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࣮ફ
ͭͷϝϞϦϦʔΫ
Ͳ͏ݟ͚ͭΔʁ
J045FTU0OMJOF,VOJXBL
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ϝϞϦϦʔΫͱ
2
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ϝϞϦϦʔΫͱɺ͏༻͞Εͳ͍
Ϧιʔε͕ϝϞϦʹ֬อ͞Εଓ͚Δ͜ͱ
IUUQTFOXJLJQFEJBPSHXJLJ.FNPSZ@MFBLΛ༁ɾཁͨ͠ͷɻຊޠͷํ
͋·Γ͍͍આ໌Ͱͳ͔ͬͨʜ
3
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ϝϞϦϦʔΫ͕͋Δͱɺ͑ΔϝϞϦ͕
ঃʑʹݮ͍ͬͯ͘
͢ΔͱϝϞϦϓϨογϟʔ͕֤ΞϓϦʹ
͔͚ΒΕɺͦΕͰϝϞϦ͕Βͳ͍ͱ
ΞϓϦ͕KFUTBNʢւʹϙΠʣ͞ΕΔ
ৄ͘͠ʮ*EFOUJGZJOHIJHINFNPSZVTFXJUIKFUTBNFWFOUSFQPSUTʯΛࢀরɻ
IUUQTEFWFMPQFSBQQMFDPNEPDVNFOUBUJPOYDPEFJEFOUJGZJOHIJHINFNPSZVTFXJUIKFUTBNFWFOUSFQPSUT
4
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Α͏͢ΔʹϝϞϦϦʔΫͷ͋ΔΞϓϦΛ
࣌ؒ͏ͱڧ੍ऴྃ͞ΕΔˡࠔΔ
5
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ϝϞϦϦʔΫԿ͕
ݪҼͰى͜Δͷ͔
6
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॥ࢀর
4XJGUࢀরΧϯτํࣜͳͷͰɺ
॥ࢀর͕͋Δͱ॥ࢀরύε্ͷ
ΦϒδΣΫτͷࢀরΧϯτ͕ʹ
ͳΒͣͥΜͿղ์͞Εͳ͍
7
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ߪಡղআΕ
͏Πϕϯτ͕͜ͳ͍ͷʹߪಡΛ
ଓ͚Δͱɺ॥ࢀরͰͳ͍͕
͏ΘΕͳ͍Ϧιʔε͕ϝϞϦʹ
Γଓ͚ΔͷͰϝϞϦϦʔΫʹͳΔ
8
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ϝϞϦϦʔΫΛ
Ͳ͏ݟ͚ͭΔ͔
9
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10
ϝϞϦϦʔΫʹΑΔڧ੍ऴྃͷൃੜΛΔ
ϝϞϦϦʔΫ͕ൃੜ͍ͯ͠ΔॴΛߜΓࠐΉ
ϝϞϦϦʔΫͷݪҼΛಛఆ͢Δ
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ϝϞϦϦʔΫ͕ൃੜ͍ͯ͠ΔॴΛߜΓࠐΉ
ϝϞϦϦʔΫͷݪҼΛಛఆ͢Δ
ࠓͷൃද͜͜
ϝϞϦϦʔΫʹΑΔڧ੍ऴྃͷൃੜΛΔ
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9DPEFͷ%FCVH/BWJHBUPS
9DPEFͷ%FCVH.FNPSZ(SBQI
*OTUSVNFOUTͷ-FBLT
UBSVOPO9$5"TTFSU/P-FBL
12
1
2
3
4
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9DPEFͷ%FCVH/BWJHBUPSͷϝϞϦάϥϑ
ϝϞϦ༻ྔΛݟΒΕΔ͕
ҙ͕ඞཁʢޙड़ʣ
13
1
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9DPEFͷ%FCVH.FNPSZ(SBQI
͜ͷϘλϯΛԡ͢ͱग़Δͭ
14
2
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ΦϒδΣΫτͷࢀরάϥϑΛݟΒΕΔ
15
9DPEFͷ%FCVH.FNPSZ(SBQI
2
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ϝϞϦϦʔΫΛݕग़͢Δͱҹ͕ͭ͘
16
9DPEFͷ%FCVH.FNPSZ(SBQI
2
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*OTUSVNFOUTͷ-FBLT
͜ͷϘλϯΛԡ͢ͱग़Δͭ
17
3
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3
ϝϞϦϦʔΫΛࣗಈݕग़ͯ͠ఆظతʹݕࠪ݁ՌͷϚʔΫ͕ग़Δ
ʜϦʔΫͳ͠ ʜ৽ϦʔΫ͋Γ ʜ৽ϦʔΫͳ͠
*OTUSVNFOUTͷ-FBLT
ϝϞϦͷ༻ྔάϥϑ͕ݟΒΕΔ
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UBSVOPO9$5"TTFSU/P-FBL
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4
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ϝϞϦϦʔΫΛݕग़͢Δͱςετ͕ࣦഊ͢Δ
