質問編集履歴
4
修正
test
CHANGED
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File without changes
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test
CHANGED
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@@ -24,10 +24,14 @@
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24
24
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25
25
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26
26
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27
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+
#### Seqだとうまくいく
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28
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+
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27
29
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```scala
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28
30
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29
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-
//
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31
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+
// OK
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30
32
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31
33
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val seq = List(1,2,3,4,2).toSeq.map(n => n + 1)
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32
34
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33
35
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println(seq)
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36
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+
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37
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+
```
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3
補足説明
test
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File without changes
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test
CHANGED
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@@ -21,3 +21,13 @@
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21
21
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```
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22
22
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23
23
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どういう理屈でこのような違いが出るのでしょうか？
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24
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+
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25
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+
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26
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+
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27
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+
```scala
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28
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+
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29
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+
// Seqだとうまくいく
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30
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+
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31
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+
val seq = List(1,2,3,4,2).toSeq.map(n => n + 1)
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32
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+
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33
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+
println(seq)
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2
タイトル修正
test
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@@ -1 +1 @@
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1
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-
scala
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1
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+
scala メソッドチェーンができない理由
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test
CHANGED
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File without changes
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1
内容修正
test
CHANGED
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File without changes
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test
CHANGED
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@@ -2,13 +2,19 @@
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2
2
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3
3
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```scala
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4
4
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5
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+
// エラー
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6
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+
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5
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-
val list = List(1,2,3,4,2).toSet.map(n => n + 1)
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7
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+
val list = List(1,2,3,4,2).toSet.map(n => n + 1)
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8
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+
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9
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+
println(list)
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6
10
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7
11
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8
12
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13
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+
// OK
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14
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+
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15
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+
val list = List(1,2,3,4,2)
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16
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+
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9
17
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val set = list.toSet
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10
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-
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11
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-
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12
18
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13
19
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println(set.map(n => n + 1)
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14
20
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