Ϋϩʔδϟ .PCJMF1SPHSBNNJOH
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UI 

ແ໊ؔ਺ Ϋϩʔδϟ 

ແ໊ؔ਺ Ϋϩʔδϟ ͱ͸ʁ w ໊લͷ௨Γ໊લͷͳ͍ؔ਺
w ໊લ͖ͭؔ਺ͱେ͖͘ҧ͏ͱ͜Ζ͸
w ม਺ʹೖΕΒΕΔ
w ஋ͱͯ͠ѻ͑Δͱ͍͏ͱ͜Ζ
w ߏจ΋एׯมΘΓ·͢
w ϥϜμࣜͳΜͯݺͼํ΋ 

Ϋϩʔδϟ෼ΫοΩϯά { } w ೋͭͷ਺஋Λड͚औͬͯ଍͠߹ΘͤΔؔ਺Λߟ͑·͢
w ·ͣ͸Ϋϩʔδϟͷ࢝·ΓͰ͋Δ
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Λهड़ ·ͣ͸͜Εʂ 

Ϋϩʔδϟ෼ΫοΩϯά { (number1: Int, number2: Int) -> Int in } w ࣍ʹΫϩʔδϟ͕ड͚औΔ஋
Ҿ਺
Λઃఆ͍͖ͯ͠·͢
w ࠓճ͸଍͠ࢉͷؔ਺ͳͷͰҾ਺͸ೋͭʹͳΓ·͢
w ؔ਺ͱಉ͡Α͏ʹҾ਺͸
໊લܕ
ͱ͍͏ܗͰఆٛ͞Ε
w ෳ਺͋Δ৔߹͸ΧϯϚͰ۠੾Γ·͢ Ҿ਺ Ҿ਺ Ҿ਺ಉ࢜͸ΧϯϚͰ۠੾Δ 

Ϋϩʔδϟ෼ΫοΩϯά w ࣍ʹ໭Γ஋ΛܾΊ·͢
w ྫ͑͹ࠓճ͸଍͠ࢉͷؔ਺ͳͷͰ*OUܕΛҰͭฦ͠·͢
w Կ΋ฦ͢΋ͷ͕ͳ͍৔߹͸লུՄೳͰ͢
w ͪͳΈʹฦΓ஋ͱ΋ݴͬͨΓ͠·͕͢৭ʑΞϨͳͷͰࠓճ͸໭Γ஋ͱݺͼ·͢
w ΫϩʔδϟͰ͸໭Γ஋ͷޙʹ
JO
ͱ͍͏Ωʔϫʔυ͕ඞཁʹͳΓ·͢ ͜ͷ෦෼͕໭Γ஋ { (number1: Int, number2: Int) -> Int in } ๨Εͣʹʂ 

Ϋϩʔδϟ෼ΫοΩϯά { (number1: Int, number2: Int) -> Int in let result = number1 + number2 return result } w ࠷ޙʹΫϩʔδϟͷத਎Λهड़͍͖ͯ͠·͢
w ໭Γ஋͕͋Δؔ਺ͷ৔߹͸ඞͣ࠷ޙʹ
w SFUVSOΛ࢖༻ͯ͠஋Λฦ͢ඞཁ͕͋Γ·͢
໭Γ஋Λฦ͢ ؔ਺Ͱߦ͏ॲཧ 

Ϋϩʔδϟͷݺͼग़͠ w ؔ਺ͱಉ༷ʹΫϩʔδϟ͸ݺͼग़͞ΕΔ·Ͱ͸࣮ߦ͞Εͳ͍
w ͦͷͨΊఆٛͨ͠ޙʹඞͣݺͼग़͢ඞཁ͕͋Δ
w ΫϩʔδϟΛݺͼग़͢৔߹͸جຊతʹҰ౓ม਺ʹೖΕΔඞཁ͕͋Δ // Ϋϩʔδϟͷఆٛ let closure = { (number1: Int, number2: Int) -> Int in let result = number1 + number2 return result } // Ϋϩʔδϟͷݺͼग़͠ let added = closure(10, 10) print("result is: \(added)") // 20 

ؔ਺ܕҾ਺ ճ໨ 

ؔ਺ܕҾ਺ʁ w ઌ΄Ͳઆ໌ͨ͠ΫϩʔδϟΛҾ਺ʹͨ͠ͱ͖ͷ໊લ
w Ϋϩʔδϟ͸஋ͱͯ͠ѻ͑ΔͨΊؔ਺ͷҾ਺ʹ΋౉͢͜ͱ ͕Ͱ͖Δ
w ܁Γฦ͠ͷ࣌ʹग़͖ͯͨNBQ΋ΫϩʔδϟΛҾ਺ʹͱΔ ؔ਺Ͱ͋Δ 

ؔ਺ܕҾ਺ʁ // ΫϩʔδϟΛҾ਺ʹؚΉؔ਺ఆٛ func calculate(number1: Int, number2: Int, calc: ((Int, Int) -> Int)) -> Int { return calc(number1, number2) } // ؔ਺ݺͼग़͠(ΫϩʔδϟҎ֎ͷҾ਺ΛຒΊΔ) calculate(number1: 10, number2: 10, calc:) 

ؔ਺ܕҾ਺ʁ // ΫϩʔδϟΛҾ਺ʹؚΉؔ਺ఆٛ func calculate(number1: Int, number2: Int, calc: ((Int, Int) -> Int)) -> Int { return calc(number1, number2) } // ؔ਺ݺͼग़͠(Ϋϩʔδϟͷ࢝·ΓͷΧοίΛॻ͍ͯɾɾɾ)͘ calculate(number1: 10, number2: 10, calc: { }) 