20
UBSVOPO9$5"TTFSU/P-FBL
4
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ϝϞϦϦʔΫΛݕग़͢Δͱςετ͕ࣦഊ͢Δ
21
UBSVOPO9$5"TTFSU/P-FBL
4
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͜ΕΒͷπʔϧΛͬͯͭͷ
ϝϞϦϦʔΫΛݟͯΈ·͠ΐ͏
22
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ͭͷϝϞϦϦʔΫΛൃੜͤ͞Δ
ΞϓϦΛ༻ҙ͠·ͨ͠
23
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,VOJXBL.FNPSZ-FBL1MBZHSPVOE
ʮ&YFSDJTF9ʯΛλοϓ͢Δͱɺ
͞·͟·ͳछྨͷϝϞϦϦʔΫΛ
Ҿ͖ى͜͠·͢
24
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&YFSDJTF
public class Exercise1_1 {
var value: Any?
private let weight = Weight1()
}
public static func exercise1_1() -> Exercise1_1 {
let x = Exercise1_1()
x.value = x
return x
}
॥ࢀরΛͭ͘Δ
άϥϑͷมԽΛΘ͔Γ͘͢
͢ΔͨΊͷେ͖ͳΦϒδΣΫτ
25
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&YFSDJTF
class Weight1 {
private var data: [UInt64] = Array(
repeating: 0,
count: 1024 * 1024
)
}
͓Αͦ.J#ͷ༰ྔΛ֬อ
26
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9DPEFͷ%FCVH/BWJHBUPS
27
1
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&YFSDJTFΛλοϓ͢Δͱ
૿͑ͨ··ݮΒͳ͍
ʢϝϞϦϦʔΫ͍ͯ͠Δʣ
28
1
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9DPEFͷ%FCVH.FNPSZ(SBQI
29
2
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ϝϞϦϦʔΫͷࣗಈݕʹҾ͔͔ͬͬͨ
॥ࢀরͷ༷ࢠΛڭ͑ͯ͘ΕΔ
30
2
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*OTUSVNFOUTͷ-FBLT
31
3
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ϝϞϦϦʔΫͷࣗಈݕʹҾ͔͔ͬͬͨ
૿͑ͨ··ݮ͍ͬͯͳ͍ʢϦʔΫ͍ͯ͠Δʣ
32
3
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9$5"TTFSU/P-FBL
33
4
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ϝϞϦϦʔΫΛݕͨ͠
34
4
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&YFSDJTF·ͱΊ
%FCVH/BWJHBUPS
%FCVH.FNPSZ
(SBQI
*OTUSVNFOUT
ͷϝϞϦάϥϑ
*OTUSVNFOUTͷࣗಈ
ݕ
9$5"TTFSU/P-FBL
✅ ✅ ✅ ✅ ✅
35
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&YFSDJTF
public class Exercise1_2 {
var value: Any?
private let weight = Weight2()
}
public static func exercise1_2() -> Exercise1_2 {
let x = Exercise1_2()
x.value = x
return x
}
॥ࢀরΛͭ͘Δ
άϥϑͷมԽΛΘ͔Γ͘͢
͢ΔͨΊͷେ͖ͳΦϒδΣΫτ
36
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&YFSDJTF
@implementation Weight2
- (id)init {
if (self = [super init]) {
size_t size8MiB = 8*1024*1024;
void* mem = malloc(size8MiB);
if (mem == NULL) {
return self;
}
// NOTE: Avoid memory overcommit.
