠతʹ୹͍ؔ਺Ͱ༻͍ΒΕΔɻ ௕͍ؔ਺Ͱ࢖༻͢ΔͱɺՄಡੑ͕ѱ͘ͳΔͷͰɺ࢖༻ ͢΂͖Ͱ͸ͳ͍ɻ

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ۭreturn 1ͭͷؔ਺಺ͰɺۭreturnΛ࢖͏͔ɺҾ਺ͷ͋Δ returnΛ࢖༻͢Δ͔Ұ؏ੑΛอͭ͜ͱ͕େࣄɻ

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໊લ෇͖໭Γ஋ͷ෭࡞༻

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໊લ෇͖໭Γ஋ͷ෭࡞༻ ໊લ෇͖໭Γ஋͸ɺθϩ஋ͰॳظԽ͞ΕΔͷͰɺҙਤ ͠ͳ͍όάΛট͘Մೳੑ͕͋Δ

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໊લ෇͖໭Γ஋ͷ෭࡞༻ ઌ΄ͲͷgetCoordinatesΛ֦ ு͠ɺॅॴΛݕূͯ͠ɺ࠲ඪΛ औಘ͢Δɻ·ͨɺ్தͰɺί ϯςΩετͰɺσουϥΠϯ͕ ա͗ͯͳ͍͔΍Ωϟϯηϧ͞ Ε͍ͯͳ͍͔Λݕࠪ͢Δɻ

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໊લ෇͖໭Γ஋ͷ෭࡞༻ if ctx.Err() != nilͰฦ͞ΕΤ ϥʔ͸err͕ͩɺerrʹ͸Կ΋ ୅ೖ͓ͯ͠Βͣɺθϩ஋Ͱ͋Δ nil͔͠ฦ͞ͳ͍ɻ

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໊લ෇͖໭Γ஋ͷ෭࡞༻ err͸໊લ෇͖໭Γ஋ʹΑͬͯ ॳظԽ͍ͯ͠ΔͷͰɺ໊લ෇͖ ໭Γ஋͕ͳ͚Ε͹ɺίϯύΠϧ ΤϥʔͱͳΔɻ

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ղܾ๏1

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ղܾ๏2