ؔ਺ܕҾ਺ʁ // ΫϩʔδϟΛҾ਺ʹؚΉؔ਺ఆٛ func calculate(number1: Int, number2: Int, calc: ((Int, Int) -> Int)) -> Int { return calc(number1, number2) } // ؔ਺ݺͼग़͠(Ҿ਺ͷ໊લͱܕͱ໭Γ஋ͷܕΛॻ͍ͯɾɾɾɾ) calculate(number1: 10, number2: 10, calc: { (num1: Int, num2: Int) -> Int }) 

ؔ਺ܕҾ਺ʁ // ΫϩʔδϟΛҾ਺ʹؚΉؔ਺ఆٛ func calculate(number1: Int, number2: Int, calc: ((Int, Int) -> Int)) -> Int { return calc(number1, number2) } // ؔ਺ݺͼग़͠(in ΩʔϫʔυΛॻ͍ͯɾɾɾ) calculate(number1: 10, number2: 10, calc: { (num1: Int, num2: Int) -> Int in }) 

ؔ਺ܕҾ਺ʁ // ΫϩʔδϟΛҾ਺ʹؚΉؔ਺ఆٛ func calculate(number1: Int, number2: Int, calc: ((Int, Int) -> Int)) -> Int { return calc(number1, number2) } // ؔ਺ݺͼग़͠(࠷ޙʹॲཧΛॻ͘ɾɾɾ) calculate(number1: 10, number2: 10, calc: { (num1: Int, num2: Int) -> Int in return num1 + num2 }) 

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(PPPPPPPPPPPPPPPPPPPPPPPPP 

ྲྀੴʹΊΜͲ͍͘͞ 

Ϋϩʔδϟͷলུه๏ 

͖ͬ͞ͷྫΛ΋͏Ұ౓ // ͬͪ͜͸লུͰ͖ͳ͍͕ɾɾɾ func calculate(number1: Int, number2: Int, calc: ((Int, Int) -> Int)) -> Int { return calc(number1, number2) } // ͬͪ͜͸লུ͢Δͱɾɾɾ calculate(number1: 10, number2: 10, calc: { (num1: Int, num2: Int) -> Int return num1 + num2 }) ͜ͷ௕͍Ϋϩʔδϟ͕͋Δ͡ΌΖʁ 

͖ͬ͞ͷྫΛ΋͏Ұ౓ // ͬͪ͜͸লུͰ͖ͳ͍͕ɾɾɾ func calculate(number1: Int, number2: Int, calc: ((Int, Int) -> Int)) -> Int { return calc(number1, number2) } // ͬͪ͜͸লུ͢Δͱɾɾɾ calculate(number1: 10, number2: 10) { (num1, num2) in return num1 + num2 } ͜ΕΛ͜͏ͯ͠ɾɾɾ 

͖ͬ͞ͷྫΛ΋͏Ұ౓ // ͬͪ͜͸লུͰ͖ͳ͍͕ɾɾɾ func calculate(number1: Int, number2: Int, calc: ((Int, Int) -> Int)) -> Int { return calc(number1, number2) } // ͬͪ͜͸লུ͢Δͱɾɾɾ calculate(number1: 10, number2: 10ʣ{ $0 + $1 } ͜͏͡Όʂ 

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ॱΛ௥ͬͯઆ໌͠·͢ 

Ϋϩʔδϟͷޙஔه๏ 

Ϋϩʔδϟͷޙஔه๏ w ؔ਺ͷҾ਺ͷ࠷ޙ͕Ϋϩʔδϟͷ৔߹ͦͷΫϩʔδϟΛҾ ਺Ϧετͷ֎ʹग़͢͜ͱ͕Ͱ͖·͢
w ͜ΕΛΫϩʔδϟͷޙஔه๏ 5SBJMMJOH
$MPTVSF ͱݺͼ· ͢ calculate(number1: 10, number2: 10) { (num1: Int, num2: Int) -> Int in return num1 + num2 } calculate(number1: 10, number2: 10, calc: { (num1: Int, num2: Int) -> Int return num1 + num2 }) #FGPSF "GUFS 

Ϋϩʔδϟͷܕͷলུ 

Ϋϩʔδϟͷܕͷলུ w 4XJGUʹ͸ܕਪ࿦͕͋ΔͨΊΫϩʔδϟͷҾ਺ͱ໭Γ஋ͷ ܕΛলུͰ͖Δ৔߹͕͋Γ·͢ calculate(number1: 10, number2: 10) { (num1, num2) in return num1 + num2 } calculate(number1: 10, number2: 10) { (num1: Int, num2: Int) -> Int in return num1 + num2 } #FGPSF "GUFS 

Ϋϩʔδϟͷม਺໊ͷ লུ 

Ϋϩʔδϟͷม਺໊ͷলུ w Ϋϩʔδϟͷॲཧ͕ߦͰࡁΉ৔߹͸ม਺ͷ໊લ΋লུ͢Δ͜ͱ͕ Ͱ͖·͢
w ୅ΘΓʹ
O
ͱ͍͏දهΛ࢖͍·͢
w Ҿ਺͕ෳ਺͋Δ৔߹͸ࠨ͔Β

ʜͱ͍͏ܗʹͳΓ·͢
w ·ͨɺSFUVSO
΋লུՄೳͰ͢ calculate(number1: 10, number2: 10) { $0 + $1 } calculate(number1: 10, number2: 10) { (num1, num2) in return num1 + num2 } #FGPSF "GUFS