memset(mem, size8MiB, 1);
_mem = mem;
}
return self;
}
NBMMPDͰಉ͡༰ྔͷϝϞϦΛ
֬อ͍ͯ͠Δ
37
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9DPEFͷ%FCVH/BWJHBUPS
38
1
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ΜʁͳΜ͔มΘͬͨʜ͔ʁ
ʢɿಉ͡༰ྔΛϝϞϦϦʔΫͯ͠·͢ʣ
39
1
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9DPEFͷ%FCVH.FNPSZ(SBQI
40
2
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ϝϞϦϦʔΫͷࣗಈݕʹҾ͔͔ͬͬͨ
॥ࢀরͷ༷ࢠΛڭ͑ͯ͘ΕΔ
41
2
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*OTUSVNFOUTͷ-FBLT
42
3
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ϝϞϦϦʔΫͷࣗಈݕʹҾ͔͔ͬͬͨ
૿͑ͨ··ݮ͍ͬͯͳ͍ʢϦʔΫ͍ͯ͠Δʣ
43
3
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9$5"TTFSU/P-FBL
44
4
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ϝϞϦϦʔΫΛݕͨ͠
45
4
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&YFSDJTF·ͱΊ
%FCVH/BWJHBUPS
%FCVH.FNPSZ
(SBQI
*OTUSVNFOUT
ͷϝϞϦάϥϑ
*OTUSVNFOUTͷࣗಈ
ݕ
9$5"TTFSU/P-FBL
🤔 ✅ ✅ ✅ ✅
46
NBMMPDͰ֬อ͞ΕͨϝϞϦ͕දࣔ͞Εͳ͍
Slide 47
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&YFSDJTF
public class Exercise1_3 {
var value: Any?
private let weight = Weight3()
}
public static func exercise1_3() -> Exercise1_3 {
let x = Exercise1_3()
x.value = x
return x
}
॥ࢀরΛͭ͘Δ
άϥϑͷมԽΛΘ͔Γ͘͢
͢ΔͨΊͷେ͖ͳΦϒδΣΫτ
47
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&YFSDJTF
class Weight3 {
private let data = Data(count: 8 * 1024 * 1024)
}
48
%BUBͰಉ͡༰ྔͷϝϞϦΛ֬อ
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9DPEFͷ%FCVH/BWJHBUPS
49
1
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ΜʁͳΜ͔มΘͬͨʜ͔ʁ
ʢɿಉ͡༰ྔΛϝϞϦϦʔΫͯ͠·͢ʣ
50
1
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&YFSDJTF·ͱΊ
%FCVH/BWJHBUPS
%FCVH.FNPSZ
(SBQI
*OTUSVNFOUT
ͷϝϞϦάϥϑ
*OTUSVNFOUTͷࣗಈ
ݕ
9$5"TTFSU/P-FBL
🤔 ✅ ✅ ✅ ✅
51
%BUBͰ֬อ͞ΕͨϝϞϦ͕දࣔ͞Εͳ͍
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&YFSDJTF
public static func exercise2() -> Exercise2 {
let x = Exercise2()
var values = [Any]()
values.append(Weight2() as Any)
for _ in 0..<100 {
values.append(Exercise2())
}
let y = Indirect()
values.append(y)
y.value = ["y": x]
for _ in 0..<100 {
values.append(Exercise2())
}
x.value = values
return x
άϥϑͷมԽΛΘ͔Γ͘͢
͢ΔͨΊͷେ͖ͳΦϒδΣΫτ
॥ࢀরΛՃ
ແؔͳࢀরΛͨ͘͞ΜՃ
ແؔͳࢀরΛͨ͘͞ΜՃ
52
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&YFSDJTF·ͱΊ
%FCVH/BWJHBUPS
%FCVH.FNPSZ
(SBQI
*OTUSVNFOUT
ͷϝϞϦάϥϑ
*OTUSVNFOUTͷࣗಈ
ݕ
9$5"TTFSU/P-FBL
🤔 ✅ ✅ ✅ ✅
53
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&YFSDJTF
public static func exercise3() -> Exercise3 {
let x = Exercise3()
let y = Indirect()
x.value = y
var prev = y
for _ in 0..<100 {
let z = Indirect()
prev.value = z
prev = z
}
prev.value = x
େͳ॥ࢀরύεΛઃఆ
54
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9DPEFͷ%FCVH/BWJHBUPS
55
1
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ΜʁͳΜ͔มΘͬͨʜ͔ʁ
ʢɿಉ͡༰ྔΛϝϞϦϦʔΫͯ͠·͢ʣ
56
1
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9DPEFͷ%FCVH.FNPSZ(SBQI
57
2
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ϝϞϦϦʔΫͷࣗಈݕʹҾ͔͔ͬΒͳ͍ʂ
58
2
Slide 59
Slide 59 text
*OTUSVNFOUTͷ-FBLT
59
3
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ϝϞϦϦʔΫͷࣗಈݕʹҾ͔͔ͬΒͳ͍ʂ
૿͑ͨ··ݮ͍ͬͯͳ͍ʢϦʔΫ͍ͯ͠Δʣ
60
3
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9$5"TTFSU/P-FBL
61
4
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ϝϞϦϦʔΫΛݕͨ͠
62
4
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&YFSDJTF·ͱΊ
%FCVH/BWJHBUPS
%FCVH.FNPSZ
(SBQI
*OTUSVNFOUT
ͷϝϞϦάϥϑ
*OTUSVNFOUTͷࣗಈ
ݕ
9$5"TTFSU/P-FBL
🤔 ❌ ✅ ❌ ✅
େͳ॥ࢀরݕͰ͖ͣ େͳ॥ࢀরݕͰ͖ͣ
63
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&YFSDJTF
public class Exercise4 {
var value: Any?
