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【Go言語】range
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Tomoki Ota
August 30, 2024
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【Go言語】range
Tomoki Ota
August 30, 2024
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Transcript
Tomoki Ota ʲGoݴޠʳrange
Goʹɺdowhileͳ͘ for͔͠ଘࡏ͠ͳ͍ɻ
rangeͱʁ ͷίϐʔ rangeͷධՁ rangeʹ͓͚ΔϙΠϯλ ΞδΣϯμ 3
rangeͱʁ
rangeͱʁ 5 ༷ʑͳσʔλߏʹରͯ͠ɺ෮ॲཧΛߦ ͏ͷʹศརͳํ๏ ΠϯσοΫεऴྃঢ়ଶΛѻ͏ඞཁ͕ͳ͍
rangeͱʁ 6 range͕͍͔ʹͯ͠ΛׂΓͯΔ͔Λ͍ͬͯͳ͍ͱ όάΛى͜͢ݪҼͱͳΓ͔Ͷͳ͍ʂ
จࣈྻ ྻ ྻͷϙΠϯλ εϥΠε Ϛοϓ ड৴νϟωϧ rangeͰ͑Δσʔλߏ
rangeͷ͍ํ
rangeͷ͍ํ
rangeͷ͍ํ
for _ := range s {} ίϯύΠϧΤϥʔ = Λ͓͏ʂ rangeͷ͍ํ
ͷίϐʔ
ͷίϐʔ 13 [{1100} {1200} {1300}]ʹͳΒͳ͍ʂ
GOͰೖ͞ΕΔͷ શͯίϐʔͰ͋Δ
ͷίϐʔ 15 ߏମΛฦؔ͢ͷ݁ՌΛೖ͢Δͱɺͦͷߏମͷίϐʔ͕ߦΘΕΔ ϙΠϯλΛฦؔ͢ͷ݁ՌΛೖ͢ΔͱɺϝϞϦΞυϨεͷίϐʔ͕ߦΘΕΔ (64bitΞʔΩςΫνϟͰΞυϨε64bitͱͳΔɻ)
ͷίϐʔ 16 εϥΠεͷΠϯσοΫεΛ༻͍ͯཁૉʹΞΫηε͢Δ ैདྷͷfor range ϙΠϯλΛ༻͢Δ
εϥΠεͷΠϯσοΫεΛ༻͍ͯཁૉʹΞΫηε͢Δ ैདྷͷfor 17
εϥΠεͷΠϯσοΫεΛ༻͍ͯཁૉʹΞΫηε͢Δ range 18
ϙΠϯλΛ༻͢Δ 19
ϙΠϯλΛ༻͢Δ 20 εϥΠεܕΛมߋ͢Δඞཁ͕͋Δ͕ɺৗʹՄೳͱݶΒͳ͍ ੑೳΛॏࢹ͢Δ߹ɺϙΠϯλͷεϥΠεΛ෮ॲཧ͢Δ͜ͱ༧ଌՄೳੑʹ͔͚ΔͨΊ CPUʹͱͬͯޮ͕ѱ͘ͳΔՄೳੑ͕͋Δ
rangeͷධՁ
rangeͷධՁ 22 range͕ࣜඞਢ
23 for i, v := range exp rangeͷධՁ
24 rangeͷධՁ
25 rangeͷධՁ
26 rangeͷධՁ rangeΛͬͨ࣌ʹ༩͑ΒΕ͕ͨࣜ ։࢝લʹ1͚ͩධՁ͞ΕΔɻ srange͕͏Ұ࣌มʹίϐʔ͞ΕΔɻ
27 rangeͷධՁ(νϟωϧ) rangechΛධՁͯ͠ɺҰ࣌มʹίϐʔ͠ɺ ͦͷνϟωϧͷཁૉʹରͯ͠ɺ෮ॲཧΛߦ͏ɻ ch = ch2ʹؔΘΒͣɺrangech2Ͱͳ͘ ch1ʹରͯ͠ɺ෮ॲཧΛଓ͚Δɻ ch =
ch2ɺchʹ2ͭͷνϟωϧΛೖ͍ͯ͠ΔͷͰɺ ͜ͷίʔυͷޙͰclose(ch)Λݺͼग़͢ͱɺ1ͭͰͳ͘ɺ 2ͭͷνϟωϧ͕Ϋϩʔζ͞ΕΔɻ
28 rangeͷධՁ(ྻ)
29 rangeͷධՁ(ྻ)
30 ࠷ޙͷཁૉͷ࣮ࡍͷͷදࣔํ๏ ΠϯσοΫεΛ͏ํ๏ ྻͷϙΠϯλΛ͏ํ๏
31 ΠϯσοΫεΛ༻͢Δ
32 ྻͷϙΠϯλΛ༻͢Δ
rangeʹ͓͚ΔϙΠϯλ
rangeʹ͓͚ΔϙΠϯλ 34 ΩϟογϡʹཁૉΛૠೖ͢ΔϩδοΫΛ࣮͍ͯ͠Δ
35 rangeʹ͓͚ΔϙΠϯλ
36 rangeʹ͓͚ΔϙΠϯλ
37 rangeʹ͓͚ΔϙΠϯλ
38 ղܾํ๏1 ϩʔΧϧมΛ༻͢Δํ๏
39 ղܾํ๏2 εϥΠεͷΠϯσοΫεΛͬͯɺ֤ཁૉΛࢀর͢ΔϙΠϯλΛ֨ೲ͢Δํ๏