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Tomoki Ota ʲGoݴޠʳ໊લ͖Γ
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໊લ͖Γͱʁ ໊લ͖Γͷ༻ྫ ແҙຯͳ໊લ͖Γ ՄಡੑҎ֎ͷ໊લ͖Γ ۭreturn ໊લ͖Γͷ෭࡞༻ ·ͱΊ ΞδΣϯμ
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໊લ͖Γͱʁ
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GoͰ໊લ͖Γ(Named Return Value) ͋·ΓΘΕͳ͍ ໊લ͖Γͱʁ
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໊લ͖ΓΛ͏ͱɺҾͳ͠ͷۭreturnจΛݺͼग़ͤΔ ໊લ͖Γͱʁ
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໊લ͖Γͷ༻ྫ
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໊લ͖Γͷ༻ྫ
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໊લ͖Γͷ༻ྫ
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ແҙຯͳ໊લ͖Γ
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ແҙຯͳ໊લ͖Γ errorܕ͕errorͰ͋Δ͜ͱࣗ໌
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ՄಡੑҎ֎ͷ໊લ͖Γ
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ՄಡੑҎ֎ͷ໊લ͖Γ
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ՄಡੑҎ֎ͷ໊લ͖Γ
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ۭreturn
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ۭreturn ۭreturnҰൠతʹ͍ؔͰ༻͍ΒΕΔɻ ͍ؔͰ༻͢ΔͱɺՄಡੑ͕ѱ͘ͳΔͷͰɺ༻ ͖͢Ͱͳ͍ɻ
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ۭreturn 1ͭͷؔͰɺۭreturnΛ͏͔ɺҾͷ͋Δ returnΛ༻͢Δ͔Ұ؏ੑΛอͭ͜ͱ͕େࣄɻ
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໊લ͖Γͷ෭࡞༻
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໊લ͖Γͷ෭࡞༻ ໊લ͖ΓɺθϩͰॳظԽ͞ΕΔͷͰɺҙਤ ͠ͳ͍όάΛট͘Մೳੑ͕͋Δ
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໊લ͖Γͷ෭࡞༻ ઌ΄ͲͷgetCoordinatesΛ֦ ு͠ɺॅॴΛݕূͯ͠ɺ࠲ඪΛ औಘ͢Δɻ·ͨɺ్தͰɺί ϯςΩετͰɺσουϥΠϯ͕ ա͗ͯͳ͍͔Ωϟϯηϧ͞ Ε͍ͯͳ͍͔Λݕࠪ͢Δɻ
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໊લ͖Γͷ෭࡞༻ if ctx.Err() != nilͰฦ͞ΕΤ ϥʔerr͕ͩɺerrʹԿ ೖ͓ͯ͠ΒͣɺθϩͰ͋Δ nil͔͠ฦ͞ͳ͍ɻ
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໊લ͖Γͷ෭࡞༻ err໊લ͖ΓʹΑͬͯ ॳظԽ͍ͯ͠ΔͷͰɺ໊લ͖ Γ͕ͳ͚ΕɺίϯύΠϧ ΤϥʔͱͳΔɻ
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ղܾ๏1
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ղܾ๏2