private let weight = Weight1()
init() {
let x = Indirect()
x.value = { _ = self }
self.value = x
}
}
Ϋϩʔδϟ͕ࣗΛڧࢀরͰ
Ωϟϓνϟͯ͠॥ࢀরͤ͞Δ
64
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&YFSDJTF·ͱΊ
%FCVH/BWJHBUPS
%FCVH.FNPSZ
(SBQI
*OTUSVNFOUT
ͷϝϞϦάϥϑ
*OTUSVNFOUTͷࣗಈ
ݕ
9$5"TTFSU/P-FBL
🤔 ✅ ✅ ✅ ✅
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&YFSDJTF
public static func exercise5() -> Exercise5_1 {
let x = Exercise5_1()
let y = Exercise5_2.init(x)
x.value = y
return x
}
0CKFDUJWF$ͱ4XJGUͷؒͰ
॥ࢀরͤ͞Δ
66
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&YFSDJTF·ͱΊ
%FCVH/BWJHBUPS
%FCVH.FNPSZ
(SBQI
*OTUSVNFOUT
ͷϝϞϦάϥϑ
*OTUSVNFOUTͷࣗಈ
ݕ
9$5"TTFSU/P-FBL
🤔 ✅ ✅ ✅ ✅
67
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&YFSDJTF
public class Exercise6: EventHubObserver {
private let weight = Weight2()
init() {
EventHub.shared.add(observer: self)
}
deinit {
EventHub.shared.removeObserver(observer: self)
}
}
EFJOJUͰߪಡղআ͢Δ͜ͱΛ
ҙਤͨ͠ίʔυ͕ͩɺ
ͦͦߪಡղআ͞Εͳ͍ͱ
ࢀর͕͍ͬͯͯEFJOJU͕
Βͳ͍ͷͰϝϞϦϦʔΫ͢Δ
68
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&YFSDJTF·ͱΊ
%FCVH/BWJHBUPS
%FCVH.FNPSZ
(SBQI
*OTUSVNFOUT
ͷϝϞϦάϥϑ
*OTUSVNFOUTͷࣗಈ
ݕ
9$5"TTFSU/P-FBL
🤔 ❌ ✅ ❌ ✅
॥ࢀরͰͳ͍ͷͰݕͰ͖ͣ ॥ࢀরͰͳ͍ͷͰݕͰ͖ͣ
69
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&YFSDJTF
public class Exercise7 {
var value: Any?
private let weight = Weight2()
public class Indirect: CustomReflectable {
var value: Any?
