回答編集履歴
2
改行前にカンマを追加
test
CHANGED
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@@ -28,7 +28,7 @@
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28
28
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29
29
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zip(a, ThreeCount()).forEach {
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30
30
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31
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-
print($0.0, terminator: $0.1 ? "\n" : ",")
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31
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+
print($0.0, terminator: $0.1 ? ",\n" : ",")
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32
32
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33
33
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}
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34
34
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1
SequenceのElementをBoolにすることで無駄な処理をなくした
test
CHANGED
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@@ -8,23 +8,17 @@
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8
8
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9
9
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var current = 0
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10
10
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11
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-
mutating func next() ->
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11
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+
mutating func next() -> Bool? {
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12
12
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13
13
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let res = current
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14
14
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15
15
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current = (current + 1) % 3
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16
16
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17
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-
return res
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17
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+
return res == 2
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18
18
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19
19
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}
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20
20
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21
21
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}
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22
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-
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23
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-
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24
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-
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25
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-
func isThree(_ val: Int) -> Bool { return val == 3 }
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26
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-
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27
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-
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28
22
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29
23
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30
24
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@@ -34,7 +28,7 @@
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34
28
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35
29
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zip(a, ThreeCount()).forEach {
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36
30
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37
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-
print($0.0, terminator:
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31
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+
print($0.0, terminator: $0.1 ? "\n" : ",")
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38
32
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39
33
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}
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40
34
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