回答編集履歴
1
テキスト修正
test
CHANGED
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@@ -12,17 +12,21 @@
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12
12
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13
13
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var arr2 = arr.reduce(
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14
14
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15
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-
(a, e) =>
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15
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+
(a, e, i) => i % 4 ?
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16
16
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17
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-
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17
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[...a.slice(0, a.length-1), [...a[a.length-1], e] ]
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18
18
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19
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:
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20
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21
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[...a, [e]]
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22
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+
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19
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-
,[
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23
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,[]
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20
24
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21
25
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)
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22
26
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23
27
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```
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28
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25
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- 動作確認用 CodePen: [https://codepen.io/jun68ykt/pen/
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29
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+
- 動作確認用 CodePen: [https://codepen.io/jun68ykt/pen/dyPNpEM?editors=0012](https://codepen.io/jun68ykt/pen/dyPNpEM?editors=0012)
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26
30
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27
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28
32
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