public var customMirror: Mirror {
return Mirror(self, children: [])
}
}
.JSSPS SF
fl
FDUJOH
Ͱ
ԿTUPSFEQSPQ͕
ͳ͍ͱࡨ֮ͤ͞Δ
70
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&YFSDJTF·ͱΊ
%FCVH/BWJHBUPS
%FCVH.FNPSZ
(SBQI
*OTUSVNFOUT
ͷϝϞϦάϥϑ
*OTUSVNFOUTͷࣗಈ
ݕ
9$5"TTFSU/P-FBL
🤔 ✅ ✅ ✅ ❌
.JSSPSʹґଘ͍ͯ͠ΔͷͰ$VTUPN3F
fl
FDUBCMF͕
࣮͞Ε͍ͯΔΦϒδΣΫτͰෆਖ਼֬ͳ݁ՌʹͳΔ
71
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&YFSDJTF·ͱΊ
&YFSDJTF %FCVH/BWJHBUPS
%FCVH.FNPSZ
(SBQI
*OTUSVNFOUT
ͷϝϞϦάϥϑ
*OTUSVNFOUTͷ
ࣗಈݕ
9$5"TTFSU/P-FBL
✅ ✅ ✅ ✅ ✅
🤔 ✅ ✅ ✅ ✅
🤔 ✅ ✅ ✅ ✅
🤔 ✅ ✅ ✅ ✅
🤔 ❌ ✅ ❌ ✅
🤔 ✅ ✅ ✅ ✅
🤔 ✅ ✅ ✅ ✅
🤔 ❌ ✅ ❌ ✅
🤔 ✅ ✅ ✅ ❌
72
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&YFSDJTF·ͱΊ
&YFSDJTF %FCVH/BWJHBUPS
%FCVH.FNPSZ
(SBQI
*OTUSVNFOUT
ͷϝϞϦάϥϑ
*OTUSVNFOUTͷ
ࣗಈݕ
9$5"TTFSU/P-FBL
✅ ✅ ✅ ✅ ✅
🤔 ✅ ✅ ✅ ✅
🤔 ✅ ✅ ✅ ✅
🤔 ✅ ✅ ✅ ✅
🤔 ❌ ✅ ❌ ✅
🤔 ✅ ✅ ✅ ✅
🤔 ✅ ✅ ✅ ✅
🤔 ❌ ✅ ❌ ✅
🤔 ✅ ✅ ✅ ❌
NBMMPDͰ֬อ͞ΕͨϝϞϦ%BUBͳͲͷϝϞϦ
༻ྔ͕ݟ͑ͳ͍ɻϝϞϦϦʔΫͯ͠ͳ͍Α͏ʹ
ݟ͑ͯϝϞϦϦʔΫ͍ͯ͠Δ͜ͱ͕͋Γ͏Δ
73
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&YFSDJTF·ͱΊ
&YFSDJTF %FCVH/BWJHBUPS
%FCVH.FNPSZ
(SBQI
*OTUSVNFOUT
ͷϝϞϦάϥϑ
*OTUSVNFOUTͷ
ࣗಈݕ
9$5"TTFSU/P-FBL
✅ ✅ ✅ ✅ ✅
🤔 ✅ ✅ ✅ ✅
🤔 ✅ ✅ ✅ ✅
🤔 ✅ ✅ ✅ ✅
🤔 ❌ ✅ ❌ ✅
🤔 ✅ ✅ ✅ ✅
🤔 ✅ ✅ ✅ ✅
🤔 ❌ ✅ ❌ ✅
🤔 ✅ ✅ ✅ ❌
॥ࢀরύε͕͍߹ɺߪಡͷ
ղআΕݕͰ͖ͳ͍ɻࣗಈݕͰ
ϝϞϦϦʔΫ͕͋ΔͱݴΘΕͨ߹
৴༻ͯ͠ྑ͍͕ɺٯա৴͍͚ͯ͠ͳ͍
74
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&YFSDJTF·ͱΊ
&YFSDJTF %FCVH/BWJHBUPS
%FCVH.FNPSZ
(SBQI
*OTUSVNFOUT
ͷϝϞϦάϥϑ
*OTUSVNFOUTͷ
ࣗಈݕ
9$5"TTFSU/P-FBL
✅ ✅ ✅ ✅ ✅
🤔 ✅ ✅ ✅ ✅
🤔 ✅ ✅ ✅ ✅
🤔 ✅ ✅ ✅ ✅
🤔 ❌ ✅ ❌ ✅
🤔 ✅ ✅ ✅ ✅
🤔 ✅ ✅ ✅ ✅
🤔 ❌ ✅ ❌ ✅
🤔 ✅ ✅ ✅ ❌
҆ఆͯ͠ϝϞϦͷ༻ྔͷ૿ݮΛ
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&YFSDJTF·ͱΊ
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&YFSDJTF·ͱΊ
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·ͱΊ
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